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Driver core changes for 5.16-rc1 

Here is the big set of driver core changes for 5.16-rc1.
 
 All of these have been in linux-next for a while now with no reported
 problems.
 
 Included in here are:
 	- big update and cleanup of the sysfs abi documentation files
 	  and scripts from Mauro.  We are almost at the place where we
 	  can properly check that the running kernel's sysfs abi is
 	  documented fully.
 	- firmware loader updates
 	- dyndbg updates
 	- kernfs cleanups and fixes from Christoph
 	- device property updates
 	- component fix
 	- other minor driver core cleanups and fixes
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the big set of driver core changes for 5.16-rc1.

  All of these have been in linux-next for a while now with no reported
  problems.

  Included in here are:

   - big update and cleanup of the sysfs abi documentation files and
     scripts from Mauro. We are almost at the place where we can
     properly check that the running kernel's sysfs abi is documented
     fully.

   - firmware loader updates

   - dyndbg updates

   - kernfs cleanups and fixes from Christoph

   - device property updates

   - component fix

   - other minor driver core cleanups and fixes"

* tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (122 commits)
  device property: Drop redundant NULL checks
  x86/build: Tuck away built-in firmware under FW_LOADER
  vmlinux.lds.h: wrap built-in firmware support under FW_LOADER
  firmware_loader: move struct builtin_fw to the only place used
  x86/microcode: Use the firmware_loader built-in API
  firmware_loader: remove old DECLARE_BUILTIN_FIRMWARE()
  firmware_loader: formalize built-in firmware API
  component: do not leave master devres group open after bind
  dyndbg: refine verbosity 1-4 summary-detail
  gpiolib: acpi: Replace custom code with device_match_acpi_handle()
  i2c: acpi: Replace custom function with device_match_acpi_handle()
  driver core: Provide device_match_acpi_handle() helper
  dyndbg: fix spurious vNpr_info change
  dyndbg: no vpr-info on empty queries
  dyndbg: vpr-info on remove-module complete, not starting
  device property: Add missed header in fwnode.h
  Documentation: dyndbg: Improve cli param examples
  dyndbg: Remove support for ddebug_query param
  dyndbg: make dyndbg a known cli param
  dyndbg: show module in vpr-info in dd-exec-queries
  ...
This commit is contained in:
Linus Torvalds 2021-11-04 08:32:38 -07:00
Родитель 5c904c66ed 27e0bcd029
Коммит 95faf6ba65
83 изменённых файлов: 2810 добавлений и 1262 удалений
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11
Documentation/ABI/obsolete/o2cb Normal file
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@ -0,0 +1,11 @@
What: /sys/o2cb
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com
Description: Ocfs2-tools looks at 'interface-revision' for versioning
information. Each logmask/ file controls a set of debug prints
and can be written into with the strings "allow", "deny", or
"off". Reading the file returns the current state.
Was renamed to /sys/fs/u2cb/
Users: ocfs2-tools. It's sufficient to mail proposed changes to
ocfs2-devel@oss.oracle.com.

4
Documentation/ABI/obsolete/sysfs-bus-iio
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@ -6,6 +6,7 @@ Description:
Since Kernel 5.11, multiple buffers are supported.
so, it is better to use, instead:
/sys/bus/iio/devices/iio:deviceX/bufferY/length
What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
@ -17,6 +18,7 @@ Description:
Since Kernel 5.11, multiple buffers are supported.
so, it is better to use, instead:
/sys/bus/iio/devices/iio:deviceX/bufferY/enable
What: /sys/bus/iio/devices/iio:deviceX/scan_elements
@ -165,6 +167,7 @@ Description:
Since Kernel 5.11, multiple buffers are supported.
so, it is better to use, instead:
/sys/bus/iio/devices/iio:deviceX/bufferY/watermark
What: /sys/bus/iio/devices/iio:deviceX/buffer/data_available
@ -179,4 +182,5 @@ Description:
Since Kernel 5.11, multiple buffers are supported.
so, it is better to use, instead:
/sys/bus/iio/devices/iio:deviceX/bufferY/data_available

2
Documentation/ABI/stable/o2cb
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@ -1,4 +1,4 @@
What: /sys/fs/o2cb/ (was /sys/o2cb)
What: /sys/fs/o2cb/
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com

64
Documentation/ABI/stable/sysfs-class-infiniband
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@ -232,10 +232,10 @@ Description: The RoCE type of the associated GID resides at index <gid-index>.
or "RoCE v2" for RoCE v2 based GIDs.
What: /sys/class/infiniband_mad/umadN/ibdev
What: /sys/class/infiniband_mad/umadN/port
What: /sys/class/infiniband_mad/issmN/ibdev
What: /sys/class/infiniband_mad/issmN/port
What: /sys/class/infiniband_mad/umad<N>/ibdev
What: /sys/class/infiniband_mad/umad<N>/port
What: /sys/class/infiniband_mad/issm<N>/ibdev
What: /sys/class/infiniband_mad/issm<N>/port
Date: Apr, 2005
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
@ -261,8 +261,8 @@ Description:
userspace ABI compatibility of umad & issm devices.
What: /sys/class/infiniband_verbs/uverbsN/ibdev
What: /sys/class/infiniband_verbs/uverbsN/abi_version
What: /sys/class/infiniband_verbs/uverbs<N>/ibdev
What: /sys/class/infiniband_verbs/uverbs<N>/abi_version
Date: Sept, 2005
KernelVersion: v2.6.14
Contact: linux-rdma@vger.kernel.org
@ -471,7 +471,7 @@ Description:
=============== ======================================================
What: /sys/class/infiniband/qibX/ports/N/sl2vl/[0-15]
What: /sys/class/infiniband/qibX/ports/<N>/sl2vl/[0-15]
Date: May, 2010
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
@ -480,8 +480,8 @@ Description:
the Service Level (SL). Listing the SL files returns the Virtual
Lane (VL) as programmed by the SL.
What: /sys/class/infiniband/qibX/ports/N/CCMgtA/cc_settings_bin
What: /sys/class/infiniband/qibX/ports/N/CCMgtA/cc_table_bin
What: /sys/class/infiniband/qibX/ports/<N>/CCMgtA/cc_settings_bin
What: /sys/class/infiniband/qibX/ports/<N>/CCMgtA/cc_table_bin
Date: May, 2010
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
@ -499,11 +499,11 @@ Description:
delay.
=============== ================================================
What: /sys/class/infiniband/qibX/ports/N/linkstate/loopback
What: /sys/class/infiniband/qibX/ports/N/linkstate/led_override
What: /sys/class/infiniband/qibX/ports/N/linkstate/hrtbt_enable
What: /sys/class/infiniband/qibX/ports/N/linkstate/status
What: /sys/class/infiniband/qibX/ports/N/linkstate/status_str
What: /sys/class/infiniband/qibX/ports/<N>/linkstate/loopback
What: /sys/class/infiniband/qibX/ports/<N>/linkstate/led_override
What: /sys/class/infiniband/qibX/ports/<N>/linkstate/hrtbt_enable
What: /sys/class/infiniband/qibX/ports/<N>/linkstate/status
What: /sys/class/infiniband/qibX/ports/<N>/linkstate/status_str
Date: May, 2010
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
@ -523,16 +523,16 @@ Description:
"Fatal_Hardware_Error".
=============== ===============================================
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rc_resends
What: /sys/class/infiniband/qibX/ports/N/diag_counters/seq_naks
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rdma_seq
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rnr_naks
What: /sys/class/infiniband/qibX/ports/N/diag_counters/other_naks
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rc_timeouts
What: /sys/class/infiniband/qibX/ports/N/diag_counters/look_pkts
What: /sys/class/infiniband/qibX/ports/N/diag_counters/pkt_drops
What: /sys/class/infiniband/qibX/ports/N/diag_counters/dma_wait
What: /sys/class/infiniband/qibX/ports/N/diag_counters/unaligned
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/rc_resends
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/seq_naks
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/rdma_seq
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/rnr_naks
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/other_naks
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/rc_timeouts
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/look_pkts
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/pkt_drops
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/dma_wait
What: /sys/class/infiniband/qibX/ports/<N>/diag_counters/unaligned
Date: May, 2010
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
@ -650,9 +650,9 @@ Description:
=============== =============================================
What: /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_settings_bin
What: /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_table_bin
What: /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_prescan
What: /sys/class/infiniband/hfi1_X/ports/<N>/CCMgtA/cc_settings_bin
What: /sys/class/infiniband/hfi1_X/ports/<N>/CCMgtA/cc_table_bin
What: /sys/class/infiniband/hfi1_X/ports/<N>/CCMgtA/cc_prescan
Date: May, 2016
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
@ -675,9 +675,9 @@ Description:
disable.
=============== ================================================
What: /sys/class/infiniband/hfi1_X/ports/N/sc2vl/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/N/sl2sc/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/N/vl2mtu/[0-15]
What: /sys/class/infiniband/hfi1_X/ports/<N>/sc2vl/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/<N>/sl2sc/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/<N>/vl2mtu/[0-15]
Date: May, 2016
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
@ -691,8 +691,8 @@ Description:
=============== ===================================================
What: /sys/class/infiniband/hfi1_X/sdma_N/cpu_list
What: /sys/class/infiniband/hfi1_X/sdma_N/vl
What: /sys/class/infiniband/hfi1_X/sdma_<N>/cpu_list
What: /sys/class/infiniband/hfi1_X/sdma_<N>/vl
Date: Sept, 2016
KernelVersion: v4.8
Contact: linux-rdma@vger.kernel.org

2
Documentation/ABI/stable/sysfs-class-tpm
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@ -195,7 +195,7 @@ Description: The "tpm_version_major" property shows the TCG spec major version
2
What: /sys/class/tpm/tpmX/pcr-H/N
What: /sys/class/tpm/tpmX/pcr-<H>/<N>
Date: March 2021
KernelVersion: 5.12
Contact: linux-integrity@vger.kernel.org

7
Documentation/ABI/stable/sysfs-devices
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@ -23,3 +23,10 @@ Contact: Device Tree mailing list <devicetree@vger.kernel.org>
Description:
If CONFIG_OF is enabled, then this file is present. When
read, it returns full name of the device node.
What: /sys/devices/*/dev
Date: Jun 2006
Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Description:
Major and minor numbers of the character device corresponding
to the device (in <major>:<minor> format).

25
Documentation/ABI/stable/sysfs-module
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@ -1,8 +1,7 @@
What: /sys/module
Description:
The /sys/module tree consists of the following structure:
The /sys/module tree consists of the following structure:
/sys/module/MODULENAME
What: /sys/module/<MODULENAME>
Description:
The name of the module that is in the kernel. This
module name will always show up if the module is loaded as a
dynamic module. If it is built directly into the kernel, it
@ -12,7 +11,8 @@ Description:
Note: The conditions of creation in the built-in case are not
by design and may be removed in the future.
/sys/module/MODULENAME/parameters
What: /sys/module/<MODULENAME>/parameters
Description:
This directory contains individual files that are each
individual parameters of the module that are able to be
changed at runtime. See the individual module
@ -25,10 +25,23 @@ Description:
individual driver documentation for details as to the
stability of the different parameters.
/sys/module/MODULENAME/refcnt
What: /sys/module/<MODULENAME>/refcnt
Description:
If the module is able to be unloaded from the kernel, this file
will contain the current reference count of the module.
Note: If the module is built into the kernel, or if the
CONFIG_MODULE_UNLOAD kernel configuration value is not enabled,
this file will not be present.
What: /sys/module/<MODULENAME>/srcversion
Date: Jun 2005
Description:
If the module source has MODULE_VERSION, this file will contain
the checksum of the the source code.
What: /sys/module/<MODULENAME>/version
Date: Jun 2005
Description:
If the module source has MODULE_VERSION, this file will contain
the version of the source code.

42
Documentation/ABI/testing/configfs-usb-gadget-uac1
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@ -4,23 +4,29 @@ KernelVersion: 4.14
Description:
The attributes:
========== ===================================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
c_mute_present capture mute control enable
===================== =======================================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
c_mute_present capture mute control enable
c_volume_present capture volume control enable
c_volume_min capture volume control min value (in 1/256 dB)
c_volume_max capture volume control max value (in 1/256 dB)
c_volume_res capture volume control resolution (in 1/256 dB)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
p_mute_present playback mute control enable
c_volume_min capture volume control min value
(in 1/256 dB)
c_volume_max capture volume control max value
(in 1/256 dB)
c_volume_res capture volume control resolution
(in 1/256 dB)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
p_mute_present playback mute control enable
p_volume_present playback volume control enable
p_volume_min playback volume control min value (in 1/256 dB)
p_volume_max playback volume control max value (in 1/256 dB)
p_volume_res playback volume control resolution (in 1/256 dB)
req_number the number of pre-allocated request
for both capture and playback
========== ===================================
p_volume_min playback volume control min value
(in 1/256 dB)
p_volume_max playback volume control max value
(in 1/256 dB)
p_volume_res playback volume control resolution
(in 1/256 dB)
req_number the number of pre-allocated request
for both capture and playback
===================== =======================================

43
Documentation/ABI/testing/configfs-usb-gadget-uac2
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@ -4,23 +4,30 @@ KernelVersion: 3.18
Description:
The attributes:
========= ============================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
c_sync capture synchronization type (async/adaptive)
c_mute_present capture mute control enable
===================== =======================================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
c_sync capture synchronization type
(async/adaptive)
c_mute_present capture mute control enable
c_volume_present capture volume control enable
c_volume_min capture volume control min value (in 1/256 dB)
c_volume_max capture volume control max value (in 1/256 dB)
c_volume_res capture volume control resolution (in 1/256 dB)
fb_max maximum extra bandwidth in async mode
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
p_mute_present playback mute control enable
c_volume_min capture volume control min value
(in 1/256 dB)
c_volume_max capture volume control max value
(in 1/256 dB)
c_volume_res capture volume control resolution
(in 1/256 dB)
fb_max maximum extra bandwidth in async mode
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
p_mute_present playback mute control enable
p_volume_present playback volume control enable
p_volume_min playback volume control min value (in 1/256 dB)
p_volume_max playback volume control max value (in 1/256 dB)
p_volume_res playback volume control resolution (in 1/256 dB)
========= ============================
p_volume_min playback volume control min value
(in 1/256 dB)
p_volume_max playback volume control max value
(in 1/256 dB)
p_volume_res playback volume control resolution
(in 1/256 dB)
===================== =======================================

5
Documentation/ABI/testing/evm
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@ -1,4 +1,5 @@
What: security/evm
What: /sys/kernel/security/evm
What: /sys/kernel/security/*/evm
Date: March 2011
Contact: Mimi Zohar <zohar@us.ibm.com>
Description:
@ -93,7 +94,7 @@ Description:
core/ima-setup) have support for loading keys at boot
time.
What: security/integrity/evm/evm_xattrs
What: /sys/kernel/security/*/evm/evm_xattrs
Date: April 2018
Contact: Matthew Garrett <mjg59@google.com>
Description:

2
Documentation/ABI/testing/ima_policy
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@ -1,4 +1,4 @@
What: security/ima/policy
What: /sys/kernel/security/*/ima/policy
Date: May 2008
Contact: Mimi Zohar <zohar@us.ibm.com>
Description:

3
Documentation/ABI/testing/pstore
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@ -1,4 +1,5 @@
What: /sys/fs/pstore/... (or /dev/pstore/...)
What: /sys/fs/pstore/...
What: /dev/pstore/...
Date: March 2011
KernelVersion: 2.6.39
Contact: tony.luck@intel.com

2
Documentation/ABI/testing/sysfs-ata
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@ -1,4 +1,4 @@
What: /sys/class/ata_...
What: /sys/class/ata_*
Description:
Provide a place in sysfs for storing the ATA topology of the
system. This allows retrieving various information about ATA

9
Documentation/ABI/testing/sysfs-bus-mdio
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@ -1,4 +1,5 @@
What: /sys/bus/mdio_bus/devices/.../statistics/
What: /sys/class/mdio_bus/.../statistics/
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -7,6 +8,7 @@ Description:
MDIO bus address statistics.
What: /sys/bus/mdio_bus/devices/.../statistics/transfers
What: /sys/class/mdio_bus/.../transfers
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -14,6 +16,7 @@ Description:
Total number of transfers for this MDIO bus.
What: /sys/bus/mdio_bus/devices/.../statistics/errors
What: /sys/class/mdio_bus/.../statistics/errors
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -21,6 +24,7 @@ Description:
Total number of transfer errors for this MDIO bus.
What: /sys/bus/mdio_bus/devices/.../statistics/writes
What: /sys/class/mdio_bus/.../statistics/writes
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -28,6 +32,7 @@ Description:
Total number of write transactions for this MDIO bus.
What: /sys/bus/mdio_bus/devices/.../statistics/reads
What: /sys/class/mdio_bus/.../statistics/reads
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -35,6 +40,7 @@ Description:
Total number of read transactions for this MDIO bus.
What: /sys/bus/mdio_bus/devices/.../statistics/transfers_<addr>
What: /sys/class/mdio_bus/.../statistics/transfers_<addr>
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -42,6 +48,7 @@ Description:
Total number of transfers for this MDIO bus address.
What: /sys/bus/mdio_bus/devices/.../statistics/errors_<addr>
What: /sys/class/mdio_bus/.../statistics/errors_<addr>
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -49,6 +56,7 @@ Description:
Total number of transfer errors for this MDIO bus address.
What: /sys/bus/mdio_bus/devices/.../statistics/writes_<addr>
What: /sys/class/mdio_bus/.../statistics/writes_<addr>
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org
@ -56,6 +64,7 @@ Description:
Total number of write transactions for this MDIO bus address.
What: /sys/bus/mdio_bus/devices/.../statistics/reads_<addr>
What: /sys/class/mdio_bus/.../statistics/reads_<addr>
Date: January 2020
KernelVersion: 5.6
Contact: netdev@vger.kernel.org

24
Documentation/ABI/testing/sysfs-bus-pci
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@ -1,4 +1,5 @@
What: /sys/bus/pci/drivers/.../bind
What: /sys/devices/pciX/.../bind
Date: December 2003
Contact: linux-pci@vger.kernel.org
Description:
@ -14,6 +15,7 @@ Description:
(Note: kernels before 2.6.28 may require echo -n).
What: /sys/bus/pci/drivers/.../unbind
What: /sys/devices/pciX/.../unbind
Date: December 2003
Contact: linux-pci@vger.kernel.org
Description:
@ -29,6 +31,7 @@ Description:
(Note: kernels before 2.6.28 may require echo -n).
What: /sys/bus/pci/drivers/.../new_id
What: /sys/devices/pciX/.../new_id
Date: December 2003
Contact: linux-pci@vger.kernel.org
Description:
@ -47,6 +50,7 @@ Description:
# echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
What: /sys/bus/pci/drivers/.../remove_id
What: /sys/devices/pciX/.../remove_id
Date: February 2009
Contact: Chris Wright <chrisw@sous-sol.org>
Description:
@ -160,7 +164,7 @@ Description:
If the underlying VPD has a writable section then the
corresponding section of this file will be writable.
What: /sys/bus/pci/devices/.../virtfnN
What: /sys/bus/pci/devices/.../virtfn<N>
Date: March 2009
Contact: Yu Zhao <yu.zhao@intel.com>
Description:
@ -187,6 +191,24 @@ Description:
The symbolic link points to the PCI device sysfs entry of the
Physical Function this device associates with.
What: /sys/bus/pci/devices/.../modalias
Date: May 2005
Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Description:
This attribute indicates the PCI ID of the device object.
That is in the format:
pci:vXXXXXXXXdXXXXXXXXsvXXXXXXXXsdXXXXXXXXbcXXscXXiXX,
where:
- vXXXXXXXX contains the vendor ID;
- dXXXXXXXX contains the device ID;
- svXXXXXXXX contains the sub-vendor ID;
- sdXXXXXXXX contains the subsystem device ID;
- bcXX contains the device class;
- scXX contains the device subclass;
- iXX contains the device class programming interface.
What: /sys/bus/pci/slots/.../module
Date: June 2009
Contact: linux-pci@vger.kernel.org

12
Documentation/ABI/testing/sysfs-bus-platform
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@ -42,3 +42,15 @@ Date: August 2021
Contact: Barry Song <song.bao.hua@hisilicon.com>
Description:
This attribute will show "msi" if <N> is a valid msi irq
What: /sys/bus/platform/devices/.../modalias
Description:
Same as MODALIAS in the uevent at device creation.
A platform device that it is exposed via devicetree uses:
- of:N`of node name`T`type`
Other platform devices use, instead:
- platform:`driver name`

32
Documentation/ABI/testing/sysfs-bus-rapidio
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@ -1,4 +1,4 @@
What: /sys/bus/rapidio/devices/nn:d:iiii
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>
Description:
For each RapidIO device, the RapidIO subsystem creates files in
an individual subdirectory with the following name format of
@ -29,7 +29,7 @@ Description:
Attributes Common for All RapidIO Devices
-----------------------------------------
What: /sys/bus/rapidio/devices/nn:d:iiii/did
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/did
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -37,7 +37,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) returns the device identifier
What: /sys/bus/rapidio/devices/nn:d:iiii/vid
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/vid
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -45,7 +45,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) returns the device vendor identifier
What: /sys/bus/rapidio/devices/nn:d:iiii/device_rev
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/device_rev
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -53,7 +53,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) returns the device revision level
What: /sys/bus/rapidio/devices/nn:d:iiii/asm_did
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/asm_did
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -61,7 +61,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) returns identifier for the assembly containing the device
What: /sys/bus/rapidio/devices/nn:d:iiii/asm_rev
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/asm_rev
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -70,7 +70,7 @@ Description:
(RO) returns revision level of the assembly containing the
device
What: /sys/bus/rapidio/devices/nn:d:iiii/asm_vid
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/asm_vid
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -79,7 +79,7 @@ Description:
(RO) returns vendor identifier of the assembly containing the
device
What: /sys/bus/rapidio/devices/nn:d:iiii/destid
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/destid
Date: Mar, 2011
KernelVersion: v2.6.3
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -88,7 +88,7 @@ Description:
(RO) returns device destination ID assigned by the enumeration
routine
What: /sys/bus/rapidio/devices/nn:d:iiii/lprev
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/lprev
Date: Mar, 2011
KernelVersion: v2.6.39
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -97,7 +97,7 @@ Description:
(RO) returns name of previous device (switch) on the path to the
device that that owns this attribute
What: /sys/bus/rapidio/devices/nn:d:iiii/modalias
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/modalias
Date: Jul, 2013
KernelVersion: v3.11
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -105,7 +105,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) returns the device modalias
What: /sys/bus/rapidio/devices/nn:d:iiii/config
What: /sys/bus/rapidio/devices/<nn>:<d>:<iiii>/config
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -128,7 +128,7 @@ device-specific sysfs attributes by specifying a callback function that may be
set by the switch initialization routine during enumeration or discovery
process.
What: /sys/bus/rapidio/devices/nn:s:iiii/routes
What: /sys/bus/rapidio/devices/<nn>:<s>:<iiii>/routes
Date: Nov, 2005
KernelVersion: v2.6.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -138,7 +138,7 @@ Description:
This attribute reports only valid routing table entries, one
line for each entry.
What: /sys/bus/rapidio/devices/nn:s:iiii/destid
What: /sys/bus/rapidio/devices/<nn>:<s>:<iiii>/destid
Date: Mar, 2011
KernelVersion: v2.6.3
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -147,7 +147,7 @@ Description:
(RO) device destination ID of the associated device that defines
a route to the switch
What: /sys/bus/rapidio/devices/nn:s:iiii/hopcount
What: /sys/bus/rapidio/devices/<nn>:<s>:<iiii>/hopcount
Date: Mar, 2011
KernelVersion: v2.6.39
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -155,7 +155,7 @@ Contact: Matt Porter <mporter@kernel.crashing.org>,
Description:
(RO) number of hops on the path to the switch
What: /sys/bus/rapidio/devices/nn:s:iiii/lnext
What: /sys/bus/rapidio/devices/<nn>:<s>:<iiii>/lnext
Date: Mar, 2011
KernelVersion: v2.6.39
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -172,7 +172,7 @@ Device-specific Switch Attributes
IDT_GEN2-
What: /sys/bus/rapidio/devices/nn:s:iiii/errlog
What: /sys/bus/rapidio/devices/<nn>:<s>:<iiii>/errlog
Date: Oct, 2010
KernelVersion: v2.6.37
Contact: Matt Porter <mporter@kernel.crashing.org>,

292
Documentation/ABI/testing/sysfs-bus-usb
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@ -1,4 +1,4 @@
What: /sys/bus/usb/devices/INTERFACE/authorized
What: /sys/bus/usb/devices/<INTERFACE>/authorized
Date: August 2015
Description:
This allows to authorize (1) or deauthorize (0)
@ -166,14 +166,14 @@ Description:
The file will be present for all speeds of USB devices, and will
always read "no" for USB 1.1 and USB 2.0 devices.
What: /sys/bus/usb/devices/.../(hub interface)/portX
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>
Date: August 2012
Contact: Lan Tianyu <tianyu.lan@intel.com>
Description:
The /sys/bus/usb/devices/.../(hub interface)/portX
The /sys/bus/usb/devices/.../<hub_interface>/port<X>
is usb port device's sysfs directory.
What: /sys/bus/usb/devices/.../(hub interface)/portX/connect_type
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/connect_type
Date: January 2013
Contact: Lan Tianyu <tianyu.lan@intel.com>
Description:
@ -182,7 +182,7 @@ Description:
The file will read "hotplug", "hardwired" and "not used" if the
information is available, and "unknown" otherwise.
What: /sys/bus/usb/devices/.../(hub interface)/portX/location
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/location
Date: October 2018
Contact: Bjørn Mork <bjorn@mork.no>
Description:
@ -192,7 +192,7 @@ Description:
raw location value as a hex integer.
What: /sys/bus/usb/devices/.../(hub interface)/portX/quirks
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/quirks
Date: May 2018
Contact: Nicolas Boichat <drinkcat@chromium.org>
Description:
@ -216,7 +216,7 @@ Description:
used to help make enumeration work better on some high speed
devices.
What: /sys/bus/usb/devices/.../(hub interface)/portX/over_current_count
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/over_current_count
Date: February 2018
Contact: Richard Leitner <richard.leitner@skidata.com>
Description:
@ -230,10 +230,10 @@ Description:
Any time this value changes the corresponding hub device will send a
udev event with the following attributes::
OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX
OVER_CURRENT_PORT=/sys/bus/usb/devices/.../<hub_interface>/port<X>
OVER_CURRENT_COUNT=[current value of this sysfs attribute]
What: /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit
What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/usb3_lpm_permit
Date: November 2015
Contact: Lu Baolu <baolu.lu@linux.intel.com>
Description:
@ -288,3 +288,277 @@ Description:
USB 3.2 adds Dual-lane support, 2 rx and 2 tx -lanes over Type-C.
Inter-Chip SSIC devices support asymmetric lanes up to 4 lanes per
direction. Devices before USB 3.2 are single lane (tx_lanes = 1)
What: /sys/bus/usb/devices/usbX/bAlternateSetting
Description:
The current interface alternate setting number, in decimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bcdDevice
Description:
The device's release number, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bConfigurationValue
Description:
While a USB device typically have just one configuration
setting, some devices support multiple configurations.
This value shows the current configuration, in decimal.
Changing its value will change the device's configuration
to another setting.
The number of configurations supported by a device is at:
/sys/bus/usb/devices/usbX/bNumConfigurations
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bDeviceClass
Description:
Class code of the device, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bDeviceProtocol
Description:
Protocol code of the device, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bDeviceSubClass
Description:
Subclass code of the device, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bInterfaceClass
Description:
Class code of the interface, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bInterfaceNumber
Description:
Interface number, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bInterfaceProtocol
Description:
Protocol code of the interface, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bInterfaceSubClass
Description:
Subclass code of the interface, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bmAttributes
Description:
Attributes of the current configuration, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bMaxPacketSize0
Description:
Maximum endpoint 0 packet size, in decimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bMaxPower
Description:
Maximum power consumption of the active configuration of
the device, in miliamperes.
What: /sys/bus/usb/devices/usbX/bNumConfigurations
Description:
Number of the possible configurations of the device, in
decimal. The current configuration is controlled via:
/sys/bus/usb/devices/usbX/bConfigurationValue
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bNumEndpoints
Description:
Number of endpoints used on this interface, in hexadecimal.
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/bNumInterfaces
Description:
Number of interfaces on this device, in decimal.
What: /sys/bus/usb/devices/usbX/busnum
Description:
Number of the bus.
What: /sys/bus/usb/devices/usbX/configuration
Description:
Contents of the string descriptor associated with the
current configuration. It may include the firmware version
of a device and/or its serial number.
What: /sys/bus/usb/devices/usbX/descriptors
Description:
Contains the interface descriptors, in binary.
What: /sys/bus/usb/devices/usbX/idProduct
Description:
Product ID, in hexadecimal.
What: /sys/bus/usb/devices/usbX/idVendor
Description:
Vendor ID, in hexadecimal.
What: /sys/bus/usb/devices/usbX/devspec
Description:
Displays the Device Tree Open Firmware node of the interface.
What: /sys/bus/usb/devices/usbX/avoid_reset_quirk
Description:
Most devices have this set to zero.
If the value is 1, enable a USB quirk that prevents this
device to use reset.
(read/write)
What: /sys/bus/usb/devices/usbX/devnum
Description:
USB interface device number, in decimal.
What: /sys/bus/usb/devices/usbX/devpath
Description:
String containing the USB interface device path.
What: /sys/bus/usb/devices/usbX/manufacturer
Description:
Vendor specific string containing the name of the
manufacturer of the device.
What: /sys/bus/usb/devices/usbX/maxchild
Description:
Number of ports of an USB hub
What: /sys/bus/usb/devices/usbX/persist
Description:
Keeps the device even if it gets disconnected.
What: /sys/bus/usb/devices/usbX/product
Description:
Vendor specific string containing the name of the
device's product.
What: /sys/bus/usb/devices/usbX/speed
Description:
Shows the device's max speed, according to the USB version,
in Mbps.
Can be:
======= ====================
Unknown speed unknown
1.5 Low speed
15 Full speed
480 High Speed
5000 Super Speed
10000 Super Speed+
20000 Super Speed+ Gen 2x2
======= ====================
What: /sys/bus/usb/devices/usbX/supports_autosuspend
Description:
Returns 1 if the device doesn't support autosuspend.
Otherwise, returns 0.
What: /sys/bus/usb/devices/usbX/urbnum
Description:
Number of URBs submitted for the whole device.
What: /sys/bus/usb/devices/usbX/version
Description:
String containing the USB device version, as encoded
at the BCD descriptor.
What: /sys/bus/usb/devices/usbX/power/autosuspend
Description:
Time in milliseconds for the device to autosuspend. If the
value is negative, then autosuspend is prevented.
(read/write)
What: /sys/bus/usb/devices/usbX/power/active_duration
Description:
The total time the device has not been suspended.
What: /sys/bus/usb/devices/usbX/power/connected_duration
Description:
The total time (in msec) that the device has been connected.
What: /sys/bus/usb/devices/usbX/power/level
Description:
What: /sys/bus/usb/devices/usbX/ep_<N>/bEndpointAddress
Description:
The address of the endpoint described by this descriptor,
in hexadecimal. The endpoint direction on this bitmapped field
is also shown at:
/sys/bus/usb/devices/usbX/ep_<N>/direction
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/ep_<N>/bInterval
Description:
The interval of the endpoint as described on its descriptor,
in hexadecimal. The actual interval depends on the version
of the USB. Also shown in time units at
/sys/bus/usb/devices/usbX/ep_<N>/interval.
What: /sys/bus/usb/devices/usbX/ep_<N>/bLength
Description:
Number of bytes of the endpoint descriptor, in hexadecimal.
What: /sys/bus/usb/devices/usbX/ep_<N>/bmAttributes
Description:
Attributes which apply to the endpoint as described on its
descriptor, in hexadecimal. The endpoint type on this
bitmapped field is also shown at:
/sys/bus/usb/devices/usbX/ep_<N>/type
See USB specs for its meaning.
What: /sys/bus/usb/devices/usbX/ep_<N>/direction
Description:
Direction of the endpoint. Can be:
- both (on control endpoints)
- in
- out
What: /sys/bus/usb/devices/usbX/ep_<N>/interval
Description:
Interval for polling endpoint for data transfers, in
milisseconds or microseconds.
What: /sys/bus/usb/devices/usbX/ep_<N>/type
Description:
Descriptor type. Can be:
- Control
- Isoc
- Bulk
- Interrupt
- unknown
What: /sys/bus/usb/devices/usbX/ep_<N>/wMaxPacketSize
Description:
Maximum packet size this endpoint is capable of
sending or receiving, in hexadecimal.

30
Documentation/ABI/testing/sysfs-class-bdi
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@ -23,14 +23,17 @@ default
The default backing dev, used for non-block device backed
filesystems which do not provide their own BDI.
Files under /sys/class/bdi/<bdi>/
read_ahead_kb (read-write)
What: /sys/class/bdi/<bdi>/read_ahead_kb
Date: January 2008
Contact: Peter Zijlstra <a.p.zijlstra@chello.nl>
Description:
Size of the read-ahead window in kilobytes
min_ratio (read-write)
(read-write)
What: /sys/class/bdi/<bdi>/min_ratio
Date: January 2008
Contact: Peter Zijlstra <a.p.zijlstra@chello.nl>
Description:
Under normal circumstances each device is given a part of the
total write-back cache that relates to its current average
writeout speed in relation to the other devices.
@ -39,8 +42,12 @@ min_ratio (read-write)
percentage of the write-back cache to a particular device.
For example, this is useful for providing a minimum QoS.
max_ratio (read-write)
(read-write)
What: /sys/class/bdi/<bdi>/max_ratio
Date: January 2008
Contact: Peter Zijlstra <a.p.zijlstra@chello.nl>
Description:
Allows limiting a particular device to use not more than the
given percentage of the write-back cache. This is useful in
situations where we want to avoid one device taking all or
@ -48,7 +55,12 @@ max_ratio (read-write)
mount that is prone to get stuck, or a FUSE mount which cannot
be trusted to play fair.
stable_pages_required (read-only)
(read-write)
What: /sys/class/bdi/<bdi>/stable_pages_required
Date: January 2008
Contact: Peter Zijlstra <a.p.zijlstra@chello.nl>
Description:
If set, the backing device requires that all pages comprising a write
request must not be changed until writeout is complete.
(read-only)

15
Documentation/ABI/testing/sysfs-class-cxl
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@ -166,10 +166,11 @@ Description: read only
Decimal value of the Per Process MMIO space length.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>m/pp_mmio_off (not in a guest)
What: /sys/class/cxl/<afu>m/pp_mmio_off
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
(not in a guest)
Decimal value of the Per Process MMIO space offset.
Users: https://github.com/ibm-capi/libcxl
@ -190,28 +191,31 @@ Description: read only
Identifies the revision level of the PSL.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/base_image (not in a guest)
What: /sys/class/cxl/<card>/base_image
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
(not in a guest)
Identifies the revision level of the base image for devices
that support loadable PSLs. For FPGAs this field identifies
the image contained in the on-adapter flash which is loaded
during the initial program load.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/image_loaded (not in a guest)
What: /sys/class/cxl/<card>/image_loaded
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
(not in a guest)
Will return "user" or "factory" depending on the image loaded
onto the card.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/load_image_on_perst (not in a guest)
What: /sys/class/cxl/<card>/load_image_on_perst
Date: December 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read/write
(not in a guest)
Valid entries are "none", "user", and "factory".
"none" means PERST will not cause image to be loaded to the
card. A power cycle is required to load the image.
@ -235,10 +239,11 @@ Description: write only
contexts on the card AFUs.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/perst_reloads_same_image (not in a guest)
What: /sys/class/cxl/<card>/perst_reloads_same_image
Date: July 2015
Contact: linuxppc-dev@lists.ozlabs.org
Description: read/write
(not in a guest)
Trust that when an image is reloaded via PERST, it will not
have changed.

12
Documentation/ABI/testing/sysfs-class-devfreq-event
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@ -1,25 +1,25 @@
What: /sys/class/devfreq-event/event(x)/
What: /sys/class/devfreq-event/event<x>/
Date: January 2017
Contact: Chanwoo Choi <cw00.choi@samsung.com>
Description:
Provide a place in sysfs for the devfreq-event objects.
This allows accessing various devfreq-event specific variables.
The name of devfreq-event object denoted as 'event(x)' which
The name of devfreq-event object denoted as 'event<x>' which
includes the unique number of 'x' for each devfreq-event object.
What: /sys/class/devfreq-event/event(x)/name
What: /sys/class/devfreq-event/event<x>/name
Date: January 2017
Contact: Chanwoo Choi <cw00.choi@samsung.com>
Description:
The /sys/class/devfreq-event/event(x)/name attribute contains
The /sys/class/devfreq-event/event<x>/name attribute contains
the name of the devfreq-event object. This attribute is
read-only.
What: /sys/class/devfreq-event/event(x)/enable_count
What: /sys/class/devfreq-event/event<x>/enable_count
Date: January 2017
Contact: Chanwoo Choi <cw00.choi@samsung.com>
Description:
The /sys/class/devfreq-event/event(x)/enable_count attribute
The /sys/class/devfreq-event/event<x>/enable_count attribute
contains the reference count to enable the devfreq-event
object. If the device is enabled, the value of attribute is
greater than zero.

12
Documentation/ABI/testing/sysfs-class-extcon
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@ -65,19 +65,19 @@ Description:
interface associated with each cable cannot update
multiple cable states of an extcon device simultaneously.
What: /sys/class/extcon/.../cable.x/name
What: /sys/class/extcon/.../cable.X/name
Date: February 2012
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/extcon/.../cable.x/name shows the name of cable
"x" (integer between 0 and 31) of an extcon device.
The /sys/class/extcon/.../cable.X/name shows the name of cable
"X" (integer between 0 and 31) of an extcon device.
What: /sys/class/extcon/.../cable.x/state
What: /sys/class/extcon/.../cable.X/state
Date: February 2012
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/extcon/.../cable.x/state shows and stores the
state of cable "x" (integer between 0 and 31) of an extcon
The /sys/class/extcon/.../cable.X/state shows and stores the
state of cable "X" (integer between 0 and 31) of an extcon
device. The state value is either 0 (detached) or 1
(attached).

2
Documentation/ABI/testing/sysfs-class-gnss
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@ -1,4 +1,4 @@
What: /sys/class/gnss/gnssN/type
What: /sys/class/gnss/gnss<N>/type
Date: May 2018
KernelVersion: 4.18
Contact: Johan Hovold <johan@kernel.org>

932
Documentation/ABI/testing/sysfs-class-hwmon Normal file
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@ -0,0 +1,932 @@
What: /sys/class/hwmon/hwmonX/name
Description:
The chip name.
This should be a short, lowercase string, not containing
whitespace, dashes, or the wildcard character '*'.
This attribute represents the chip name. It is the only
mandatory attribute.
I2C devices get this attribute created automatically.
RO
What: /sys/class/hwmon/hwmonX/update_interval
Description:
The interval at which the chip will update readings.
Unit: millisecond
RW
Some devices have a variable update rate or interval.
This attribute can be used to change it to the desired value.
What: /sys/class/hwmon/hwmonX/inY_min
Description:
Voltage min value.
Unit: millivolt
RW
What: /sys/class/hwmon/hwmonX/inY_lcrit
Description:
Voltage critical min value.
Unit: millivolt
RW
If voltage drops to or below this limit, the system may
take drastic action such as power down or reset. At the very
least, it should report a fault.
What: /sys/class/hwmon/hwmonX/inY_max
Description:
Voltage max value.
Unit: millivolt
RW
What: /sys/class/hwmon/hwmonX/inY_crit
Description:
Voltage critical max value.
Unit: millivolt
RW
If voltage reaches or exceeds this limit, the system may
take drastic action such as power down or reset. At the very
least, it should report a fault.
What: /sys/class/hwmon/hwmonX/inY_input
Description:
Voltage input value.
Unit: millivolt
RO
Voltage measured on the chip pin.
Actual voltage depends on the scaling resistors on the
motherboard, as recommended in the chip datasheet.
This varies by chip and by motherboard.
Because of this variation, values are generally NOT scaled
by the chip driver, and must be done by the application.
However, some drivers (notably lm87 and via686a)
do scale, because of internal resistors built into a chip.
These drivers will output the actual voltage. Rule of
thumb: drivers should report the voltage values at the
"pins" of the chip.
What: /sys/class/hwmon/hwmonX/inY_average
Description:
Average voltage
Unit: millivolt
RO
What: /sys/class/hwmon/hwmonX/inY_lowest
Description:
Historical minimum voltage
Unit: millivolt
RO
What: /sys/class/hwmon/hwmonX/inY_highest
Description:
Historical maximum voltage
Unit: millivolt
RO
What: /sys/class/hwmon/hwmonX/inY_reset_history
Description:
Reset inX_lowest and inX_highest
WO
What: /sys/class/hwmon/hwmonX/in_reset_history
Description:
Reset inX_lowest and inX_highest for all sensors
WO
What: /sys/class/hwmon/hwmonX/inY_label
Description:
Suggested voltage channel label.
Text string
Should only be created if the driver has hints about what
this voltage channel is being used for, and user-space
doesn't. In all other cases, the label is provided by
user-space.
RO
What: /sys/class/hwmon/hwmonX/inY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/cpuY_vid
Description:
CPU core reference voltage.
Unit: millivolt
RO
Not always correct.
What: /sys/class/hwmon/hwmonX/vrm
Description:
Voltage Regulator Module version number.
RW (but changing it should no more be necessary)
Originally the VRM standard version multiplied by 10, but now
an arbitrary number, as not all standards have a version
number.
Affects the way the driver calculates the CPU core reference
voltage from the vid pins.
What: /sys/class/hwmon/hwmonX/inY_rated_min
Description:
Minimum rated voltage.
Unit: millivolt
RO
What: /sys/class/hwmon/hwmonX/inY_rated_max
Description:
Maximum rated voltage.
Unit: millivolt
RO
What: /sys/class/hwmon/hwmonX/fanY_min
Description:
Fan minimum value
Unit: revolution/min (RPM)
RW
What: /sys/class/hwmon/hwmonX/fanY_max
Description:
Fan maximum value
Unit: revolution/min (RPM)
Only rarely supported by the hardware.
RW
What: /sys/class/hwmon/hwmonX/fanY_input
Description:
Fan input value.
Unit: revolution/min (RPM)
RO
What: /sys/class/hwmon/hwmonX/fanY_div
Description:
Fan divisor.
Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
RW
Some chips only support values 1, 2, 4 and 8.
Note that this is actually an internal clock divisor, which
affects the measurable speed range, not the read value.
What: /sys/class/hwmon/hwmonX/fanY_pulses
Description:
Number of tachometer pulses per fan revolution.
Integer value, typically between 1 and 4.
RW
This value is a characteristic of the fan connected to the
device's input, so it has to be set in accordance with the fan
model.
Should only be created if the chip has a register to configure
the number of pulses. In the absence of such a register (and
thus attribute) the value assumed by all devices is 2 pulses
per fan revolution.
What: /sys/class/hwmon/hwmonX/fanY_target
Description:
Desired fan speed
Unit: revolution/min (RPM)
RW
Only makes sense if the chip supports closed-loop fan speed
control based on the measured fan speed.
What: /sys/class/hwmon/hwmonX/fanY_label
Description:
Suggested fan channel label.
Text string
Should only be created if the driver has hints about what
this fan channel is being used for, and user-space doesn't.
In all other cases, the label is provided by user-space.
RO
What: /sys/class/hwmon/hwmonX/fanY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/pwmY
Description:
Pulse width modulation fan control.
Integer value in the range 0 to 255
RW
255 is max or 100%.
What: /sys/class/hwmon/hwmonX/pwmY_enable
Description:
Fan speed control method:
- 0: no fan speed control (i.e. fan at full speed)
- 1: manual fan speed control enabled (using `pwmY`)
- 2+: automatic fan speed control enabled
Check individual chip documentation files for automatic mode
details.
RW
What: /sys/class/hwmon/hwmonX/pwmY_mode
Description:
- 0: DC mode (direct current)
- 1: PWM mode (pulse-width modulation)
RW
What: /sys/class/hwmon/hwmonX/pwmY_freq
Description:
Base PWM frequency in Hz.
Only possibly available when pwmN_mode is PWM, but not always
present even then.
RW
What: /sys/class/hwmon/hwmonX/pwmY_auto_channels_temp
Description:
Select which temperature channels affect this PWM output in
auto mode.
Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
Which values are possible depend on the chip used.
RW
What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_pwm
What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp
What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp_hyst
Description:
Define the PWM vs temperature curve.
Number of trip points is chip-dependent. Use this for chips
which associate trip points to PWM output channels.
RW
What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_pwm
What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp
What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp_hyst
Description:
Define the PWM vs temperature curve.
Number of trip points is chip-dependent. Use this for chips
which associate trip points to temperature channels.
RW
What: /sys/class/hwmon/hwmonX/tempY_type
Description:
Sensor type selection.
Integers 1 to 6
RW
- 1: CPU embedded diode
- 2: 3904 transistor
- 3: thermal diode
- 4: thermistor
- 5: AMD AMDSI
- 6: Intel PECI
Not all types are supported by all chips
What: /sys/class/hwmon/hwmonX/tempY_max
Description:
Temperature max value.
Unit: millidegree Celsius (or millivolt, see below)
RW
What: /sys/class/hwmon/hwmonX/tempY_min
Description:
Temperature min value.
Unit: millidegree Celsius
RW
What: /sys/class/hwmon/hwmonX/tempY_max_hyst
Description:
Temperature hysteresis value for max limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the max value.
RW
What: /sys/class/hwmon/hwmonX/tempY_min_hyst
Description:
Temperature hysteresis value for min limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the min value.
RW
What: /sys/class/hwmon/hwmonX/tempY_input
Description:
Temperature input value.
Unit: millidegree Celsius
RO
What: /sys/class/hwmon/hwmonX/tempY_crit
Description:
Temperature critical max value, typically greater than
corresponding temp_max values.
Unit: millidegree Celsius
RW
What: /sys/class/hwmon/hwmonX/tempY_crit_alarm
Description:
Critical high temperature alarm flag.
- 0: OK
- 1: temperature has reached tempY_crit
RW
Contrary to regular alarm flags which clear themselves
automatically when read, this one sticks until cleared by
the user. This is done by writing 0 to the file. Writing
other values is unsupported.
What: /sys/class/hwmon/hwmonX/tempY_crit_hyst
Description:
Temperature hysteresis value for critical limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the critical value.
RW
What: /sys/class/hwmon/hwmonX/tempY_emergency
Description:
Temperature emergency max value, for chips supporting more than
two upper temperature limits. Must be equal or greater than
corresponding temp_crit values.
Unit: millidegree Celsius
RW
What: /sys/class/hwmon/hwmonX/tempY_emergency_hyst
Description:
Temperature hysteresis value for emergency limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the emergency value.
RW
What: /sys/class/hwmon/hwmonX/tempY_lcrit
Description:
Temperature critical min value, typically lower than
corresponding temp_min values.
Unit: millidegree Celsius
RW
What: /sys/class/hwmon/hwmonX/tempY_lcrit_hyst
Description:
Temperature hysteresis value for critical min limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the critical min value.
RW
What: /sys/class/hwmon/hwmonX/tempY_offset
Description:
Temperature offset which is added to the temperature reading
by the chip.
Unit: millidegree Celsius
Read/Write value.
What: /sys/class/hwmon/hwmonX/tempY_label
Description:
Suggested temperature channel label.
Text string
Should only be created if the driver has hints about what
this temperature channel is being used for, and user-space
doesn't. In all other cases, the label is provided by
user-space.
RO
What: /sys/class/hwmon/hwmonX/tempY_lowest
Description:
Historical minimum temperature
Unit: millidegree Celsius
RO
What: /sys/class/hwmon/hwmonX/tempY_highest
Description:
Historical maximum temperature
Unit: millidegree Celsius
RO
What: /sys/class/hwmon/hwmonX/tempY_reset_history
Description:
Reset temp_lowest and temp_highest
WO
What: /sys/class/hwmon/hwmonX/temp_reset_history
Description:
Reset temp_lowest and temp_highest for all sensors
WO
What: /sys/class/hwmon/hwmonX/tempY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/tempY_rated_min
Description:
Minimum rated temperature.
Unit: millidegree Celsius
RO
What: /sys/class/hwmon/hwmonX/tempY_rated_max
Description:
Maximum rated temperature.
Unit: millidegree Celsius
RO
What: /sys/class/hwmon/hwmonX/currY_max
Description:
Current max value
Unit: milliampere
RW
What: /sys/class/hwmon/hwmonX/currY_min
Description:
Current min value.
Unit: milliampere
RW
What: /sys/class/hwmon/hwmonX/currY_lcrit
Description:
Current critical low value
Unit: milliampere
RW
What: /sys/class/hwmon/hwmonX/currY_crit
Description:
Current critical high value.
Unit: milliampere
RW
What: /sys/class/hwmon/hwmonX/currY_input
Description:
Current input value
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/currY_average
Description:
Average current use
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/currY_lowest
Description:
Historical minimum current
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/currY_highest
Description:
Historical maximum current
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/currY_reset_history
Description:
Reset currX_lowest and currX_highest
WO
What: /sys/class/hwmon/hwmonX/curr_reset_history
Description:
Reset currX_lowest and currX_highest for all sensors
WO
What: /sys/class/hwmon/hwmonX/currY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/currY_rated_min
Description:
Minimum rated current.
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/currY_rated_max
Description:
Maximum rated current.
Unit: milliampere
RO
What: /sys/class/hwmon/hwmonX/powerY_average
Description:
Average power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_average_interval
Description:
Power use averaging interval. A poll
notification is sent to this file if the
hardware changes the averaging interval.
Unit: milliseconds
RW
What: /sys/class/hwmon/hwmonX/powerY_average_interval_max
Description:
Maximum power use averaging interval
Unit: milliseconds
RO
What: /sys/class/hwmon/hwmonX/powerY_average_interval_min
Description:
Minimum power use averaging interval
Unit: milliseconds
RO
What: /sys/class/hwmon/hwmonX/powerY_average_highest
Description:
Historical average maximum power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_average_lowest
Description:
Historical average minimum power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_average_max
Description:
A poll notification is sent to
`powerY_average` when power use
rises above this value.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_average_min
Description:
A poll notification is sent to
`powerY_average` when power use
sinks below this value.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_input
Description:
Instantaneous power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_input_highest
Description:
Historical maximum power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_input_lowest
Description:
Historical minimum power use
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_reset_history
Description:
Reset input_highest, input_lowest,
average_highest and average_lowest.
WO
What: /sys/class/hwmon/hwmonX/powerY_accuracy
Description:
Accuracy of the power meter.
Unit: Percent
RO
What: /sys/class/hwmon/hwmonX/powerY_cap
Description:
If power use rises above this limit, the
system should take action to reduce power use.
A poll notification is sent to this file if the
cap is changed by the hardware. The `*_cap`
files only appear if the cap is known to be
enforced by hardware.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_cap_hyst
Description:
Margin of hysteresis built around capping and
notification.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_cap_max
Description:
Maximum cap that can be set.
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_cap_min
Description:
Minimum cap that can be set.
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_max
Description:
Maximum power.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_crit
Description:
Critical maximum power.
If power rises to or above this limit, the
system is expected take drastic action to reduce
power consumption, such as a system shutdown or
a forced powerdown of some devices.
Unit: microWatt
RW
What: /sys/class/hwmon/hwmonX/powerY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return
-ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/powerY_rated_min
Description:
Minimum rated power.
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/powerY_rated_max
Description:
Maximum rated power.
Unit: microWatt
RO
What: /sys/class/hwmon/hwmonX/energyY_input
Description:
Cumulative energy use
Unit: microJoule
RO
What: /sys/class/hwmon/hwmonX/energyY_enable
Description:
Enable or disable the sensors.
When disabled the sensor read will return
-ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/humidityY_input
Description:
Humidity
Unit: milli-percent (per cent mille, pcm)
RO
What: /sys/class/hwmon/hwmonX/humidityY_enable
Description:
Enable or disable the sensors
When disabled the sensor read will return
-ENODATA.
- 1: Enable
- 0: Disable
RW
What: /sys/class/hwmon/hwmonX/humidityY_rated_min
Description:
Minimum rated humidity.
Unit: milli-percent (per cent mille, pcm)
RO
What: /sys/class/hwmon/hwmonX/humidityY_rated_max
Description:
Maximum rated humidity.
Unit: milli-percent (per cent mille, pcm)
RO
What: /sys/class/hwmon/hwmonX/intrusionY_alarm
Description:
Chassis intrusion detection
- 0: OK
- 1: intrusion detected
RW
Contrary to regular alarm flags which clear themselves
automatically when read, this one sticks until cleared by
the user. This is done by writing 0 to the file. Writing
other values is unsupported.
What: /sys/class/hwmon/hwmonX/intrusionY_beep
Description:
Chassis intrusion beep
- 0: disable
- 1: enable
RW

18
Documentation/ABI/testing/sysfs-class-mei
Просмотреть файл

@ -6,7 +6,7 @@ Description:
The mei/ class sub-directory belongs to mei device class
What: /sys/class/mei/meiN/
What: /sys/class/mei/mei<N>/
Date: May 2014
KernelVersion: 3.17
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -14,7 +14,7 @@ Description:
The /sys/class/mei/meiN directory is created for
each probed mei device
What: /sys/class/mei/meiN/fw_status
What: /sys/class/mei/mei<N>/fw_status
Date: Nov 2014
KernelVersion: 3.19
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -29,7 +29,7 @@ Description: Display fw status registers content
Also number of registers varies between 1 and 6
depending on generation.
What: /sys/class/mei/meiN/hbm_ver
What: /sys/class/mei/mei<N>/hbm_ver
Date: Aug 2016
KernelVersion: 4.9
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -38,7 +38,7 @@ Description: Display the negotiated HBM protocol version.
The HBM protocol version negotiated
between the driver and the device.
What: /sys/class/mei/meiN/hbm_ver_drv
What: /sys/class/mei/mei<N>/hbm_ver_drv
Date: Aug 2016
KernelVersion: 4.9
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -46,7 +46,7 @@ Description: Display the driver HBM protocol version.
The HBM protocol version supported by the driver.
What: /sys/class/mei/meiN/tx_queue_limit
What: /sys/class/mei/mei<N>/tx_queue_limit
Date: Jan 2018
KernelVersion: 4.16
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -55,7 +55,7 @@ Description: Configure tx queue limit
Set maximal number of pending writes
per opened session.
What: /sys/class/mei/meiN/fw_ver
What: /sys/class/mei/mei<N>/fw_ver
Date: May 2018
KernelVersion: 4.18
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -66,7 +66,7 @@ Description: Display the ME firmware version.
There can be up to three such blocks for different
FW components.
What: /sys/class/mei/meiN/dev_state
What: /sys/class/mei/mei<N>/dev_state
Date: Mar 2019
KernelVersion: 5.1
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -81,7 +81,7 @@ Description: Display the ME device state.
POWER_DOWN
POWER_UP
What: /sys/class/mei/meiN/trc
What: /sys/class/mei/mei<N>/trc
Date: Nov 2019
KernelVersion: 5.5
Contact: Tomas Winkler <tomas.winkler@intel.com>
@ -91,7 +91,7 @@ Description: Display trc status register content
status information into trc status register
for BIOS and OS to monitor fw health.
What: /sys/class/mei/meiN/kind
What: /sys/class/mei/mei<N>/kind
Date: Jul 2020
KernelVersion: 5.8
Contact: Tomas Winkler <tomas.winkler@intel.com>

24
Documentation/ABI/testing/sysfs-class-mic
Просмотреть файл

@ -8,7 +8,7 @@ Description:
PCIe form factor add-in Coprocessor card based on the Intel Many
Integrated Core (MIC) architecture that runs a Linux OS.
What: /sys/class/mic/mic(x)
What: /sys/class/mic/mic<X>
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -17,7 +17,7 @@ Description:
represent MIC devices (0,1,..etc). Each directory has
information specific to that MIC device.
What: /sys/class/mic/mic(x)/family
What: /sys/class/mic/mic<X>/family
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -25,7 +25,7 @@ Description:
Provides information about the Coprocessor family for an Intel
MIC device. For example - "x100"
What: /sys/class/mic/mic(x)/stepping
What: /sys/class/mic/mic<X>/stepping
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -33,7 +33,7 @@ Description:
Provides information about the silicon stepping for an Intel
MIC device. For example - "A0" or "B0"
What: /sys/class/mic/mic(x)/state
What: /sys/class/mic/mic<X>/state
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -69,7 +69,7 @@ Description:
"shutdown" Initiates card OS shutdown.
========== ===================================================
What: /sys/class/mic/mic(x)/shutdown_status
What: /sys/class/mic/mic<X>/shutdown_status
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -88,7 +88,7 @@ Description:
"restart" Shutdown because of a restart command.
========== ===================================================
What: /sys/class/mic/mic(x)/cmdline
What: /sys/class/mic/mic<X>/cmdline
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -104,7 +104,7 @@ Description:
or modify existing ones and then write the whole kernel command
line back to this entry.
What: /sys/class/mic/mic(x)/firmware
What: /sys/class/mic/mic<X>/firmware
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -114,7 +114,7 @@ Description:
card can be found. The entry can be written to change the
firmware image location under /lib/firmware/.
What: /sys/class/mic/mic(x)/ramdisk
What: /sys/class/mic/mic<X>/ramdisk
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -124,7 +124,7 @@ Description:
OS boot can be found. The entry can be written to change
the ramdisk image location under /lib/firmware/.
What: /sys/class/mic/mic(x)/bootmode
What: /sys/class/mic/mic<X>/bootmode
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -135,7 +135,7 @@ Description:
a) linux - Boot a Linux image.
b) flash - Boot an image for flash updates.
What: /sys/class/mic/mic(x)/log_buf_addr
What: /sys/class/mic/mic<X>/log_buf_addr
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -149,7 +149,7 @@ Description:
log buffer address to be written can be found in the System.map
file of the card OS.
What: /sys/class/mic/mic(x)/log_buf_len
What: /sys/class/mic/mic<X>/log_buf_len
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
@ -163,7 +163,7 @@ Description:
buffer length address to be written can be found in the
System.map file of the card OS.
What: /sys/class/mic/mic(x)/heartbeat_enable
What: /sys/class/mic/mic<X>/heartbeat_enable
Date: March 2015
KernelVersion: 4.4
Contact: Ashutosh Dixit <ashutosh.dixit@intel.com>

2
Documentation/ABI/testing/sysfs-class-mux
Просмотреть файл

@ -7,7 +7,7 @@ Description:
Framework and provides a sysfs interface for using MUX
controllers.
What: /sys/class/mux/muxchipN/
What: /sys/class/mux/muxchip<N>/
Date: April 2017
KernelVersion: 4.13
Contact: Peter Rosin <peda@axentia.se>

20
Documentation/ABI/testing/sysfs-class-pwm
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@ -7,7 +7,7 @@ Description:
Framework and provides a sysfs interface for using PWM
channels.
What: /sys/class/pwm/pwmchipN/
What: /sys/class/pwm/pwmchip<N>/
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
@ -16,14 +16,14 @@ Description:
probed PWM controller/chip where N is the base of the
PWM chip.
What: /sys/class/pwm/pwmchipN/npwm
What: /sys/class/pwm/pwmchip<N>/npwm
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
The number of PWM channels supported by the PWM chip.
What: /sys/class/pwm/pwmchipN/export
What: /sys/class/pwm/pwmchip<N>/export
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
@ -31,14 +31,14 @@ Description:
Exports a PWM channel from the PWM chip for sysfs control.
Value is between 0 and /sys/class/pwm/pwmchipN/npwm - 1.
What: /sys/class/pwm/pwmchipN/unexport
What: /sys/class/pwm/pwmchip<N>/unexport
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Unexports a PWM channel.
What: /sys/class/pwm/pwmchipN/pwmX
What: /sys/class/pwm/pwmchip<N>/pwmX
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
@ -47,21 +47,21 @@ Description:
each exported PWM channel where X is the exported PWM
channel number.
What: /sys/class/pwm/pwmchipN/pwmX/period
What: /sys/class/pwm/pwmchip<N>/pwmX/period
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Sets the PWM signal period in nanoseconds.
What: /sys/class/pwm/pwmchipN/pwmX/duty_cycle
What: /sys/class/pwm/pwmchip<N>/pwmX/duty_cycle
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Sets the PWM signal duty cycle in nanoseconds.
What: /sys/class/pwm/pwmchipN/pwmX/polarity
What: /sys/class/pwm/pwmchip<N>/pwmX/polarity
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
@ -69,7 +69,7 @@ Description:
Sets the output polarity of the PWM signal to "normal" or
"inversed".
What: /sys/class/pwm/pwmchipN/pwmX/enable
What: /sys/class/pwm/pwmchip<N>/pwmX/enable
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
@ -78,7 +78,7 @@ Description:
0 is disabled
1 is enabled
What: /sys/class/pwm/pwmchipN/pwmX/capture
What: /sys/class/pwm/pwmchip<N>/pwmX/capture
Date: June 2016
KernelVersion: 4.8
Contact: Lee Jones <lee.jones@linaro.org>

4
Documentation/ABI/testing/sysfs-class-rapidio
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@ -10,7 +10,7 @@ Description:
NOTE: An mport ID is not a RapidIO destination ID assigned to a
given local mport device.
What: /sys/class/rapidio_port/rapidioN/sys_size
What: /sys/class/rapidio_port/rapidio<N>/sys_size
Date: Apr, 2014
KernelVersion: v3.15
Contact: Matt Porter <mporter@kernel.crashing.org>,
@ -22,7 +22,7 @@ Description:
1 = large (16-bit destination ID, max. 65536 devices).
What: /sys/class/rapidio_port/rapidioN/port_destid
What: /sys/class/rapidio_port/rapidio<N>/port_destid
Date: Apr, 2014
KernelVersion: v3.15
Contact: Matt Porter <mporter@kernel.crashing.org>,

14
Documentation/ABI/testing/sysfs-class-rc
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@ -7,7 +7,7 @@ Description:
core and provides a sysfs interface for configuring infrared
remote controller receivers.
What: /sys/class/rc/rcN/
What: /sys/class/rc/rc<N>/
Date: Apr 2010
KernelVersion: 2.6.35
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -15,7 +15,7 @@ Description:
A /sys/class/rc/rcN directory is created for each remote
control receiver device where N is the number of the receiver.
What: /sys/class/rc/rcN/protocols
What: /sys/class/rc/rc<N>/protocols
Date: Jun 2010
KernelVersion: 2.6.36
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -40,7 +40,7 @@ Description:
Write fails with EINVAL if an invalid protocol combination or
unknown protocol name is used.
What: /sys/class/rc/rcN/filter
What: /sys/class/rc/rc<N>/filter
Date: Jan 2014
KernelVersion: 3.15
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -55,7 +55,7 @@ Description:
This value may be reset to 0 if the current protocol is altered.
What: /sys/class/rc/rcN/filter_mask
What: /sys/class/rc/rc<N>/filter_mask
Date: Jan 2014
KernelVersion: 3.15
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -72,7 +72,7 @@ Description:
This value may be reset to 0 if the current protocol is altered.
What: /sys/class/rc/rcN/wakeup_protocols
What: /sys/class/rc/rc<N>/wakeup_protocols
Date: Feb 2017
KernelVersion: 4.11
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -98,7 +98,7 @@ Description:
unknown protocol name is used, or if wakeup is not supported by
the hardware.
What: /sys/class/rc/rcN/wakeup_filter
What: /sys/class/rc/rc<N>/wakeup_filter
Date: Jan 2014
KernelVersion: 3.15
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
@ -117,7 +117,7 @@ Description:
This value may be reset to 0 if the wakeup protocol is altered.
What: /sys/class/rc/rcN/wakeup_filter_mask
What: /sys/class/rc/rc<N>/wakeup_filter_mask
Date: Jan 2014
KernelVersion: 3.15
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

2
Documentation/ABI/testing/sysfs-class-rc-nuvoton
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@ -1,4 +1,4 @@
What: /sys/class/rc/rcN/wakeup_data
What: /sys/class/rc/rc<N>/wakeup_data
Date: Mar 2016
KernelVersion: 4.6
Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

2
Documentation/ABI/testing/sysfs-class-typec
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@ -200,7 +200,7 @@ Description: USB Power Delivery Specification defines a set of product types
amc Alternate Mode Controller
====================== ==========================
What: /sys/class/typec/<port>-partner>/identity/
What: /sys/class/typec/<port>-partner/identity/
Date: April 2017
Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Description:

26
Documentation/ABI/testing/sysfs-class-uwb_rc
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@ -18,14 +18,14 @@ Description:
and it will be removed. The default is 3 superframes
(~197 ms) as required by the specification.
What: /sys/class/uwb_rc/uwbN/
What: /sys/class/uwb_rc/uwb<N>/
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
An individual UWB radio controller.
What: /sys/class/uwb_rc/uwbN/beacon
What: /sys/class/uwb_rc/uwb<N>/beacon
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -43,7 +43,7 @@ Description:
Reading returns the currently active channel, or -1 if
the radio controller is not beaconing.
What: /sys/class/uwb_rc/uwbN/ASIE
What: /sys/class/uwb_rc/uwb<N>/ASIE
Date: August 2014
KernelVersion: 3.18
Contact: linux-usb@vger.kernel.org
@ -56,7 +56,7 @@ Description:
Reading returns the current ASIE. Writing replaces
the current ASIE with the one written.
What: /sys/class/uwb_rc/uwbN/scan
What: /sys/class/uwb_rc/uwb<N>/scan
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -75,7 +75,7 @@ Description:
4 scan (with start time of <bpst offset>)
== =======================================
What: /sys/class/uwb_rc/uwbN/mac_address
What: /sys/class/uwb_rc/uwb<N>/mac_address
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -85,7 +85,7 @@ Description:
controller's EUI-48 but only do so while the device is
not beaconing or scanning.
What: /sys/class/uwb_rc/uwbN/wusbhc
What: /sys/class/uwb_rc/uwb<N>/wusbhc
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -93,7 +93,7 @@ Description:
A symlink to the device (if any) of the WUSB Host
Controller PAL using this radio controller.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -102,7 +102,7 @@ Description:
as part of a scan or is a member of the radio
controllers beacon group.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/BPST
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/BPST
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -111,7 +111,7 @@ Description:
interval superframe timer) of the last beacon from
this device was received.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/DevAddr
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/DevAddr
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -119,7 +119,7 @@ Description:
The current DevAddr of this device in colon separated
hex octets.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/EUI_48
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/EUI_48
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -128,7 +128,7 @@ Description:
The EUI-48 of this device in colon separated hex
octets.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/IEs
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/IEs
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -136,7 +136,7 @@ Description:
The latest IEs included in this device's beacon, in
space separated hex octets with one IE per line.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/LQE
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/LQE
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
@ -146,7 +146,7 @@ Description:
This gives an estimate on a suitable PHY rate. Refer
to [ECMA-368] section 13.3 for more details.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/RSSI
What: /sys/class/uwb_rc/uwb<N>/<EUI-48>/RSSI
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org

10
Documentation/ABI/testing/sysfs-class-uwb_rc-wusbhc
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@ -1,4 +1,4 @@
What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_chid
What: /sys/class/uwb_rc/uwb<N>/wusbhc/wusb_chid
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
@ -9,7 +9,7 @@ Description:
Set an all zero CHID to stop the host controller.
What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_trust_timeout
What: /sys/class/uwb_rc/uwb<N>/wusbhc/wusb_trust_timeout
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
@ -24,7 +24,7 @@ Description:
lifetime of PTKs and GTKs) it should not be changed
from the default.
What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_phy_rate
What: /sys/class/uwb_rc/uwb<N>/wusbhc/wusb_phy_rate
Date: August 2009
KernelVersion: 2.6.32
Contact: David Vrabel <david.vrabel@csr.com>
@ -37,7 +37,7 @@ Description:
Refer to [ECMA-368] section 10.3.1.1 for the value to
use.
What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_dnts
What: /sys/class/uwb_rc/uwb<N>/wusbhc/wusb_dnts
Date: June 2013
KernelVersion: 3.11
Contact: Thomas Pugliese <thomas.pugliese@gmail.com>
@ -47,7 +47,7 @@ Description:
often the devices will have the opportunity to send
notifications to the host.
What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_retry_count
What: /sys/class/uwb_rc/uwb<N>/wusbhc/wusb_retry_count
Date: June 2013
KernelVersion: 3.11
Contact: Thomas Pugliese <thomas.pugliese@gmail.com>

10
Documentation/ABI/testing/sysfs-devices-platform-dock
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@ -1,4 +1,4 @@
What: /sys/devices/platform/dock.N/docked
What: /sys/devices/platform/dock.<N>/docked
Date: Dec, 2006
KernelVersion: 2.6.19
Contact: linux-acpi@vger.kernel.org
@ -6,7 +6,7 @@ Description:
(RO) Value 1 or 0 indicates whether the software believes the
laptop is docked in a docking station.
What: /sys/devices/platform/dock.N/undock
What: /sys/devices/platform/dock.<N>/undock
Date: Dec, 2006
KernelVersion: 2.6.19
Contact: linux-acpi@vger.kernel.org
@ -14,14 +14,14 @@ Description:
(WO) Writing to this file causes the software to initiate an
undock request to the firmware.
What: /sys/devices/platform/dock.N/uid
What: /sys/devices/platform/dock.<N>/uid
Date: Feb, 2007
KernelVersion: v2.6.21
Contact: linux-acpi@vger.kernel.org
Description:
(RO) Displays the docking station the laptop is docked to.
What: /sys/devices/platform/dock.N/flags
What: /sys/devices/platform/dock.<N>/flags
Date: May, 2007
KernelVersion: v2.6.21
Contact: linux-acpi@vger.kernel.org
@ -30,7 +30,7 @@ Description:
request has been made by the user (from the immediate_undock
option).
What: /sys/devices/platform/dock.N/type
What: /sys/devices/platform/dock.<N>/type
Date: Aug, 2008
KernelVersion: v2.6.27
Contact: linux-acpi@vger.kernel.org

36
Documentation/ABI/testing/sysfs-devices-power
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@ -269,3 +269,39 @@ Description:
the current runtime PM status of the device, which may be
"suspended", "suspending", "resuming", "active", "error" (fatal
error), or "unsupported" (runtime PM is disabled).
What: /sys/devices/.../power/runtime_active_time
Date: Jul 2010
Contact: Arjan van de Ven <arjan@linux.intel.com>
Description:
Reports the total time that the device has been active.
Used for runtime PM statistics.
What: /sys/devices/.../power/runtime_suspended_time
Date: Jul 2010
Contact: Arjan van de Ven <arjan@linux.intel.com>
Description:
Reports total time that the device has been suspended.
Used for runtime PM statistics.
What: /sys/devices/.../power/runtime_usage
Date: Apr 2010
Contact: Dominik Brodowski <linux@dominikbrodowski.net>
Description:
Reports the runtime PM usage count of a device.
What: /sys/devices/.../power/runtime_enabled
Date: Apr 2010
Contact: Dominik Brodowski <linux@dominikbrodowski.net>
Description:
Is runtime PM enabled for this device?
States are "enabled", "disabled", "forbidden" or a
combination of the latter two.
What: /sys/devices/.../power/runtime_active_kids
Date: Apr 2010
Contact: Dominik Brodowski <linux@dominikbrodowski.net>
Description:
Reports the runtime PM children usage count of a device, or
0 if the the children will be ignored.

8
Documentation/ABI/testing/sysfs-devices-removable
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@ -7,10 +7,12 @@ Description:
bus / platform-specific way. This attribute is only present for
devices that can support determining such information:
"removable": device can be removed from the platform by the user
"fixed": device is fixed to the platform / cannot be removed
=========== ===================================================
"removable" device can be removed from the platform by the user
"fixed" device is fixed to the platform / cannot be removed
by the user.
"unknown": The information is unavailable / cannot be deduced.
"unknown" The information is unavailable / cannot be deduced.
=========== ===================================================
Currently this is only supported by USB (which infers the
information from a combination of hub descriptor bits and

68
Documentation/ABI/testing/sysfs-devices-system-cpu
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@ -7,7 +7,7 @@ Description:
Individual CPU attributes are contained in subdirectories
named by the kernel's logical CPU number, e.g.:
/sys/devices/system/cpu/cpu#/
/sys/devices/system/cpu/cpuX/
What: /sys/devices/system/cpu/kernel_max
/sys/devices/system/cpu/offline
@ -53,7 +53,7 @@ Description: Dynamic addition and removal of CPU's. This is not hotplug
the system. Information written to the file to remove CPU's
is architecture specific.
What: /sys/devices/system/cpu/cpu#/node
What: /sys/devices/system/cpu/cpuX/node
Date: October 2009
Contact: Linux memory management mailing list <linux-mm@kvack.org>
Description: Discover NUMA node a CPU belongs to
@ -67,41 +67,41 @@ Description: Discover NUMA node a CPU belongs to
/sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
What: /sys/devices/system/cpu/cpu#/topology/core_id
/sys/devices/system/cpu/cpu#/topology/core_siblings
/sys/devices/system/cpu/cpu#/topology/core_siblings_list
/sys/devices/system/cpu/cpu#/topology/physical_package_id
/sys/devices/system/cpu/cpu#/topology/thread_siblings
/sys/devices/system/cpu/cpu#/topology/thread_siblings_list
What: /sys/devices/system/cpu/cpuX/topology/core_id
/sys/devices/system/cpu/cpuX/topology/core_siblings
/sys/devices/system/cpu/cpuX/topology/core_siblings_list
/sys/devices/system/cpu/cpuX/topology/physical_package_id
/sys/devices/system/cpu/cpuX/topology/thread_siblings
/sys/devices/system/cpu/cpuX/topology/thread_siblings_list
Date: December 2008
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description: CPU topology files that describe a logical CPU's relationship
to other cores and threads in the same physical package.
One cpu# directory is created per logical CPU in the system,
One cpuX directory is created per logical CPU in the system,
e.g. /sys/devices/system/cpu/cpu42/.
Briefly, the files above are:
core_id: the CPU core ID of cpu#. Typically it is the
core_id: the CPU core ID of cpuX. Typically it is the
hardware platform's identifier (rather than the kernel's).
The actual value is architecture and platform dependent.
core_siblings: internal kernel map of cpu#'s hardware threads
core_siblings: internal kernel map of cpuX's hardware threads
within the same physical_package_id.
core_siblings_list: human-readable list of the logical CPU
numbers within the same physical_package_id as cpu#.
numbers within the same physical_package_id as cpuX.
physical_package_id: physical package id of cpu#. Typically
physical_package_id: physical package id of cpuX. Typically
corresponds to a physical socket number, but the actual value
is architecture and platform dependent.
thread_siblings: internal kernel map of cpu#'s hardware
threads within the same core as cpu#
thread_siblings: internal kernel map of cpuX's hardware
threads within the same core as cpuX
thread_siblings_list: human-readable list of cpu#'s hardware
threads within the same core as cpu#
thread_siblings_list: human-readable list of cpuX's hardware
threads within the same core as cpuX
See Documentation/admin-guide/cputopology.rst for more information.
@ -135,7 +135,7 @@ Description: Discover cpuidle policy and mechanism
Documentation/driver-api/pm/cpuidle.rst for more information.
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/name
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/name
/sys/devices/system/cpu/cpuX/cpuidle/stateN/latency
/sys/devices/system/cpu/cpuX/cpuidle/stateN/power
/sys/devices/system/cpu/cpuX/cpuidle/stateN/time
@ -174,7 +174,7 @@ Description:
(a count).
======== ==== =================================================
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/desc
Date: February 2008
KernelVersion: v2.6.25
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -182,7 +182,7 @@ Description:
(RO) A small description about the idle state (string).
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/disable
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/disable
Date: March 2012
KernelVersion: v3.10
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -195,14 +195,14 @@ Description:
does not reflect it. Likewise, if one enables a deep state but a
lighter state still is disabled, then this has no effect.
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/default_status
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/default_status
Date: December 2019
KernelVersion: v5.6
Contact: Linux power management list <linux-pm@vger.kernel.org>
Description:
(RO) The default status of this state, "enabled" or "disabled".
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/residency
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/residency
Date: March 2014
KernelVersion: v3.15
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -211,7 +211,7 @@ Description:
time (in microseconds) this cpu should spend in this idle state
to make the transition worth the effort.
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/s2idle/
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/s2idle/
Date: March 2018
KernelVersion: v4.17
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -221,7 +221,7 @@ Description:
This attribute group is only present for states that can be
used in suspend-to-idle with suspended timekeeping.
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/s2idle/time
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/s2idle/time
Date: March 2018
KernelVersion: v4.17
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -229,7 +229,7 @@ Description:
Total time spent by the CPU in suspend-to-idle (with scheduler
tick suspended) after requesting this state.
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/s2idle/usage
What: /sys/devices/system/cpu/cpuX/cpuidle/state<N>/s2idle/usage
Date: March 2018
KernelVersion: v4.17
Contact: Linux power management list <linux-pm@vger.kernel.org>
@ -237,7 +237,7 @@ Description:
Total number of times this state has been requested by the CPU
while entering suspend-to-idle.
What: /sys/devices/system/cpu/cpu#/cpufreq/*
What: /sys/devices/system/cpu/cpuX/cpufreq/*
Date: pre-git history
Contact: linux-pm@vger.kernel.org
Description: Discover and change clock speed of CPUs
@ -252,7 +252,7 @@ Description: Discover and change clock speed of CPUs
See files in Documentation/cpu-freq/ for more information.
What: /sys/devices/system/cpu/cpu#/cpufreq/freqdomain_cpus
What: /sys/devices/system/cpu/cpuX/cpufreq/freqdomain_cpus
Date: June 2013
Contact: linux-pm@vger.kernel.org
Description: Discover CPUs in the same CPU frequency coordination domain
@ -301,16 +301,16 @@ Description: Processor frequency boosting control
Documentation/admin-guide/pm/cpufreq.rst
What: /sys/devices/system/cpu/cpu#/crash_notes
/sys/devices/system/cpu/cpu#/crash_notes_size
What: /sys/devices/system/cpu/cpuX/crash_notes
/sys/devices/system/cpu/cpuX/crash_notes_size
Date: April 2013
Contact: kexec@lists.infradead.org
Description: address and size of the percpu note.
crash_notes: the physical address of the memory that holds the
note of cpu#.
note of cpuX.
crash_notes_size: size of the note of cpu#.
crash_notes_size: size of the note of cpuX.
What: /sys/devices/system/cpu/intel_pstate/max_perf_pct
@ -503,12 +503,12 @@ Description: Identifies the subset of CPUs in the system that can execute
If absent, then all or none of the CPUs can execute AArch32
applications and execve() will behave accordingly.
What: /sys/devices/system/cpu/cpu#/cpu_capacity
What: /sys/devices/system/cpu/cpuX/cpu_capacity
Date: December 2016
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description: information about CPUs heterogeneity.
cpu_capacity: capacity of cpu#.
cpu_capacity: capacity of cpuX.
What: /sys/devices/system/cpu/vulnerabilities
/sys/devices/system/cpu/vulnerabilities/meltdown
@ -560,7 +560,7 @@ Description: Control Symmetric Multi Threading (SMT)
If control status is "forceoff" or "notsupported" writes
are rejected.
What: /sys/devices/system/cpu/cpu#/power/energy_perf_bias
What: /sys/devices/system/cpu/cpuX/power/energy_perf_bias
Date: March 2019
Contact: linux-pm@vger.kernel.org
Description: Intel Energy and Performance Bias Hint (EPB)

126
Documentation/ABI/testing/sysfs-driver-ufs
Просмотреть файл

@ -13,6 +13,7 @@ Description:
Interface specification for more details.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
What: /sys/bus/platform/devices/*.ufs/device_descriptor/device_type
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device type. This is one of the UFS
@ -22,6 +23,7 @@ Description: This file shows the device type. This is one of the UFS
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_class
What: /sys/bus/platform/devices/*.ufs/device_descriptor/device_class
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device class. This is one of the UFS
@ -31,6 +33,7 @@ Description: This file shows the device class. This is one of the UFS
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_sub_class
What: /sys/bus/platform/devices/*.ufs/device_descriptor/device_sub_class
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the UFS storage subclass. This is one of
@ -40,6 +43,7 @@ Description: This file shows the UFS storage subclass. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/protocol
What: /sys/bus/platform/devices/*.ufs/device_descriptor/protocol
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the protocol supported by an UFS device.
@ -50,6 +54,7 @@ Description: This file shows the protocol supported by an UFS device.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_luns
What: /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_luns
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows number of logical units. This is one of
@ -59,6 +64,7 @@ Description: This file shows number of logical units. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_wluns
What: /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_wluns
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows number of well known logical units.
@ -69,6 +75,7 @@ Description: This file shows number of well known logical units.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/boot_enable
What: /sys/bus/platform/devices/*.ufs/device_descriptor/boot_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows value that indicates whether the device is
@ -79,6 +86,7 @@ Description: This file shows value that indicates whether the device is
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/descriptor_access_enable
What: /sys/bus/platform/devices/*.ufs/device_descriptor/descriptor_access_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows value that indicates whether the device
@ -90,6 +98,7 @@ Description: This file shows value that indicates whether the device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_power_mode
What: /sys/bus/platform/devices/*.ufs/device_descriptor/initial_power_mode
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows value that defines the power mode after
@ -100,6 +109,7 @@ Description: This file shows value that defines the power mode after
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/high_priority_lun
What: /sys/bus/platform/devices/*.ufs/device_descriptor/high_priority_lun
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the high priority lun. This is one of
@ -109,6 +119,7 @@ Description: This file shows the high priority lun. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/secure_removal_type
What: /sys/bus/platform/devices/*.ufs/device_descriptor/secure_removal_type
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the secure removal type. This is one of
@ -118,6 +129,7 @@ Description: This file shows the secure removal type. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/support_security_lun
What: /sys/bus/platform/devices/*.ufs/device_descriptor/support_security_lun
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the security lun is supported.
@ -128,6 +140,7 @@ Description: This file shows whether the security lun is supported.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/bkops_termination_latency
What: /sys/bus/platform/devices/*.ufs/device_descriptor/bkops_termination_latency
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the background operations termination
@ -138,6 +151,7 @@ Description: This file shows the background operations termination
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_active_icc_level
What: /sys/bus/platform/devices/*.ufs/device_descriptor/initial_active_icc_level
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the initial active ICC level. This is one
@ -147,6 +161,7 @@ Description: This file shows the initial active ICC level. This is one
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/specification_version
What: /sys/bus/platform/devices/*.ufs/device_descriptor/specification_version
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the specification version. This is one
@ -156,6 +171,7 @@ Description: This file shows the specification version. This is one
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturing_date
What: /sys/bus/platform/devices/*.ufs/device_descriptor/manufacturing_date
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the manufacturing date in BCD format.
@ -166,6 +182,7 @@ Description: This file shows the manufacturing date in BCD format.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturer_id
What: /sys/bus/platform/devices/*.ufs/device_descriptor/manufacturer_id
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the manufacturer ID. This is one of the
@ -175,6 +192,7 @@ Description: This file shows the manufacturer ID. This is one of the
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtt_capability
What: /sys/bus/platform/devices/*.ufs/device_descriptor/rtt_capability
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum number of outstanding RTTs
@ -185,6 +203,7 @@ Description: This file shows the maximum number of outstanding RTTs
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtc_update
What: /sys/bus/platform/devices/*.ufs/device_descriptor/rtc_update
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the frequency and method of the realtime
@ -195,6 +214,7 @@ Description: This file shows the frequency and method of the realtime
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ufs_features
What: /sys/bus/platform/devices/*.ufs/device_descriptor/ufs_features
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows which features are supported by the device.
@ -205,6 +225,7 @@ Description: This file shows which features are supported by the device.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ffu_timeout
What: /sys/bus/platform/devices/*.ufs/device_descriptor/ffu_timeout
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the FFU timeout. This is one of the
@ -214,6 +235,7 @@ Description: This file shows the FFU timeout. This is one of the
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/queue_depth
What: /sys/bus/platform/devices/*.ufs/device_descriptor/queue_depth
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device queue depth. This is one of the
@ -223,6 +245,7 @@ Description: This file shows the device queue depth. This is one of the
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_version
What: /sys/bus/platform/devices/*.ufs/device_descriptor/device_version
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device version. This is one of the
@ -232,6 +255,7 @@ Description: This file shows the device version. This is one of the
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_secure_wpa
What: /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_secure_wpa
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows number of secure write protect areas
@ -242,6 +266,7 @@ Description: This file shows number of secure write protect areas
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_max_data_size
What: /sys/bus/platform/devices/*.ufs/device_descriptor/psa_max_data_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum amount of data that may be
@ -253,6 +278,7 @@ Description: This file shows the maximum amount of data that may be
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_state_timeout
What: /sys/bus/platform/devices/*.ufs/device_descriptor/psa_state_timeout
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the command maximum timeout for a change
@ -264,6 +290,7 @@ Description: This file shows the command maximum timeout for a change
What: /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/unipro_version
What: /sys/bus/platform/devices/*.ufs/interconnect_descriptor/unipro_version
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the MIPI UniPro version number in BCD format.
@ -274,6 +301,7 @@ Description: This file shows the MIPI UniPro version number in BCD format.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/mphy_version
What: /sys/bus/platform/devices/*.ufs/interconnect_descriptor/mphy_version
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the MIPI M-PHY version number in BCD format.
@ -285,6 +313,7 @@ Description: This file shows the MIPI M-PHY version number in BCD format.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/raw_device_capacity
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/raw_device_capacity
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the total memory quantity available to
@ -296,6 +325,7 @@ Description: This file shows the total memory quantity available to
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_luns
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_luns
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum number of logical units
@ -306,6 +336,7 @@ Description: This file shows the maximum number of logical units
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/segment_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/segment_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the segment size. This is one of the UFS
@ -315,6 +346,7 @@ Description: This file shows the segment size. This is one of the UFS
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/allocation_unit_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/allocation_unit_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the allocation unit size. This is one of
@ -324,6 +356,7 @@ Description: This file shows the allocation unit size. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/min_addressable_block_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/min_addressable_block_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the minimum addressable block size. This
@ -334,6 +367,7 @@ Description: This file shows the minimum addressable block size. This
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_read_block_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_read_block_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the optimal read block size. This is one
@ -344,6 +378,7 @@ Description: This file shows the optimal read block size. This is one
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_write_block_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_write_block_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the optimal write block size. This is one
@ -354,6 +389,7 @@ Description: This file shows the optimal write block size. This is one
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_in_buffer_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_in_buffer_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum data-in buffer size. This
@ -364,6 +400,7 @@ Description: This file shows the maximum data-in buffer size. This
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_out_buffer_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_out_buffer_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum data-out buffer size. This
@ -374,6 +411,7 @@ Description: This file shows the maximum data-out buffer size. This
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/rpmb_rw_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/rpmb_rw_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum number of RPMB frames allowed
@ -384,6 +422,7 @@ Description: This file shows the maximum number of RPMB frames allowed
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/dyn_capacity_resource_policy
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/dyn_capacity_resource_policy
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the dynamic capacity resource policy. This
@ -394,6 +433,7 @@ Description: This file shows the dynamic capacity resource policy. This
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/data_ordering
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/data_ordering
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows support for out-of-order data transfer.
@ -404,6 +444,7 @@ Description: This file shows support for out-of-order data transfer.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_contexts
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_contexts
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows maximum available number of contexts which
@ -414,6 +455,7 @@ Description: This file shows maximum available number of contexts which
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_unit_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_unit_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows system data tag unit size. This is one of
@ -423,6 +465,7 @@ Description: This file shows system data tag unit size. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_resource_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_resource_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows maximum storage area size allocated by
@ -434,6 +477,7 @@ Description: This file shows maximum storage area size allocated by
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/secure_removal_types
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/secure_removal_types
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows supported secure removal types. This is
@ -444,6 +488,7 @@ Description: This file shows supported secure removal types. This is
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/memory_types
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/memory_types
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows supported memory types. This is one of
@ -454,6 +499,7 @@ Description: This file shows supported memory types. This is one of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_max_alloc_units
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_max_alloc_units
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum number of allocation units for
@ -465,6 +511,7 @@ Description: This file shows the maximum number of allocation units for
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_capacity_adjustment_factor
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_capacity_adjustment_factor
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the memory capacity adjustment factor for
@ -477,6 +524,7 @@ Description: This file shows the memory capacity adjustment factor for
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/eol_info
What: /sys/bus/platform/devices/*.ufs/health_descriptor/eol_info
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows preend of life information. This is one
@ -487,6 +535,7 @@ Description: This file shows preend of life information. This is one
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_a
What: /sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_a
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows indication of the device life time
@ -497,6 +546,7 @@ Description: This file shows indication of the device life time
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_b
What: /sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_b
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows indication of the device life time
@ -508,6 +558,7 @@ Description: This file shows indication of the device life time
What: /sys/bus/platform/drivers/ufshcd/*/power_descriptor/active_icc_levels_vcc*
What: /sys/bus/platform/devices/*.ufs/power_descriptor/active_icc_levels_vcc*
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows maximum VCC, VCCQ and VCCQ2 value for
@ -519,6 +570,7 @@ Description: This file shows maximum VCC, VCCQ and VCCQ2 value for
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/manufacturer_name
What: /sys/bus/platform/devices/*.ufs/string_descriptors/manufacturer_name
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a device manufacturer name string.
@ -528,6 +580,7 @@ Description: This file contains a device manufacturer name string.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
What: /sys/bus/platform/devices/*.ufs/string_descriptors/product_name
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a product name string. The full information
@ -536,6 +589,7 @@ Description: This file contains a product name string. The full information
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
What: /sys/bus/platform/devices/*.ufs/string_descriptors/oem_id
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a OEM ID string. The full information
@ -544,6 +598,7 @@ Description: This file contains a OEM ID string. The full information
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
What: /sys/bus/platform/devices/*.ufs/string_descriptors/serial_number
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a device serial number string. The full
@ -553,6 +608,7 @@ Description: This file contains a device serial number string. The full
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
What: /sys/bus/platform/devices/*.ufs/string_descriptors/product_revision
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file contains a product revision string. The full
@ -684,6 +740,7 @@ Description: This file shows the granularity of the LUN. This is one of
What: /sys/bus/platform/drivers/ufshcd/*/flags/device_init
What: /sys/bus/platform/devices/*.ufs/flags/device_init
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device init status. The full information
@ -692,6 +749,7 @@ Description: This file shows the device init status. The full information
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
What: /sys/bus/platform/devices/*.ufs/flags/permanent_wpe
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether permanent write protection is enabled.
@ -701,6 +759,7 @@ Description: This file shows whether permanent write protection is enabled.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
What: /sys/bus/platform/devices/*.ufs/flags/power_on_wpe
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether write protection is enabled on all
@ -711,6 +770,7 @@ Description: This file shows whether write protection is enabled on all
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
What: /sys/bus/platform/devices/*.ufs/flags/bkops_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device background operations are
@ -720,6 +780,7 @@ Description: This file shows whether the device background operations are
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
What: /sys/bus/platform/devices/*.ufs/flags/life_span_mode_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device life span mode is enabled.
@ -729,6 +790,7 @@ Description: This file shows whether the device life span mode is enabled.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
What: /sys/bus/platform/devices/*.ufs/flags/phy_resource_removal
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether physical resource removal is enable.
@ -738,6 +800,7 @@ Description: This file shows whether physical resource removal is enable.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
What: /sys/bus/platform/devices/*.ufs/flags/busy_rtc
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device is executing internal
@ -747,6 +810,7 @@ Description: This file shows whether the device is executing internal
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
What: /sys/bus/platform/devices/*.ufs/flags/disable_fw_update
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device FW update is permanently
@ -757,6 +821,7 @@ Description: This file shows whether the device FW update is permanently
What: /sys/bus/platform/drivers/ufshcd/*/attributes/boot_lun_enabled
What: /sys/bus/platform/devices/*.ufs/attributes/boot_lun_enabled
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the boot lun enabled UFS device attribute.
@ -766,6 +831,7 @@ Description: This file provides the boot lun enabled UFS device attribute.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/current_power_mode
What: /sys/bus/platform/devices/*.ufs/attributes/current_power_mode
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the current power mode UFS device attribute.
@ -775,6 +841,7 @@ Description: This file provides the current power mode UFS device attribute.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/active_icc_level
What: /sys/bus/platform/devices/*.ufs/attributes/active_icc_level
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the active icc level UFS device attribute.
@ -784,6 +851,7 @@ Description: This file provides the active icc level UFS device attribute.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/ooo_data_enabled
What: /sys/bus/platform/devices/*.ufs/attributes/ooo_data_enabled
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the out of order data transfer enabled UFS
@ -793,6 +861,7 @@ Description: This file provides the out of order data transfer enabled UFS
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/bkops_status
What: /sys/bus/platform/devices/*.ufs/attributes/bkops_status
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the background operations status UFS device
@ -802,6 +871,7 @@ Description: This file provides the background operations status UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/purge_status
What: /sys/bus/platform/devices/*.ufs/attributes/purge_status
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the purge operation status UFS device
@ -811,6 +881,7 @@ Description: This file provides the purge operation status UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_in_size
What: /sys/bus/platform/devices/*.ufs/attributes/max_data_in_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum data size in a DATA IN
@ -820,6 +891,7 @@ Description: This file shows the maximum data size in a DATA IN
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_out_size
What: /sys/bus/platform/devices/*.ufs/attributes/max_data_out_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the maximum number of bytes that can be
@ -829,6 +901,7 @@ Description: This file shows the maximum number of bytes that can be
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/reference_clock_frequency
What: /sys/bus/platform/devices/*.ufs/attributes/reference_clock_frequency
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the reference clock frequency UFS device
@ -838,6 +911,7 @@ Description: This file provides the reference clock frequency UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/configuration_descriptor_lock
What: /sys/bus/platform/devices/*.ufs/attributes/configuration_descriptor_lock
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the configuration descriptor is locked.
@ -845,6 +919,7 @@ Description: This file shows whether the configuration descriptor is locked.
UFS specifications 2.1. The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_number_of_rtt
What: /sys/bus/platform/devices/*.ufs/attributes/max_number_of_rtt
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the maximum current number of
@ -855,6 +930,7 @@ Description: This file provides the maximum current number of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_control
What: /sys/bus/platform/devices/*.ufs/attributes/exception_event_control
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the exception event control UFS device
@ -864,6 +940,7 @@ Description: This file provides the exception event control UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_status
What: /sys/bus/platform/devices/*.ufs/attributes/exception_event_status
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the exception event status UFS device
@ -873,6 +950,7 @@ Description: This file provides the exception event status UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/ffu_status
What: /sys/bus/platform/devices/*.ufs/attributes/ffu_status
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file provides the ffu status UFS device attribute.
@ -882,6 +960,7 @@ Description: This file provides the ffu status UFS device attribute.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_state
What: /sys/bus/platform/devices/*.ufs/attributes/psa_state
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file show the PSA feature status. The full information
@ -890,6 +969,7 @@ Description: This file show the PSA feature status. The full information
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_data_size
What: /sys/bus/platform/devices/*.ufs/attributes/psa_data_size
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the amount of data that the host plans to
@ -912,6 +992,7 @@ Description: This file shows the The amount of physical memory needed
What: /sys/bus/platform/drivers/ufshcd/*/rpm_lvl
What: /sys/bus/platform/devices/*.ufs/rpm_lvl
Date: September 2014
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry could be used to set or show the UFS device
@ -938,6 +1019,7 @@ Description: This entry could be used to set or show the UFS device
== ====================================================
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_dev_state
What: /sys/bus/platform/devices/*.ufs/rpm_target_dev_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target power mode of an UFS device
@ -946,6 +1028,7 @@ Description: This entry shows the target power mode of an UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_link_state
What: /sys/bus/platform/devices/*.ufs/rpm_target_link_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target state of an UFS UIC link
@ -954,6 +1037,7 @@ Description: This entry shows the target state of an UFS UIC link
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/spm_lvl
What: /sys/bus/platform/devices/*.ufs/spm_lvl
Date: September 2014
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry could be used to set or show the UFS device
@ -980,6 +1064,7 @@ Description: This entry could be used to set or show the UFS device
== ====================================================
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_dev_state
What: /sys/bus/platform/devices/*.ufs/spm_target_dev_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target power mode of an UFS device
@ -988,6 +1073,7 @@ Description: This entry shows the target power mode of an UFS device
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_link_state
What: /sys/bus/platform/devices/*.ufs/spm_target_link_state
Date: February 2018
Contact: Subhash Jadavani <subhashj@codeaurora.org>
Description: This entry shows the target state of an UFS UIC link
@ -996,6 +1082,7 @@ Description: This entry shows the target state of an UFS UIC link
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
What: /sys/bus/platform/devices/*.ufs/monitor/monitor_enable
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the status of performance monitor enablement
@ -1003,6 +1090,7 @@ Description: This file shows the status of performance monitor enablement
is stopped, the performance data collected is also cleared.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
What: /sys/bus/platform/devices/*.ufs/monitor/monitor_chunk_size
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file tells the monitor to focus on requests transferring
@ -1010,6 +1098,7 @@ Description: This file tells the monitor to focus on requests transferring
It can only be changed when monitor is disabled.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
What: /sys/bus/platform/devices/*.ufs/monitor/read_total_sectors
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how many sectors (in 512 Bytes) have been
@ -1018,6 +1107,7 @@ Description: This file shows how many sectors (in 512 Bytes) have been
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
What: /sys/bus/platform/devices/*.ufs/monitor/read_total_busy
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how long (in micro seconds) has been spent
@ -1026,6 +1116,7 @@ Description: This file shows how long (in micro seconds) has been spent
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
What: /sys/bus/platform/devices/*.ufs/monitor/read_nr_requests
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how many read requests have been sent after
@ -1034,6 +1125,7 @@ Description: This file shows how many read requests have been sent after
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
What: /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_max
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the maximum latency (in micro seconds) of
@ -1042,6 +1134,7 @@ Description: This file shows the maximum latency (in micro seconds) of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
What: /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_min
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the minimum latency (in micro seconds) of
@ -1050,6 +1143,7 @@ Description: This file shows the minimum latency (in micro seconds) of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
What: /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_avg
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the average latency (in micro seconds) of
@ -1058,6 +1152,7 @@ Description: This file shows the average latency (in micro seconds) of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
What: /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_sum
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the total latency (in micro seconds) of
@ -1066,6 +1161,7 @@ Description: This file shows the total latency (in micro seconds) of
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
What: /sys/bus/platform/devices/*.ufs/monitor/write_total_sectors
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how many sectors (in 512 Bytes) have been sent
@ -1074,6 +1170,7 @@ Description: This file shows how many sectors (in 512 Bytes) have been sent
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
What: /sys/bus/platform/devices/*.ufs/monitor/write_total_busy
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how long (in micro seconds) has been spent
@ -1082,6 +1179,7 @@ Description: This file shows how long (in micro seconds) has been spent
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
What: /sys/bus/platform/devices/*.ufs/monitor/write_nr_requests
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows how many write requests have been sent after
@ -1090,6 +1188,7 @@ Description: This file shows how many write requests have been sent after
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_max
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the maximum latency (in micro seconds) of write
@ -1098,6 +1197,7 @@ Description: This file shows the maximum latency (in micro seconds) of write
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_min
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the minimum latency (in micro seconds) of write
@ -1106,6 +1206,7 @@ Description: This file shows the minimum latency (in micro seconds) of write
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_avg
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the average latency (in micro seconds) of write
@ -1114,6 +1215,7 @@ Description: This file shows the average latency (in micro seconds) of write
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_sum
Date: January 2021
Contact: Can Guo <cang@codeaurora.org>
Description: This file shows the total latency (in micro seconds) of write
@ -1122,6 +1224,7 @@ Description: This file shows the total latency (in micro seconds) of write
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
What: /sys/bus/platform/devices/*.ufs/device_descriptor/wb_presv_us_en
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows if preserve user-space was configured
@ -1129,6 +1232,7 @@ Description: This entry shows if preserve user-space was configured
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_shared_alloc_units
What: /sys/bus/platform/devices/*.ufs/device_descriptor/wb_shared_alloc_units
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the shared allocated units of WB buffer
@ -1136,6 +1240,7 @@ Description: This entry shows the shared allocated units of WB buffer
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_type
What: /sys/bus/platform/devices/*.ufs/device_descriptor/wb_type
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the configured WB type.
@ -1144,6 +1249,7 @@ Description: This entry shows the configured WB type.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_buff_cap_adj
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_buff_cap_adj
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the total user-space decrease in shared
@ -1154,6 +1260,7 @@ Description: This entry shows the total user-space decrease in shared
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_alloc_units
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_alloc_units
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the Maximum total WriteBooster Buffer size
@ -1162,6 +1269,7 @@ Description: This entry shows the Maximum total WriteBooster Buffer size
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_wb_luns
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_wb_luns
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the maximum number of luns that can support
@ -1170,6 +1278,7 @@ Description: This entry shows the maximum number of luns that can support
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_red_type
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_red_type
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: The supportability of user space reduction mode
@ -1184,6 +1293,7 @@ Description: The supportability of user space reduction mode
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_wb_type
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_wb_type
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: The supportability of WriteBooster Buffer type.
@ -1198,6 +1308,7 @@ Description: The supportability of WriteBooster Buffer type.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_enable
What: /sys/bus/platform/devices/*.ufs/flags/wb_enable
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the status of WriteBooster.
@ -1210,6 +1321,7 @@ Description: This entry shows the status of WriteBooster.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_en
What: /sys/bus/platform/devices/*.ufs/flags/wb_flush_en
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows if flush is enabled.
@ -1222,6 +1334,7 @@ Description: This entry shows if flush is enabled.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_during_h8
What: /sys/bus/platform/devices/*.ufs/flags/wb_flush_during_h8
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: Flush WriteBooster Buffer during hibernate state.
@ -1236,6 +1349,7 @@ Description: Flush WriteBooster Buffer during hibernate state.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_avail_buf
What: /sys/bus/platform/devices/*.ufs/attributes/wb_avail_buf
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the amount of unused WriteBooster buffer
@ -1244,6 +1358,7 @@ Description: This entry shows the amount of unused WriteBooster buffer
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_cur_buf
What: /sys/bus/platform/devices/*.ufs/attributes/wb_cur_buf
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the amount of unused current buffer.
@ -1251,6 +1366,7 @@ Description: This entry shows the amount of unused current buffer.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_flush_status
What: /sys/bus/platform/devices/*.ufs/attributes/wb_flush_status
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows the flush operation status.
@ -1267,6 +1383,7 @@ Description: This entry shows the flush operation status.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_life_time_est
What: /sys/bus/platform/devices/*.ufs/attributes/wb_life_time_est
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
Description: This entry shows an indication of the WriteBooster Buffer
@ -1289,6 +1406,7 @@ Description: This entry shows the configured size of WriteBooster buffer.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/wb_on
What: /sys/bus/platform/devices/*.ufs/wb_on
Date: January 2021
Contact: Bean Huo <beanhuo@micron.com>
Description: This node is used to set or display whether UFS WriteBooster is
@ -1300,6 +1418,7 @@ Description: This node is used to set or display whether UFS WriteBooster is
disable/enable WriteBooster through this sysfs node.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/hpb_version
What: /sys/bus/platform/devices/*.ufs/device_descriptor/hpb_version
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the HPB specification version.
@ -1310,6 +1429,7 @@ Description: This entry shows the HPB specification version.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/hpb_control
What: /sys/bus/platform/devices/*.ufs/device_descriptor/hpb_control
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows an indication of the HPB control mode.
@ -1319,6 +1439,7 @@ Description: This entry shows an indication of the HPB control mode.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_region_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_region_size
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the bHPBRegionSize which can be calculated
@ -1328,6 +1449,7 @@ Description: This entry shows the bHPBRegionSize which can be calculated
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_number_lu
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_number_lu
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the maximum number of HPB LU supported by
@ -1338,6 +1460,7 @@ Description: This entry shows the maximum number of HPB LU supported by
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_subregion_size
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_subregion_size
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the bHPBSubRegionSize, which can be
@ -1349,6 +1472,7 @@ Description: This entry shows the bHPBSubRegionSize, which can be
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_max_active_regions
What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_max_active_regions
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the maximum number of active HPB regions that
@ -1434,6 +1558,7 @@ Description: This entry shows the requeue timeout threshold for write buffer
this entry.
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_size_hpb_single_cmd
What: /sys/bus/platform/devices/*.ufs/attributes/max_data_size_hpb_single_cmd
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the maximum HPB data size for using a single HPB
@ -1450,6 +1575,7 @@ Description: This entry shows the maximum HPB data size for using a single HPB
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/hpb_enable
What: /sys/bus/platform/devices/*.ufs/flags/hpb_enable
Date: June 2021
Contact: Daejun Park <daejun7.park@samsung.com>
Description: This entry shows the status of HPB.

16
Documentation/ABI/testing/sysfs-firmware-efi-esrt
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@ -24,14 +24,14 @@ Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The version of the ESRT structure provided by the firmware.
What: /sys/firmware/efi/esrt/entries/entry$N/
What: /sys/firmware/efi/esrt/entries/entry<N>/
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: Each ESRT entry is identified by a GUID, and each gets a
subdirectory under entries/ .
example: /sys/firmware/efi/esrt/entries/entry0/
What: /sys/firmware/efi/esrt/entries/entry$N/fw_type
What: /sys/firmware/efi/esrt/entries/entry<N>/fw_type
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: What kind of firmware entry this is:
@ -43,33 +43,33 @@ Description: What kind of firmware entry this is:
3 UEFI Driver
== ===============
What: /sys/firmware/efi/esrt/entries/entry$N/fw_class
What: /sys/firmware/efi/esrt/entries/entry<N>/fw_class
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: This is the entry's guid, and will match the directory name.
What: /sys/firmware/efi/esrt/entries/entry$N/fw_version
What: /sys/firmware/efi/esrt/entries/entry<N>/fw_version
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The version of the firmware currently installed. This is a
32-bit unsigned integer.
What: /sys/firmware/efi/esrt/entries/entry$N/lowest_supported_fw_version
What: /sys/firmware/efi/esrt/entries/entry<N>/lowest_supported_fw_version
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The lowest version of the firmware that can be installed.
What: /sys/firmware/efi/esrt/entries/entry$N/capsule_flags
What: /sys/firmware/efi/esrt/entries/entry<N>/capsule_flags
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: Flags that must be passed to UpdateCapsule()
What: /sys/firmware/efi/esrt/entries/entry$N/last_attempt_version
What: /sys/firmware/efi/esrt/entries/entry<N>/last_attempt_version
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The last firmware version for which an update was attempted.
What: /sys/firmware/efi/esrt/entries/entry$N/last_attempt_status
What: /sys/firmware/efi/esrt/entries/entry<N>/last_attempt_status
Date: February 2015
Contact: Peter Jones <pjones@redhat.com>
Description: The result of the last firmware update attempt for the

115
Documentation/ABI/testing/sysfs-kernel-slab
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@ -10,7 +10,7 @@ Description:
any cache it aliases, if any).
Users: kernel memory tuning tools
What: /sys/kernel/slab/cache/aliases
What: /sys/kernel/slab/<cache>/aliases
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -19,7 +19,7 @@ Description:
The aliases file is read-only and specifies how many caches
have merged into this cache.
What: /sys/kernel/slab/cache/align
What: /sys/kernel/slab/<cache>/align
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -28,7 +28,7 @@ Description:
The align file is read-only and specifies the cache's object
alignment in bytes.
What: /sys/kernel/slab/cache/alloc_calls
What: /sys/kernel/slab/<cache>/alloc_calls
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -39,7 +39,7 @@ Description:
The alloc_calls file only contains information if debugging is
enabled for that cache (see Documentation/vm/slub.rst).
What: /sys/kernel/slab/cache/alloc_fastpath
What: /sys/kernel/slab/<cache>/alloc_fastpath
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -50,7 +50,7 @@ Description:
current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/alloc_from_partial
What: /sys/kernel/slab/<cache>/alloc_from_partial
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -62,7 +62,7 @@ Description:
count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/alloc_refill
What: /sys/kernel/slab/<cache>/alloc_refill
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -73,7 +73,7 @@ Description:
remote cpu frees. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/alloc_slab
What: /sys/kernel/slab/<cache>/alloc_slab
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -84,7 +84,7 @@ Description:
clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/alloc_slowpath
What: /sys/kernel/slab/<cache>/alloc_slowpath
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -96,7 +96,7 @@ Description:
clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/cache_dma
What: /sys/kernel/slab/<cache>/cache_dma
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -106,7 +106,7 @@ Description:
are from ZONE_DMA.
Available when CONFIG_ZONE_DMA is enabled.
What: /sys/kernel/slab/cache/cpu_slabs
What: /sys/kernel/slab/<cache>/cpu_slabs
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -115,7 +115,7 @@ Description:
The cpu_slabs file is read-only and displays how many cpu slabs
are active and their NUMA locality.
What: /sys/kernel/slab/cache/cpuslab_flush
What: /sys/kernel/slab/<cache>/cpuslab_flush
Date: April 2009
KernelVersion: 2.6.31
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -128,7 +128,7 @@ Description:
current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/ctor
What: /sys/kernel/slab/<cache>/ctor
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -138,7 +138,7 @@ Description:
constructor function, which is invoked for each object when a
new slab is allocated.
What: /sys/kernel/slab/cache/deactivate_empty
What: /sys/kernel/slab/<cache>/deactivate_empty
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -148,7 +148,7 @@ Description:
was deactivated. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/deactivate_full
What: /sys/kernel/slab/<cache>/deactivate_full
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -158,7 +158,7 @@ Description:
was deactivated. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/deactivate_remote_frees
What: /sys/kernel/slab/<cache>/deactivate_remote_frees
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -169,7 +169,7 @@ Description:
remotely. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/deactivate_to_head
What: /sys/kernel/slab/<cache>/deactivate_to_head
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -180,7 +180,7 @@ Description:
list. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/deactivate_to_tail
What: /sys/kernel/slab/<cache>/deactivate_to_tail
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -191,7 +191,7 @@ Description:
list. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/destroy_by_rcu
What: /sys/kernel/slab/<cache>/destroy_by_rcu
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -200,7 +200,7 @@ Description:
The destroy_by_rcu file is read-only and specifies whether
slabs (not objects) are freed by rcu.
What: /sys/kernel/slab/cache/free_add_partial
What: /sys/kernel/slab/<cache>/free_add_partial
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -211,7 +211,7 @@ Description:
partial list. It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/free_calls
What: /sys/kernel/slab/<cache>/free_calls
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -221,7 +221,7 @@ Description:
object frees if slab debugging is enabled (see
Documentation/vm/slub.rst).
What: /sys/kernel/slab/cache/free_fastpath
What: /sys/kernel/slab/<cache>/free_fastpath
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -232,7 +232,7 @@ Description:
It can be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/free_frozen
What: /sys/kernel/slab/<cache>/free_frozen
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -243,7 +243,7 @@ Description:
clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/free_remove_partial
What: /sys/kernel/slab/<cache>/free_remove_partial
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -255,7 +255,7 @@ Description:
count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/free_slab
What: /sys/kernel/slab/<cache>/free_slab
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -266,7 +266,7 @@ Description:
the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/free_slowpath
What: /sys/kernel/slab/<cache>/free_slowpath
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -277,7 +277,7 @@ Description:
be written to clear the current count.
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/hwcache_align
What: /sys/kernel/slab/<cache>/hwcache_align
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -286,7 +286,7 @@ Description:
The hwcache_align file is read-only and specifies whether
objects are aligned on cachelines.
What: /sys/kernel/slab/cache/min_partial
What: /sys/kernel/slab/<cache>/min_partial
Date: February 2009
KernelVersion: 2.6.30
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -297,7 +297,7 @@ Description:
allocating new slabs. Such slabs may be reclaimed by utilizing
the shrink file.
What: /sys/kernel/slab/cache/object_size
What: /sys/kernel/slab/<cache>/object_size
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -306,7 +306,7 @@ Description:
The object_size file is read-only and specifies the cache's
object size.
What: /sys/kernel/slab/cache/objects
What: /sys/kernel/slab/<cache>/objects
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -315,7 +315,7 @@ Description:
The objects file is read-only and displays how many objects are
active and from which nodes they are from.
What: /sys/kernel/slab/cache/objects_partial
What: /sys/kernel/slab/<cache>/objects_partial
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -325,7 +325,7 @@ Description:
objects are on partial slabs and from which nodes they are
from.
What: /sys/kernel/slab/cache/objs_per_slab
What: /sys/kernel/slab/<cache>/objs_per_slab
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -333,9 +333,9 @@ Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
Description:
The file objs_per_slab is read-only and specifies how many
objects may be allocated from a single slab of the order
specified in /sys/kernel/slab/cache/order.
specified in /sys/kernel/slab/<cache>/order.
What: /sys/kernel/slab/cache/order
What: /sys/kernel/slab/<cache>/order
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -352,7 +352,7 @@ Description:
order is used and this sysfs entry can not be used to change
the order at run time.
What: /sys/kernel/slab/cache/order_fallback
What: /sys/kernel/slab/<cache>/order_fallback
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -365,7 +365,7 @@ Description:
Available when CONFIG_SLUB_STATS is enabled.
What: /sys/kernel/slab/cache/partial
What: /sys/kernel/slab/<cache>/partial
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -374,7 +374,7 @@ Description:
The partial file is read-only and displays how long many
partial slabs there are and how long each node's list is.
What: /sys/kernel/slab/cache/poison
What: /sys/kernel/slab/<cache>/poison
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -383,7 +383,7 @@ Description:
The poison file specifies whether objects should be poisoned
when a new slab is allocated.
What: /sys/kernel/slab/cache/reclaim_account
What: /sys/kernel/slab/<cache>/reclaim_account
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -392,7 +392,7 @@ Description:
The reclaim_account file specifies whether the cache's objects
are reclaimable (and grouped by their mobility).
What: /sys/kernel/slab/cache/red_zone
What: /sys/kernel/slab/<cache>/red_zone
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -401,7 +401,7 @@ Description:
The red_zone file specifies whether the cache's objects are red
zoned.
What: /sys/kernel/slab/cache/remote_node_defrag_ratio
What: /sys/kernel/slab/<cache>/remote_node_defrag_ratio
Date: January 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -415,7 +415,7 @@ Description:
Available when CONFIG_NUMA is enabled.
What: /sys/kernel/slab/cache/sanity_checks
What: /sys/kernel/slab/<cache>/sanity_checks
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -426,7 +426,7 @@ Description:
checks. Caches that enable sanity_checks cannot be merged with
caches that do not.
What: /sys/kernel/slab/cache/shrink
What: /sys/kernel/slab/<cache>/shrink
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -442,7 +442,7 @@ Description:
adversely impact other running applications. So it
should be used with care.
What: /sys/kernel/slab/cache/slab_size
What: /sys/kernel/slab/<cache>/slab_size
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -451,7 +451,7 @@ Description:
The slab_size file is read-only and specifies the object size
with metadata (debugging information and alignment) in bytes.
What: /sys/kernel/slab/cache/slabs
What: /sys/kernel/slab/<cache>/slabs
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -461,7 +461,7 @@ Description:
there are (both cpu and partial) and from which nodes they are
from.
What: /sys/kernel/slab/cache/store_user
What: /sys/kernel/slab/<cache>/store_user
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -470,7 +470,7 @@ Description:
The store_user file specifies whether the location of
allocation or free should be tracked for a cache.
What: /sys/kernel/slab/cache/total_objects
What: /sys/kernel/slab/<cache>/total_objects
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -479,7 +479,7 @@ Description:
The total_objects file is read-only and displays how many total
objects a cache has and from which nodes they are from.
What: /sys/kernel/slab/cache/trace
What: /sys/kernel/slab/<cache>/trace
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -488,7 +488,7 @@ Description:
The trace file specifies whether object allocations and frees
should be traced.
What: /sys/kernel/slab/cache/validate
What: /sys/kernel/slab/<cache>/validate
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
@ -496,3 +496,24 @@ Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
Description:
Writing to the validate file causes SLUB to traverse all of its
cache's objects and check the validity of metadata.
What: /sys/kernel/slab/<cache>/usersize
Date: Jun 2017
Contact: David Windsor <dave@nullcore.net>
Description:
The usersize file is read-only and contains the usercopy
region size.
What: /sys/kernel/slab/<cache>/slabs_cpu_partial
Date: Aug 2011
Contact: Christoph Lameter <cl@linux.com>
Description:
This read-only file shows the number of partialli allocated
frozen slabs.
What: /sys/kernel/slab/<cache>/cpu_partial
Date: Aug 2011
Contact: Christoph Lameter <cl@linux.com>
Description:
This read-only file shows the number of per cpu partial
pages to keep around.

129
Documentation/ABI/testing/sysfs-mce Normal file
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@ -0,0 +1,129 @@
What: /sys/devices/system/machinecheck/machinecheckX/
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
(X = CPU number)
Machine checks report internal hardware error conditions
detected by the CPU. Uncorrected errors typically cause a
machine check (often with panic), corrected ones cause a
machine check log entry.
For more details about the x86 machine check architecture
see the Intel and AMD architecture manuals from their
developer websites.
For more details about the architecture
see http://one.firstfloor.org/~andi/mce.pdf
Each CPU has its own directory.
What: /sys/devices/system/machinecheck/machinecheckX/bank<Y>
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
(Y bank number)
64bit Hex bitmask enabling/disabling specific subevents for
bank Y.
When a bit in the bitmask is zero then the respective
subevent will not be reported.
By default all events are enabled.
Note that BIOS maintain another mask to disable specific events
per bank. This is not visible here
What: /sys/devices/system/machinecheck/machinecheckX/check_interval
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
The entries appear for each CPU, but they are truly shared
between all CPUs.
How often to poll for corrected machine check errors, in
seconds (Note output is hexadecimal). Default 5 minutes.
When the poller finds MCEs it triggers an exponential speedup
(poll more often) on the polling interval. When the poller
stops finding MCEs, it triggers an exponential backoff
(poll less often) on the polling interval. The check_interval
variable is both the initial and maximum polling interval.
0 means no polling for corrected machine check errors
(but some corrected errors might be still reported
in other ways)
What: /sys/devices/system/machinecheck/machinecheckX/tolerant
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
The entries appear for each CPU, but they are truly shared
between all CPUs.
Tolerance level. When a machine check exception occurs for a
non corrected machine check the kernel can take different
actions.
Since machine check exceptions can happen any time it is
sometimes risky for the kernel to kill a process because it
defies normal kernel locking rules. The tolerance level
configures how hard the kernel tries to recover even at some
risk of deadlock. Higher tolerant values trade potentially
better uptime with the risk of a crash or even corruption
(for tolerant >= 3).
== ===========================================================
0 always panic on uncorrected errors, log corrected errors
1 panic or SIGBUS on uncorrected errors, log corrected errors
2 SIGBUS or log uncorrected errors, log corrected errors
3 never panic or SIGBUS, log all errors (for testing only)
== ===========================================================
Default: 1
Note this only makes a difference if the CPU allows recovery
from a machine check exception. Current x86 CPUs generally
do not.
What: /sys/devices/system/machinecheck/machinecheckX/trigger
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
The entries appear for each CPU, but they are truly shared
between all CPUs.
Program to run when a machine check event is detected.
This is an alternative to running mcelog regularly from cron
and allows to detect events faster.
What: /sys/devices/system/machinecheck/machinecheckX/monarch_timeout
Contact: Andi Kleen <ak@linux.intel.com>
Date: Feb, 2007
Description:
How long to wait for the other CPUs to machine check too on a
exception. 0 to disable waiting for other CPUs.
Unit: us
What: /sys/devices/system/machinecheck/machinecheckX/ignore_ce
Contact: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Date: Jun 2009
Description:
Disables polling and CMCI for corrected errors.
All corrected events are not cleared and kept in bank MSRs.
What: /sys/devices/system/machinecheck/machinecheckX/dont_log_ce
Contact: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Date: Jun 2009
Description:
Disables logging for corrected errors.
All reported corrected errors will be cleared silently.
This option will be useful if you never care about corrected
errors.
What: /sys/devices/system/machinecheck/machinecheckX/cmci_disabled
Contact: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Date: Jun 2009
Description:
Disables the CMCI feature.

7
Documentation/ABI/testing/sysfs-module
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@ -41,6 +41,13 @@ KernelVersion: 3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module size in bytes.
What: /sys/module/*/initstate
Date: Nov 2006
KernelVersion: 2.6.19
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Show the initialization state(live, coming, going) of
the module.
What: /sys/module/*/taint
Date: Jan 2012
KernelVersion: 3.3

4
Documentation/ABI/testing/sysfs-platform-dptf
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@ -133,7 +133,10 @@ Contact: linux-acpi@vger.kernel.org
Description:
(RO) Presents SSC (spread spectrum clock) information for EMI
(Electro magnetic interference) control. This is a bit mask.
======= ==========================================
Bits Description
======= ==========================================
[7:0] Sets clock spectrum spread percentage:
0x00=0.2% , 0x3F=10%
1 LSB = 0.1% increase in spread (for
@ -151,3 +154,4 @@ Description:
[10] 0: No white noise. 1: Add white noise
to spread waveform
[11] When 1, future writes are ignored.
======= ==========================================

2
Documentation/ABI/testing/sysfs-platform-sst-atom
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@ -1,4 +1,4 @@
What: /sys/devices/platform/8086%x:00/firmware_version
What: /sys/devices/platform/8086<x>:00/firmware_version
Date: November 2016
KernelVersion: 4.10
Contact: "Sebastien Guiriec" <sebastien.guiriec@intel.com>

30
Documentation/ABI/testing/sysfs-ptp
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@ -6,7 +6,7 @@ Description:
providing a standardized interface to the ancillary
features of PTP hardware clocks.
What: /sys/class/ptp/ptpN/
What: /sys/class/ptp/ptp<N>/
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -14,7 +14,7 @@ Description:
hardware clock registered into the PTP class driver
subsystem.
What: /sys/class/ptp/ptpN/clock_name
What: /sys/class/ptp/ptp<N>/clock_name
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -25,7 +25,7 @@ Description:
MAC based ones. The string does not necessarily have
to be any kind of unique id.
What: /sys/class/ptp/ptpN/max_adjustment
What: /sys/class/ptp/ptp<N>/max_adjustment
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -33,42 +33,42 @@ Description:
frequency adjustment value (a positive integer) in
parts per billion.
What: /sys/class/ptp/ptpN/max_vclocks
What: /sys/class/ptp/ptp<N>/max_vclocks
Date: May 2021
Contact: Yangbo Lu <yangbo.lu@nxp.com>
Description:
This file contains the maximum number of ptp vclocks.
Write integer to re-configure it.
What: /sys/class/ptp/ptpN/n_alarms
What: /sys/class/ptp/ptp<N>/n_alarms
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
This file contains the number of periodic or one shot
alarms offer by the PTP hardware clock.
What: /sys/class/ptp/ptpN/n_external_timestamps
What: /sys/class/ptp/ptp<N>/n_external_timestamps
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
This file contains the number of external timestamp
channels offered by the PTP hardware clock.
What: /sys/class/ptp/ptpN/n_periodic_outputs
What: /sys/class/ptp/ptp<N>/n_periodic_outputs
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
This file contains the number of programmable periodic
output channels offered by the PTP hardware clock.
What: /sys/class/ptp/ptpN/n_pins
What: /sys/class/ptp/ptp<N>/n_pins
Date: March 2014
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
This file contains the number of programmable pins
offered by the PTP hardware clock.
What: /sys/class/ptp/ptpN/n_vclocks
What: /sys/class/ptp/ptp<N>/n_vclocks
Date: May 2021
Contact: Yangbo Lu <yangbo.lu@nxp.com>
Description:
@ -81,7 +81,7 @@ Description:
switches the physical clock back to normal, adjustable
operation.
What: /sys/class/ptp/ptpN/pins
What: /sys/class/ptp/ptp<N>/pins
Date: March 2014
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -94,7 +94,7 @@ Description:
assignment may be changed by two writing numbers into
the file.
What: /sys/class/ptp/ptpN/pps_available
What: /sys/class/ptp/ptp<N>/pps_available
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -103,7 +103,7 @@ Description:
"1" means that the PPS is supported, while "0" means
not supported.
What: /sys/class/ptp/ptpN/extts_enable
What: /sys/class/ptp/ptp<N>/extts_enable
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -113,7 +113,7 @@ Description:
To disable external timestamps, write the channel
index followed by a "0" into the file.
What: /sys/class/ptp/ptpN/fifo
What: /sys/class/ptp/ptp<N>/fifo
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -121,7 +121,7 @@ Description:
the form of three integers: channel index, seconds,
and nanoseconds.
What: /sys/class/ptp/ptpN/period
What: /sys/class/ptp/ptp<N>/period
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:
@ -132,7 +132,7 @@ Description:
period nanoseconds. To disable a periodic output, set
all the seconds and nanoseconds values to zero.
What: /sys/class/ptp/ptpN/pps_enable
What: /sys/class/ptp/ptp<N>/pps_enable
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>
Description:

32
Documentation/ABI/testing/sysfs-tty
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@ -9,7 +9,7 @@ Description:
The file supports poll() to detect virtual
console switches.
What: /sys/class/tty/tty0/active
What: /sys/class/tty/tty<x>/active
Date: Nov 2010
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description:
@ -18,7 +18,7 @@ Description:
The file supports poll() to detect virtual
console switches.
What: /sys/class/tty/ttyS0/uartclk
What: /sys/class/tty/ttyS<x>/uartclk
Date: Sep 2012
Contact: Tomas Hlavacek <tmshlvck@gmail.com>
Description:
@ -29,7 +29,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/type
What: /sys/class/tty/ttyS<x>/type
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -38,7 +38,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/line
What: /sys/class/tty/ttyS<x>/line
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -47,7 +47,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/port
What: /sys/class/tty/ttyS<x>/port
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -56,7 +56,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/irq
What: /sys/class/tty/ttyS<x>/irq
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -65,7 +65,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/flags
What: /sys/class/tty/ttyS<x>/flags
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -74,7 +74,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/xmit_fifo_size
What: /sys/class/tty/ttyS<x>/xmit_fifo_size
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -83,7 +83,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/close_delay
What: /sys/class/tty/ttyS<x>/close_delay
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -92,7 +92,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/closing_wait
What: /sys/class/tty/ttyS<x>/closing_wait
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -101,7 +101,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/custom_divisor
What: /sys/class/tty/ttyS<x>/custom_divisor
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -110,7 +110,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/io_type
What: /sys/class/tty/ttyS<x>/io_type
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -120,7 +120,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/iomem_base
What: /sys/class/tty/ttyS<x>/iomem_base
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -129,7 +129,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/iomem_reg_shift
What: /sys/class/tty/ttyS<x>/iomem_reg_shift
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
@ -139,7 +139,7 @@ Description:
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/rx_trig_bytes
What: /sys/class/tty/ttyS<x>/rx_trig_bytes
Date: May 2014
Contact: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Description:
@ -155,7 +155,7 @@ Description:
16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
automatically changed to 4 bytes.
What: /sys/class/tty/ttyS0/console
What: /sys/class/tty/ttyS<x>/console
Date: February 2020
Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Description:

15
Documentation/admin-guide/dynamic-debug-howto.rst
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@ -249,8 +249,7 @@ Debug messages during Boot Process
To activate debug messages for core code and built-in modules during
the boot process, even before userspace and debugfs exists, use
``dyndbg="QUERY"``, ``module.dyndbg="QUERY"``, or ``ddebug_query="QUERY"``
(``ddebug_query`` is obsoleted by ``dyndbg``, and deprecated). QUERY follows
``dyndbg="QUERY"`` or ``module.dyndbg="QUERY"``. QUERY follows
the syntax described above, but must not exceed 1023 characters. Your
bootloader may impose lower limits.
@ -270,8 +269,7 @@ this boot parameter for debugging purposes.
If ``foo`` module is not built-in, ``foo.dyndbg`` will still be processed at
boot time, without effect, but will be reprocessed when module is
loaded later. ``ddebug_query=`` and bare ``dyndbg=`` are only processed at
boot.
loaded later. Bare ``dyndbg=`` is only processed at boot.
Debug Messages at Module Initialization Time
@ -358,8 +356,11 @@ Examples
// boot-args example, with newlines and comments for readability
Kernel command line: ...
// see whats going on in dyndbg=value processing
dynamic_debug.verbose=1
// enable pr_debugs in 2 builtins, #cmt is stripped
dyndbg="module params +p #cmt ; module sys +p"
dynamic_debug.verbose=3
// enable pr_debugs in the btrfs module (can be builtin or loadable)
btrfs.dyndbg="+p"
// enable pr_debugs in all files under init/
// and the function parse_one, #cmt is stripped
dyndbg="file init/* +p #cmt ; func parse_one +p"
// enable pr_debugs in 2 functions in a module loaded later
pc87360.dyndbg="func pc87360_init_device +p; func pc87360_find +p"

5
Documentation/admin-guide/kernel-parameters.txt
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@ -841,11 +841,6 @@
Format: <port#>,<type>
See also Documentation/input/devices/joystick-parport.rst
ddebug_query= [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
time. See
Documentation/admin-guide/dynamic-debug-howto.rst for
details. Deprecated, see dyndbg.
debug [KNL] Enable kernel debugging (events log level).
debug_boot_weak_hash

596
Documentation/hwmon/sysfs-interface.rst
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@ -89,6 +89,8 @@ hardware implementation.
All entries (except name) are optional, and should only be created in a
given driver if the chip has the feature.
See Documentation/ABI/testing/sysfs-class-hwmon for a complete description
of the attributes.
*****************
Global attributes
@ -96,22 +98,9 @@ Global attributes
`name`
The chip name.
This should be a short, lowercase string, not containing
whitespace, dashes, or the wildcard character '*'.
This attribute represents the chip name. It is the only
mandatory attribute.
I2C devices get this attribute created automatically.
RO
`update_interval`
The interval at which the chip will update readings.
Unit: millisecond
RW
Some devices have a variable update rate or interval.
This attribute can be used to change it to the desired value.
********
@ -121,148 +110,51 @@ Voltages
`in[0-*]_min`
Voltage min value.
Unit: millivolt
RW
`in[0-*]_lcrit`
Voltage critical min value.
Unit: millivolt
RW
If voltage drops to or below this limit, the system may
take drastic action such as power down or reset. At the very
least, it should report a fault.
`in[0-*]_max`
Voltage max value.
Unit: millivolt
RW
`in[0-*]_crit`
Voltage critical max value.
Unit: millivolt
RW
If voltage reaches or exceeds this limit, the system may
take drastic action such as power down or reset. At the very
least, it should report a fault.
`in[0-*]_input`
Voltage input value.
Unit: millivolt
RO
Voltage measured on the chip pin.
Actual voltage depends on the scaling resistors on the
motherboard, as recommended in the chip datasheet.
This varies by chip and by motherboard.
Because of this variation, values are generally NOT scaled
by the chip driver, and must be done by the application.
However, some drivers (notably lm87 and via686a)
do scale, because of internal resistors built into a chip.
These drivers will output the actual voltage. Rule of
thumb: drivers should report the voltage values at the
"pins" of the chip.
`in[0-*]_average`
Average voltage
Unit: millivolt
RO
`in[0-*]_lowest`
Historical minimum voltage
Unit: millivolt
RO
`in[0-*]_highest`
Historical maximum voltage
Unit: millivolt
RO
`in[0-*]_reset_history`
Reset inX_lowest and inX_highest
WO
`in_reset_history`
Reset inX_lowest and inX_highest for all sensors
WO
`in[0-*]_label`
Suggested voltage channel label.
Text string
Should only be created if the driver has hints about what
this voltage channel is being used for, and user-space
doesn't. In all other cases, the label is provided by
user-space.
RO
`in[0-*]_enable`
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
`cpu[0-*]_vid`
CPU core reference voltage.
Unit: millivolt
RO
Not always correct.
`vrm`
Voltage Regulator Module version number.
RW (but changing it should no more be necessary)
Originally the VRM standard version multiplied by 10, but now
an arbitrary number, as not all standards have a version
number.
Affects the way the driver calculates the CPU core reference
voltage from the vid pins.
`in[0-*]_rated_min`
Minimum rated voltage.
Unit: millivolt
RO
`in[0-*]_rated_max`
Maximum rated voltage.
Unit: millivolt
RO
Also see the Alarms section for status flags associated with voltages.
@ -273,83 +165,27 @@ Fans
`fan[1-*]_min`
Fan minimum value
Unit: revolution/min (RPM)
RW
`fan[1-*]_max`
Fan maximum value
Unit: revolution/min (RPM)
Only rarely supported by the hardware.
RW
`fan[1-*]_input`
Fan input value.
Unit: revolution/min (RPM)
RO
`fan[1-*]_div`
Fan divisor.
Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
RW
Some chips only support values 1, 2, 4 and 8.
Note that this is actually an internal clock divisor, which
affects the measurable speed range, not the read value.
`fan[1-*]_pulses`
Number of tachometer pulses per fan revolution.
Integer value, typically between 1 and 4.
RW
This value is a characteristic of the fan connected to the
device's input, so it has to be set in accordance with the fan
model.
Should only be created if the chip has a register to configure
the number of pulses. In the absence of such a register (and
thus attribute) the value assumed by all devices is 2 pulses
per fan revolution.
`fan[1-*]_target`
Desired fan speed
Unit: revolution/min (RPM)
RW
Only makes sense if the chip supports closed-loop fan speed
control based on the measured fan speed.
`fan[1-*]_label`
Suggested fan channel label.
Text string
Should only be created if the driver has hints about what
this fan channel is being used for, and user-space doesn't.
In all other cases, the label is provided by user-space.
RO
`fan[1-*]_enable`
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
Also see the Alarms section for status flags associated with fans.
@ -360,63 +196,25 @@ PWM
`pwm[1-*]`
Pulse width modulation fan control.
Integer value in the range 0 to 255
RW
255 is max or 100%.
`pwm[1-*]_enable`
Fan speed control method:
- 0: no fan speed control (i.e. fan at full speed)
- 1: manual fan speed control enabled (using `pwm[1-*]`)
- 2+: automatic fan speed control enabled
Check individual chip documentation files for automatic mode
details.
RW
`pwm[1-*]_mode`
- 0: DC mode (direct current)
- 1: PWM mode (pulse-width modulation)
RW
direct current or pulse-width modulation.
`pwm[1-*]_freq`
Base PWM frequency in Hz.
Only possibly available when pwmN_mode is PWM, but not always
present even then.
RW
`pwm[1-*]_auto_channels_temp`
Select which temperature channels affect this PWM output in
auto mode.
Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
Which values are possible depend on the chip used.
RW
`pwm[1-*]_auto_point[1-*]_pwm` / `pwm[1-*]_auto_point[1-*]_temp` / `pwm[1-*]_auto_point[1-*]_temp_hyst`
Define the PWM vs temperature curve.
Number of trip points is chip-dependent. Use this for chips
which associate trip points to PWM output channels.
RW
`temp[1-*]_auto_point[1-*]_pwm` / `temp[1-*]_auto_point[1-*]_temp` / `temp[1-*]_auto_point[1-*]_temp_hyst`
Define the PWM vs temperature curve.
Number of trip points is chip-dependent. Use this for chips
which associate trip points to temperature channels.
RW
There is a third case where trip points are associated to both PWM output
channels and temperature channels: the PWM values are associated to PWM
output channels while the temperature values are associated to temperature
@ -434,182 +232,70 @@ Temperatures
`temp[1-*]_type`
Sensor type selection.
Integers 1 to 6
RW
- 1: CPU embedded diode
- 2: 3904 transistor
- 3: thermal diode
- 4: thermistor
- 5: AMD AMDSI
- 6: Intel PECI
Not all types are supported by all chips
`temp[1-*]_max`
Temperature max value.
Unit: millidegree Celsius (or millivolt, see below)
RW
`temp[1-*]_min`
Temperature min value.
Unit: millidegree Celsius
RW
`temp[1-*]_max_hyst`
Temperature hysteresis value for max limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the max value.
RW
`temp[1-*]_min_hyst`
Temperature hysteresis value for min limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the min value.
RW
`temp[1-*]_input`
Temperature input value.
Unit: millidegree Celsius
RO
Temperature input value.
`temp[1-*]_crit`
Temperature critical max value, typically greater than
corresponding temp_max values.
Unit: millidegree Celsius
RW
`temp[1-*]_crit_hyst`
Temperature hysteresis value for critical limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the critical value.
RW
`temp[1-*]_emergency`
Temperature emergency max value, for chips supporting more than
two upper temperature limits. Must be equal or greater than
corresponding temp_crit values.
Unit: millidegree Celsius
RW
two upper temperature limits.
`temp[1-*]_emergency_hyst`
Temperature hysteresis value for emergency limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the emergency value.
RW
`temp[1-*]_lcrit`
Temperature critical min value, typically lower than
corresponding temp_min values.
Unit: millidegree Celsius
RW
`temp[1-*]_lcrit_hyst`
Temperature hysteresis value for critical min limit.
Unit: millidegree Celsius
Must be reported as an absolute temperature, NOT a delta
from the critical min value.
RW
`temp[1-*]_offset`
Temperature offset which is added to the temperature reading
by the chip.
Unit: millidegree Celsius
Read/Write value.
`temp[1-*]_label`
Suggested temperature channel label.
Text string
Should only be created if the driver has hints about what
this temperature channel is being used for, and user-space
doesn't. In all other cases, the label is provided by
user-space.
RO
`temp[1-*]_lowest`
Historical minimum temperature
Unit: millidegree Celsius
RO
`temp[1-*]_highest`
Historical maximum temperature
Unit: millidegree Celsius
RO
`temp[1-*]_reset_history`
Reset temp_lowest and temp_highest
WO
`temp_reset_history`
Reset temp_lowest and temp_highest for all sensors
WO
`temp[1-*]_enable`
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
`temp[1-*]_rated_min`
Minimum rated temperature.
Unit: millidegree Celsius
RO
`temp[1-*]_rated_max`
Maximum rated temperature.
Unit: millidegree Celsius
RO
Some chips measure temperature using external thermistors and an ADC, and
report the temperature measurement as a voltage. Converting this voltage
back to a temperature (or the other way around for limits) requires
@ -627,58 +313,28 @@ Currents
********
`curr[1-*]_max`
Current max value
Unit: milliampere
RW
Current max value.
`curr[1-*]_min`
Current min value.
Unit: milliampere
RW
`curr[1-*]_lcrit`
Current critical low value
Unit: milliampere
RW
`curr[1-*]_crit`
Current critical high value.
Unit: milliampere
RW
`curr[1-*]_input`
Current input value
Unit: milliampere
RO
Current input value.
`curr[1-*]_average`
Average current use
Unit: milliampere
RO
Average current use.
`curr[1-*]_lowest`
Historical minimum current
Unit: milliampere
RO
Historical minimum current.
`curr[1-*]_highest`
Historical maximum current
Unit: milliampere
RO
Historical maximum current.
`curr[1-*]_reset_history`
Reset currX_lowest and currX_highest
@ -686,34 +342,17 @@ Currents
WO
`curr_reset_history`
Reset currX_lowest and currX_highest for all sensors
WO
Reset currX_lowest and currX_highest for all sensors.
`curr[1-*]_enable`
Enable or disable the sensors.
When disabled the sensor read will return -ENODATA.
- 1: Enable
- 0: Disable
RW
`curr[1-*]_rated_min`
Minimum rated current.
Unit: milliampere
RO
`curr[1-*]_rated_max`
Maximum rated current.
Unit: milliampere
RO
Also see the Alarms section for status flags associated with currents.
*****
@ -721,141 +360,62 @@ Power
*****
`power[1-*]_average`
Average power use
Unit: microWatt
RO
Average power use.
`power[1-*]_average_interval`
Power use averaging interval. A poll
notification is sent to this file if the
hardware changes the averaging interval.
Unit: milliseconds
RW
Power use averaging interval.
`power[1-*]_average_interval_max`
Maximum power use averaging interval
Unit: milliseconds
RO
Maximum power use averaging interval.
`power[1-*]_average_interval_min`
Minimum power use averaging interval
Unit: milliseconds
RO
Minimum power use averaging interval.
`power[1-*]_average_highest`
Historical average maximum power use
Unit: microWatt
RO
Historical average maximum power use
`power[1-*]_average_lowest`
Historical average minimum power use
Unit: microWatt
RO
Historical average minimum power use
`power[1-*]_average_max`
A poll notification is sent to
`power[1-*]_average` when power use
rises above this value.
Unit: microWatt
RW
A poll notification is sent to `power[1-*]_average` when
power use rises above this value.
`power[1-*]_average_min`
A poll notification is sent to
`power[1-*]_average` when power use
sinks below this value.
Unit: microWatt
RW
A poll notification is sent to `power[1-*]_average` when
power use sinks below this value.
`power[1-*]_input`
Instantaneous power use
Unit: microWatt
RO
Instantaneous power use.
`power[1-*]_input_highest`
Historical maximum power use
Unit: microWatt
RO
Historical maximum power use
`power[1-*]_input_lowest`
Historical minimum power use
Unit: microWatt
RO
Historical minimum power use.
`power[1-*]_reset_history`
Reset input_highest, input_lowest,
average_highest and average_lowest.
WO
Reset input_highest, input_lowest, average_highest and
average_lowest.
`power[1-*]_accuracy`
Accuracy of the power meter.
Unit: Percent
RO
Accuracy of the power meter.
`power[1-*]_cap`
If power use rises above this limit, the
system should take action to reduce power use.
A poll notification is sent to this file if the
cap is changed by the hardware. The `*_cap`
files only appear if the cap is known to be
enforced by hardware.
Unit: microWatt
RW
If power use rises above this limit, the
system should take action to reduce power use.
`power[1-*]_cap_hyst`
Margin of hysteresis built around capping and
notification.
Unit: microWatt
RW
Margin of hysteresis built around capping and notification.
`power[1-*]_cap_max`
Maximum cap that can be set.
Unit: microWatt
RO
Maximum cap that can be set.
`power[1-*]_cap_min`
Minimum cap that can be set.
Unit: microWatt
RO
Minimum cap that can be set.
`power[1-*]_max`
Maximum power.
Unit: microWatt
RW
Maximum power.
`power[1-*]_crit`
Critical maximum power.
@ -923,37 +483,16 @@ Humidity
********
`humidity[1-*]_input`
Humidity
Unit: milli-percent (per cent mille, pcm)
RO
Humidity.
`humidity[1-*]_enable`
Enable or disable the sensors
When disabled the sensor read will return
-ENODATA.
- 1: Enable
- 0: Disable
RW
Enable or disable the sensors.
`humidity[1-*]_rated_min`
Minimum rated humidity.
Unit: milli-percent (per cent mille, pcm)
RO
Minimum rated humidity.
`humidity[1-*]_rated_max`
Maximum rated humidity.
Unit: milli-percent (per cent mille, pcm)
RO
Maximum rated humidity.
******
Alarms
@ -1004,30 +543,15 @@ supports it. When this boolean has value 1, the measurement for that
channel should not be trusted.
`fan[1-*]_fault` / `temp[1-*]_fault`
Input fault condition
- 0: no fault occurred
- 1: fault condition
RO
Input fault condition.
Some chips also offer the possibility to get beeped when an alarm occurs:
`beep_enable`
Master beep enable
- 0: no beeps
- 1: beeps
RW
Master beep enable.
`in[0-*]_beep`, `curr[1-*]_beep`, `fan[1-*]_beep`, `temp[1-*]_beep`,
Channel beep
- 0: disable
- 1: enable
RW
Channel beep.
In theory, a chip could provide per-limit beep masking, but no such chip
was seen so far.
@ -1039,29 +563,8 @@ for compatibility reasons:
`alarms`
Alarm bitmask.
RO
Integer representation of one to four bytes.
A '1' bit means an alarm.
Chips should be programmed for 'comparator' mode so that
the alarm will 'come back' after you read the register
if it is still valid.
Generally a direct representation of a chip's internal
alarm registers; there is no standard for the position
of individual bits. For this reason, the use of this
interface file for new drivers is discouraged. Use
`individual *_alarm` and `*_fault` files instead.
Bits are defined in kernel/include/sensors.h.
`beep_mask`
Bitmask for beep.
Same format as 'alarms' with the same bit locations,
use discouraged for the same reason. Use individual
`*_beep` files instead.
RW
*******************
@ -1069,25 +572,10 @@ Intrusion detection
*******************
`intrusion[0-*]_alarm`
Chassis intrusion detection
- 0: OK
- 1: intrusion detected
RW
Contrary to regular alarm flags which clear themselves
automatically when read, this one sticks until cleared by
the user. This is done by writing 0 to the file. Writing
other values is unsupported.
Chassis intrusion detection.
`intrusion[0-*]_beep`
Chassis intrusion beep
0: disable
1: enable
RW
Chassis intrusion beep.
****************************
Average sample configuration

56
Documentation/x86/x86_64/machinecheck.rst
Просмотреть файл

@ -21,60 +21,8 @@ from /dev/mcelog. Normally mcelog should be run regularly from a cronjob.
Each CPU has a directory in /sys/devices/system/machinecheck/machinecheckN
(N = CPU number).
The directory contains some configurable entries:
bankNctl
(N bank number)
64bit Hex bitmask enabling/disabling specific subevents for bank N
When a bit in the bitmask is zero then the respective
subevent will not be reported.
By default all events are enabled.
Note that BIOS maintain another mask to disable specific events
per bank. This is not visible here
The following entries appear for each CPU, but they are truly shared
between all CPUs.
check_interval
How often to poll for corrected machine check errors, in seconds
(Note output is hexadecimal). Default 5 minutes. When the poller
finds MCEs it triggers an exponential speedup (poll more often) on
the polling interval. When the poller stops finding MCEs, it
triggers an exponential backoff (poll less often) on the polling
interval. The check_interval variable is both the initial and
maximum polling interval. 0 means no polling for corrected machine
check errors (but some corrected errors might be still reported
in other ways)
tolerant
Tolerance level. When a machine check exception occurs for a non
corrected machine check the kernel can take different actions.
Since machine check exceptions can happen any time it is sometimes
risky for the kernel to kill a process because it defies
normal kernel locking rules. The tolerance level configures
how hard the kernel tries to recover even at some risk of
deadlock. Higher tolerant values trade potentially better uptime
with the risk of a crash or even corruption (for tolerant >= 3).
0: always panic on uncorrected errors, log corrected errors
1: panic or SIGBUS on uncorrected errors, log corrected errors
2: SIGBUS or log uncorrected errors, log corrected errors
3: never panic or SIGBUS, log all errors (for testing only)
Default: 1
Note this only makes a difference if the CPU allows recovery
from a machine check exception. Current x86 CPUs generally do not.
trigger
Program to run when a machine check event is detected.
This is an alternative to running mcelog regularly from cron
and allows to detect events faster.
monarch_timeout
How long to wait for the other CPUs to machine check too on a
exception. 0 to disable waiting for other CPUs.
Unit: us
The directory contains some configurable entries. See
Documentation/ABI/testing/sysfs-mce for more details.
TBD document entries for AMD threshold interrupt configuration

3
MAINTAINERS
Просмотреть файл

@ -8317,6 +8317,7 @@ L: linux-hwmon@vger.kernel.org
S: Maintained
W: http://hwmon.wiki.kernel.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git
F: Documentation/ABI/testing/sysfs-class-hwmon
F: Documentation/devicetree/bindings/hwmon/
F: Documentation/hwmon/
F: drivers/hwmon/
@ -20557,6 +20558,8 @@ M: Tony Luck <tony.luck@intel.com>
M: Borislav Petkov <bp@alien8.de>
L: linux-edac@vger.kernel.org
S: Maintained
F: Documentation/ABI/testing/sysfs-mce
F: Documentation/x86/x86_64/machinecheck.rst
F: arch/x86/kernel/cpu/mce/*
X86 MICROCODE UPDATE SUPPORT

3
arch/x86/include/asm/microcode.h
Просмотреть файл

@ -130,14 +130,11 @@ static inline unsigned int x86_cpuid_family(void)
extern void __init load_ucode_bsp(void);
extern void load_ucode_ap(void);
void reload_early_microcode(void);
extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
extern bool initrd_gone;
#else
static inline void __init load_ucode_bsp(void) { }
static inline void load_ucode_ap(void) { }
static inline void reload_early_microcode(void) { }
static inline bool
get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; }
#endif
#endif /* _ASM_X86_MICROCODE_H */

14
arch/x86/kernel/cpu/microcode/amd.c
Просмотреть файл

@ -456,17 +456,23 @@ apply_microcode_early_amd(u32 cpuid_1_eax, void *ucode, size_t size, bool save_p
static bool get_builtin_microcode(struct cpio_data *cp, unsigned int family)
{
#ifdef CONFIG_X86_64
char fw_name[36] = "amd-ucode/microcode_amd.bin";
struct firmware fw;
if (IS_ENABLED(CONFIG_X86_32))
return false;
if (family >= 0x15)
snprintf(fw_name, sizeof(fw_name),
"amd-ucode/microcode_amd_fam%.2xh.bin", family);
return get_builtin_firmware(cp, fw_name);
#else
if (firmware_request_builtin(&fw, fw_name)) {
cp->size = fw.size;
cp->data = (void *)fw.data;
return true;
}
return false;
#endif
}
static void __load_ucode_amd(unsigned int cpuid_1_eax, struct cpio_data *ret)

17
arch/x86/kernel/cpu/microcode/core.c
Просмотреть файл

@ -140,23 +140,6 @@ static bool __init check_loader_disabled_bsp(void)
return *res;
}
extern struct builtin_fw __start_builtin_fw[];
extern struct builtin_fw __end_builtin_fw[];
bool get_builtin_firmware(struct cpio_data *cd, const char *name)
{
struct builtin_fw *b_fw;
for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
if (!strcmp(name, b_fw->name)) {
cd->size = b_fw->size;
cd->data = b_fw->data;
return true;
}
}
return false;
}
void __init load_ucode_bsp(void)
{
unsigned int cpuid_1_eax;

9
arch/x86/kernel/cpu/microcode/intel.c
Просмотреть файл

@ -456,6 +456,7 @@ static void save_mc_for_early(struct ucode_cpu_info *uci, u8 *mc, unsigned int s
static bool load_builtin_intel_microcode(struct cpio_data *cp)
{
unsigned int eax = 1, ebx, ecx = 0, edx;
struct firmware fw;
char name[30];
if (IS_ENABLED(CONFIG_X86_32))
@ -466,7 +467,13 @@ static bool load_builtin_intel_microcode(struct cpio_data *cp)
sprintf(name, "intel-ucode/%02x-%02x-%02x",
x86_family(eax), x86_model(eax), x86_stepping(eax));
return get_builtin_firmware(cp, name);
if (firmware_request_builtin(&fw, name)) {
cp->size = fw.size;
cp->data = (void *)fw.data;
return true;
}
return false;
}
/*

2
arch/x86/tools/relocs.c
Просмотреть файл

@ -68,7 +68,9 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
"(__parainstructions|__alt_instructions)(_end)?|"
"(__iommu_table|__apicdrivers|__smp_locks)(_end)?|"
"__(start|end)_pci_.*|"
#if CONFIG_FW_LOADER_BUILTIN
"__(start|end)_builtin_fw|"
#endif
"__(start|stop)___ksymtab(_gpl)?|"
"__(start|stop)___kcrctab(_gpl)?|"
"__(start|stop)___param|"

3
drivers/base/arch_topology.c
Просмотреть файл

@ -12,15 +12,12 @@
#include <linux/device.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sched/topology.h>
#include <linux/cpuset.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/rcupdate.h>
#include <linux/sched.h>
#include <linux/smp.h>
static DEFINE_PER_CPU(struct scale_freq_data __rcu *, sft_data);
static struct cpumask scale_freq_counters_mask;

6
drivers/base/component.c
Просмотреть файл

@ -9,7 +9,6 @@
*/
#include <linux/component.h>
#include <linux/device.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
@ -246,7 +245,7 @@ static int try_to_bring_up_master(struct master *master,
return 0;
}
if (!devres_open_group(master->parent, NULL, GFP_KERNEL))
if (!devres_open_group(master->parent, master, GFP_KERNEL))
return -ENOMEM;
/* Found all components */
@ -258,6 +257,7 @@ static int try_to_bring_up_master(struct master *master,
return ret;
}
devres_close_group(master->parent, NULL);
master->bound = true;
return 1;
}
@ -282,7 +282,7 @@ static void take_down_master(struct master *master)
{
if (master->bound) {
master->ops->unbind(master->parent);
devres_release_group(master->parent, NULL);
devres_release_group(master->parent, master);
master->bound = false;
}
}

17
drivers/base/core.c
Просмотреть файл

@ -821,9 +821,7 @@ struct device_link *device_link_add(struct device *consumer,
dev_bus_name(supplier), dev_name(supplier),
dev_bus_name(consumer), dev_name(consumer));
if (device_register(&link->link_dev)) {
put_device(consumer);
put_device(supplier);
kfree(link);
put_device(&link->link_dev);
link = NULL;
goto out;
}
@ -2875,7 +2873,7 @@ void device_initialize(struct device *dev)
spin_lock_init(&dev->devres_lock);
INIT_LIST_HEAD(&dev->devres_head);
device_pm_init(dev);
set_dev_node(dev, -1);
set_dev_node(dev, NUMA_NO_NODE);
#ifdef CONFIG_GENERIC_MSI_IRQ
raw_spin_lock_init(&dev->msi_lock);
INIT_LIST_HEAD(&dev->msi_list);
@ -4690,6 +4688,11 @@ define_dev_printk_level(_dev_info, KERN_INFO);
*
* return dev_err_probe(dev, err, ...);
*
* Note that it is deemed acceptable to use this function for error
* prints during probe even if the @err is known to never be -EPROBE_DEFER.
* The benefit compared to a normal dev_err() is the standardized format
* of the error code and the fact that the error code is returned.
*
* Returns @err.
*
*/
@ -4835,6 +4838,12 @@ int device_match_acpi_dev(struct device *dev, const void *adev)
}
EXPORT_SYMBOL(device_match_acpi_dev);
int device_match_acpi_handle(struct device *dev, const void *handle)
{
return ACPI_HANDLE(dev) == handle;
}
EXPORT_SYMBOL(device_match_acpi_handle);
int device_match_any(struct device *dev, const void *unused)
{
return 1;

6
drivers/base/firmware_loader/builtin/Makefile
Просмотреть файл

@ -1,11 +1,13 @@
# SPDX-License-Identifier: GPL-2.0
obj-y += main.o
# Create $(fwdir) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
# leading /, it's relative to $(srctree).
fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
obj-y := $(addsuffix .gen.o, $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE)))
firmware := $(addsuffix .gen.o, $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE)))
obj-y += $(firmware)
FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
FWSTR = $(subst $(comma),_,$(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME)))))
@ -34,7 +36,7 @@ $(obj)/%.gen.S: FORCE
$(call filechk,fwbin)
# The .o files depend on the binaries directly; the .S files don't.
$(addprefix $(obj)/, $(obj-y)): $(obj)/%.gen.o: $(fwdir)/%
$(addprefix $(obj)/, $(firmware)): $(obj)/%.gen.o: $(fwdir)/%
targets := $(patsubst $(obj)/%,%, \
$(shell find $(obj) -name \*.gen.S 2>/dev/null))

106
drivers/base/firmware_loader/builtin/main.c Normal file
Просмотреть файл

@ -0,0 +1,106 @@
// SPDX-License-Identifier: GPL-2.0
/* Builtin firmware support */
#include <linux/firmware.h>
#include "../firmware.h"
/* Only if FW_LOADER=y */
#ifdef CONFIG_FW_LOADER
struct builtin_fw {
char *name;
void *data;
unsigned long size;
};
extern struct builtin_fw __start_builtin_fw[];
extern struct builtin_fw __end_builtin_fw[];
static bool fw_copy_to_prealloc_buf(struct firmware *fw,
void *buf, size_t size)
{
if (!buf)
return true;
if (size < fw->size)
return false;
memcpy(buf, fw->data, fw->size);
return true;
}
/**
* firmware_request_builtin() - load builtin firmware
* @fw: pointer to firmware struct
* @name: name of firmware file
*
* Some use cases in the kernel have a requirement so that no memory allocator
* is involved as these calls take place early in boot process. An example is
* the x86 CPU microcode loader. In these cases all the caller wants is to see
* if the firmware was built-in and if so use it right away. This can be used
* for such cases.
*
* This looks for the firmware in the built-in kernel. Only if the kernel was
* built-in with the firmware you are looking for will this return successfully.
*
* Callers of this API do not need to use release_firmware() as the pointer to
* the firmware is expected to be provided locally on the stack of the caller.
**/
bool firmware_request_builtin(struct firmware *fw, const char *name)
{
struct builtin_fw *b_fw;
if (!fw)
return false;
for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
if (strcmp(name, b_fw->name) == 0) {
fw->size = b_fw->size;
fw->data = b_fw->data;
return true;
}
}
return false;
}
EXPORT_SYMBOL_NS_GPL(firmware_request_builtin, TEST_FIRMWARE);
/**
* firmware_request_builtin_buf() - load builtin firmware into optional buffer
* @fw: pointer to firmware struct
* @name: name of firmware file
* @buf: If set this lets you use a pre-allocated buffer so that the built-in
* firmware into is copied into. This field can be NULL. It is used by
* callers such as request_firmware_into_buf() and
* request_partial_firmware_into_buf()
* @size: if buf was provided, the max size of the allocated buffer available.
* If the built-in firmware does not fit into the pre-allocated @buf this
* call will fail.
*
* This looks for the firmware in the built-in kernel. Only if the kernel was
* built-in with the firmware you are looking for will this call possibly
* succeed. If you passed a @buf the firmware will be copied into it *iff* the
* built-in firmware fits into the pre-allocated buffer size specified in
* @size.
*
* This caller is to be used internally by the firmware_loader only.
**/
bool firmware_request_builtin_buf(struct firmware *fw, const char *name,
void *buf, size_t size)
{
if (!firmware_request_builtin(fw, name))
return false;
return fw_copy_to_prealloc_buf(fw, buf, size);
}
bool firmware_is_builtin(const struct firmware *fw)
{
struct builtin_fw *b_fw;
for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++)
if (fw->data == b_fw->data)
return true;
return false;
}
#endif

17
drivers/base/firmware_loader/firmware.h
Просмотреть файл

@ -151,6 +151,23 @@ static inline void fw_state_done(struct fw_priv *fw_priv)
int assign_fw(struct firmware *fw, struct device *device);
#ifdef CONFIG_FW_LOADER
bool firmware_is_builtin(const struct firmware *fw);
bool firmware_request_builtin_buf(struct firmware *fw, const char *name,
void *buf, size_t size);
#else /* module case */
static inline bool firmware_is_builtin(const struct firmware *fw)
{
return false;
}
static inline bool firmware_request_builtin_buf(struct firmware *fw,
const char *name,
void *buf, size_t size)
{
return false;
}
#endif
#ifdef CONFIG_FW_LOADER_PAGED_BUF
void fw_free_paged_buf(struct fw_priv *fw_priv);
int fw_grow_paged_buf(struct fw_priv *fw_priv, int pages_needed);

65
drivers/base/firmware_loader/main.c
Просмотреть файл

@ -93,65 +93,6 @@ DEFINE_MUTEX(fw_lock);
static struct firmware_cache fw_cache;
/* Builtin firmware support */
#ifdef CONFIG_FW_LOADER
extern struct builtin_fw __start_builtin_fw[];
extern struct builtin_fw __end_builtin_fw[];
static void fw_copy_to_prealloc_buf(struct firmware *fw,
void *buf, size_t size)
{
if (!buf || size < fw->size)
return;
memcpy(buf, fw->data, fw->size);
}
static bool fw_get_builtin_firmware(struct firmware *fw, const char *name,
void *buf, size_t size)
{
struct builtin_fw *b_fw;
for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
if (strcmp(name, b_fw->name) == 0) {
fw->size = b_fw->size;
fw->data = b_fw->data;
fw_copy_to_prealloc_buf(fw, buf, size);
return true;
}
}
return false;
}
static bool fw_is_builtin_firmware(const struct firmware *fw)
{
struct builtin_fw *b_fw;
for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++)
if (fw->data == b_fw->data)
return true;
return false;
}
#else /* Module case - no builtin firmware support */
static inline bool fw_get_builtin_firmware(struct firmware *fw,
const char *name, void *buf,
size_t size)
{
return false;
}
static inline bool fw_is_builtin_firmware(const struct firmware *fw)
{
return false;
}
#endif
static void fw_state_init(struct fw_priv *fw_priv)
{
struct fw_state *fw_st = &fw_priv->fw_st;
@ -736,7 +677,7 @@ _request_firmware_prepare(struct firmware **firmware_p, const char *name,
return -ENOMEM;
}
if (fw_get_builtin_firmware(firmware, name, dbuf, size)) {
if (firmware_request_builtin_buf(firmware, name, dbuf, size)) {
dev_dbg(device, "using built-in %s\n", name);
return 0; /* assigned */
}
@ -1051,7 +992,7 @@ EXPORT_SYMBOL(request_partial_firmware_into_buf);
void release_firmware(const struct firmware *fw)
{
if (fw) {
if (!fw_is_builtin_firmware(fw))
if (!firmware_is_builtin(fw))
firmware_free_data(fw);
kfree(fw);
}
@ -1215,7 +1156,7 @@ static int uncache_firmware(const char *fw_name)
pr_debug("%s: %s\n", __func__, fw_name);
if (fw_get_builtin_firmware(&fw, fw_name, NULL, 0))
if (firmware_request_builtin(&fw, fw_name))
return 0;
fw_priv = lookup_fw_priv(fw_name);

3
drivers/base/platform.c
Просмотреть файл

@ -1466,8 +1466,7 @@ int platform_dma_configure(struct device *dev)
}
static const struct dev_pm_ops platform_dev_pm_ops = {
.runtime_suspend = pm_generic_runtime_suspend,
.runtime_resume = pm_generic_runtime_resume,
SET_RUNTIME_PM_OPS(pm_generic_runtime_suspend, pm_generic_runtime_resume, NULL)
USE_PLATFORM_PM_SLEEP_OPS
};

6
drivers/base/swnode.c
Просмотреть файл

@ -413,9 +413,6 @@ software_node_get_name(const struct fwnode_handle *fwnode)
{
const struct swnode *swnode = to_swnode(fwnode);
if (!swnode)
return "(null)";
return kobject_name(&swnode->kobj);
}
@ -507,9 +504,6 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,
int error;
int i;
if (!swnode)
return -ENOENT;
prop = property_entry_get(swnode->node->properties, propname);
if (!prop)
return -ENOENT;

5
drivers/gpio/gpiolib-acpi.c
Просмотреть файл

@ -95,10 +95,7 @@ static bool acpi_gpio_deferred_req_irqs_done;
static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
{
if (!gc->parent)
return false;
return ACPI_HANDLE(gc->parent) == data;
return gc->parent && device_match_acpi_handle(gc->parent, data);
}
/**

22
drivers/i2c/i2c-core-acpi.c
Просмотреть файл

@ -398,24 +398,20 @@ u32 i2c_acpi_find_bus_speed(struct device *dev)
}
EXPORT_SYMBOL_GPL(i2c_acpi_find_bus_speed);
static int i2c_acpi_find_match_adapter(struct device *dev, const void *data)
{
struct i2c_adapter *adapter = i2c_verify_adapter(dev);
if (!adapter)
return 0;
return ACPI_HANDLE(dev) == (acpi_handle)data;
}
struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
{
struct i2c_adapter *adapter;
struct device *dev;
dev = bus_find_device(&i2c_bus_type, NULL, handle,
i2c_acpi_find_match_adapter);
dev = bus_find_device(&i2c_bus_type, NULL, handle, device_match_acpi_handle);
if (!dev)
return NULL;
return dev ? i2c_verify_adapter(dev) : NULL;
adapter = i2c_verify_adapter(dev);
if (!adapter)
put_device(dev);
return adapter;
}
EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_by_handle);

6
drivers/pci/pci-sysfs.c
Просмотреть файл

@ -81,8 +81,10 @@ static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list,
const struct cpumask *mask;
#ifdef CONFIG_NUMA
mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
cpumask_of_node(dev_to_node(dev));
if (dev_to_node(dev) == NUMA_NO_NODE)
mask = cpu_online_mask;
else
mask = cpumask_of_node(dev_to_node(dev));
#else
mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
#endif

3
fs/kernfs/symlink.c
Просмотреть файл

@ -36,8 +36,7 @@ struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
gid = target->iattr->ia_gid;
}
kn = kernfs_new_node(parent, name, S_IFLNK|S_IRWXUGO, uid, gid,
KERNFS_LINK);
kn = kernfs_new_node(parent, name, S_IFLNK|0777, uid, gid, KERNFS_LINK);
if (!kn)
return ERR_PTR(-ENOMEM);

3
fs/sysfs/dir.c
Просмотреть файл

@ -56,8 +56,7 @@ int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
kobject_get_ownership(kobj, &uid, &gid);
kn = kernfs_create_dir_ns(parent, kobject_name(kobj),
S_IRWXU | S_IRUGO | S_IXUGO, uid, gid,
kn = kernfs_create_dir_ns(parent, kobject_name(kobj), 0755, uid, gid,
kobj, ns);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)

136
fs/sysfs/file.c
Просмотреть файл

@ -45,6 +45,9 @@ static int sysfs_kf_seq_show(struct seq_file *sf, void *v)
ssize_t count;
char *buf;
if (WARN_ON_ONCE(!ops->show))
return -EINVAL;
/* acquire buffer and ensure that it's >= PAGE_SIZE and clear */
count = seq_get_buf(sf, &buf);
if (count < PAGE_SIZE) {
@ -53,15 +56,9 @@ static int sysfs_kf_seq_show(struct seq_file *sf, void *v)
}
memset(buf, 0, PAGE_SIZE);
/*
* Invoke show(). Control may reach here via seq file lseek even
* if @ops->show() isn't implemented.
*/
if (ops->show) {
count = ops->show(kobj, of->kn->priv, buf);
if (count < 0)
return count;
}
count = ops->show(kobj, of->kn->priv, buf);
if (count < 0)
return count;
/*
* The code works fine with PAGE_SIZE return but it's likely to
@ -255,67 +252,82 @@ static const struct kernfs_ops sysfs_bin_kfops_mmap = {
};
int sysfs_add_file_mode_ns(struct kernfs_node *parent,
const struct attribute *attr, bool is_bin,
umode_t mode, kuid_t uid, kgid_t gid, const void *ns)
const struct attribute *attr, umode_t mode, kuid_t uid,
kgid_t gid, const void *ns)
{
struct kobject *kobj = parent->priv;
const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops;
struct lock_class_key *key = NULL;
const struct kernfs_ops *ops;
const struct kernfs_ops *ops = NULL;
struct kernfs_node *kn;
loff_t size;
if (!is_bin) {
struct kobject *kobj = parent->priv;
const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops;
/* every kobject with an attribute needs a ktype assigned */
if (WARN(!sysfs_ops, KERN_ERR
"missing sysfs attribute operations for kobject: %s\n",
kobject_name(kobj)))
return -EINVAL;
/* every kobject with an attribute needs a ktype assigned */
if (WARN(!sysfs_ops, KERN_ERR
"missing sysfs attribute operations for kobject: %s\n",
kobject_name(kobj)))
return -EINVAL;
if (sysfs_ops->show && sysfs_ops->store) {
if (mode & SYSFS_PREALLOC)
ops = &sysfs_prealloc_kfops_rw;
else
ops = &sysfs_file_kfops_rw;
} else if (sysfs_ops->show) {
if (mode & SYSFS_PREALLOC)
ops = &sysfs_prealloc_kfops_ro;
else
ops = &sysfs_file_kfops_ro;
} else if (sysfs_ops->store) {
if (mode & SYSFS_PREALLOC)
ops = &sysfs_prealloc_kfops_wo;
else
ops = &sysfs_file_kfops_wo;
} else
ops = &sysfs_file_kfops_empty;
size = PAGE_SIZE;
if (mode & SYSFS_PREALLOC) {
if (sysfs_ops->show && sysfs_ops->store)
ops = &sysfs_prealloc_kfops_rw;
else if (sysfs_ops->show)
ops = &sysfs_prealloc_kfops_ro;
else if (sysfs_ops->store)
ops = &sysfs_prealloc_kfops_wo;
} else {
struct bin_attribute *battr = (void *)attr;
if (battr->mmap)
ops = &sysfs_bin_kfops_mmap;
else if (battr->read && battr->write)
ops = &sysfs_bin_kfops_rw;
else if (battr->read)
ops = &sysfs_bin_kfops_ro;
else if (battr->write)
ops = &sysfs_bin_kfops_wo;
else
ops = &sysfs_file_kfops_empty;
size = battr->size;
if (sysfs_ops->show && sysfs_ops->store)
ops = &sysfs_file_kfops_rw;
else if (sysfs_ops->show)
ops = &sysfs_file_kfops_ro;
else if (sysfs_ops->store)
ops = &sysfs_file_kfops_wo;
}
if (!ops)
ops = &sysfs_file_kfops_empty;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (!attr->ignore_lockdep)
key = attr->key ?: (struct lock_class_key *)&attr->skey;
#endif
kn = __kernfs_create_file(parent, attr->name, mode & 0777, uid, gid,
size, ops, (void *)attr, ns, key);
PAGE_SIZE, ops, (void *)attr, ns, key);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, attr->name);
return PTR_ERR(kn);
}
return 0;
}
int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
const struct bin_attribute *battr, umode_t mode,
kuid_t uid, kgid_t gid, const void *ns)
{
const struct attribute *attr = &battr->attr;
struct lock_class_key *key = NULL;
const struct kernfs_ops *ops;
struct kernfs_node *kn;
if (battr->mmap)
ops = &sysfs_bin_kfops_mmap;
else if (battr->read && battr->write)
ops = &sysfs_bin_kfops_rw;
else if (battr->read)
ops = &sysfs_bin_kfops_ro;
else if (battr->write)
ops = &sysfs_bin_kfops_wo;
else
ops = &sysfs_file_kfops_empty;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (!attr->ignore_lockdep)
key = attr->key ?: (struct lock_class_key *)&attr->skey;
#endif
kn = __kernfs_create_file(parent, attr->name, mode & 0777, uid, gid,
battr->size, ops, (void *)attr, ns, key);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, attr->name);
@ -340,9 +352,7 @@ int sysfs_create_file_ns(struct kobject *kobj, const struct attribute *attr,
return -EINVAL;
kobject_get_ownership(kobj, &uid, &gid);
return sysfs_add_file_mode_ns(kobj->sd, attr, false, attr->mode,
uid, gid, ns);
return sysfs_add_file_mode_ns(kobj->sd, attr, attr->mode, uid, gid, ns);
}
EXPORT_SYMBOL_GPL(sysfs_create_file_ns);
@ -385,8 +395,8 @@ int sysfs_add_file_to_group(struct kobject *kobj,
return -ENOENT;
kobject_get_ownership(kobj, &uid, &gid);
error = sysfs_add_file_mode_ns(parent, attr, false,
attr->mode, uid, gid, NULL);
error = sysfs_add_file_mode_ns(parent, attr, attr->mode, uid, gid,
NULL);
kernfs_put(parent);
return error;
@ -555,8 +565,8 @@ int sysfs_create_bin_file(struct kobject *kobj,
return -EINVAL;
kobject_get_ownership(kobj, &uid, &gid);
return sysfs_add_file_mode_ns(kobj->sd, &attr->attr, true,
attr->attr.mode, uid, gid, NULL);
return sysfs_add_bin_file_mode_ns(kobj->sd, attr, attr->attr.mode, uid,
gid, NULL);
}
EXPORT_SYMBOL_GPL(sysfs_create_bin_file);

15
fs/sysfs/group.c
Просмотреть файл

@ -61,8 +61,8 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj,
(*attr)->name, mode);
mode &= SYSFS_PREALLOC | 0664;
error = sysfs_add_file_mode_ns(parent, *attr, false,
mode, uid, gid, NULL);
error = sysfs_add_file_mode_ns(parent, *attr, mode, uid,
gid, NULL);
if (unlikely(error))
break;
}
@ -90,10 +90,9 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj,
(*bin_attr)->attr.name, mode);
mode &= SYSFS_PREALLOC | 0664;
error = sysfs_add_file_mode_ns(parent,
&(*bin_attr)->attr, true,
mode,
uid, gid, NULL);
error = sysfs_add_bin_file_mode_ns(parent, *bin_attr,
mode, uid, gid,
NULL);
if (error)
break;
}
@ -340,8 +339,8 @@ int sysfs_merge_group(struct kobject *kobj,
kobject_get_ownership(kobj, &uid, &gid);
for ((i = 0, attr = grp->attrs); *attr && !error; (++i, ++attr))
error = sysfs_add_file_mode_ns(parent, *attr, false,
(*attr)->mode, uid, gid, NULL);
error = sysfs_add_file_mode_ns(parent, *attr, (*attr)->mode,
uid, gid, NULL);
if (error) {
while (--i >= 0)
kernfs_remove_by_name(parent, (*--attr)->name);

8
fs/sysfs/sysfs.h
Просмотреть файл

@ -28,9 +28,11 @@ void sysfs_warn_dup(struct kernfs_node *parent, const char *name);
* file.c
*/
int sysfs_add_file_mode_ns(struct kernfs_node *parent,
const struct attribute *attr, bool is_bin,
umode_t amode, kuid_t uid, kgid_t gid,
const void *ns);
const struct attribute *attr, umode_t amode, kuid_t uid,
kgid_t gid, const void *ns);
int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
const struct bin_attribute *battr, umode_t mode,
kuid_t uid, kgid_t gid, const void *ns);
/*
* symlink.c

20
include/asm-generic/vmlinux.lds.h
Просмотреть файл

@ -476,13 +476,7 @@
__end_pci_fixups_suspend_late = .; \
} \
\
/* Built-in firmware blobs */ \
.builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \
__start_builtin_fw = .; \
KEEP(*(.builtin_fw)) \
__end_builtin_fw = .; \
} \
\
FW_LOADER_BUILT_IN_DATA \
TRACEDATA \
\
PRINTK_INDEX \
@ -887,6 +881,18 @@
#define ORC_UNWIND_TABLE
#endif
/* Built-in firmware blobs */
#ifdef CONFIG_FW_LOADER
#define FW_LOADER_BUILT_IN_DATA \
.builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \
__start_builtin_fw = .; \
KEEP(*(.builtin_fw)) \
__end_builtin_fw = .; \
}
#else
#define FW_LOADER_BUILT_IN_DATA
#endif
#ifdef CONFIG_PM_TRACE
#define TRACEDATA \
. = ALIGN(4); \

1
include/linux/device/bus.h
Просмотреть файл

@ -143,6 +143,7 @@ int device_match_of_node(struct device *dev, const void *np);
int device_match_fwnode(struct device *dev, const void *fwnode);
int device_match_devt(struct device *dev, const void *pdevt);
int device_match_acpi_dev(struct device *dev, const void *adev);
int device_match_acpi_handle(struct device *dev, const void *handle);
int device_match_any(struct device *dev, const void *unused);
/* iterator helpers for buses */

30
include/linux/firmware.h
Просмотреть файл

@ -20,23 +20,19 @@ struct firmware {
struct module;
struct device;
struct builtin_fw {
char *name;
void *data;
unsigned long size;
};
/* We have to play tricks here much like stringify() to get the
__COUNTER__ macro to be expanded as we want it */
#define __fw_concat1(x, y) x##y
#define __fw_concat(x, y) __fw_concat1(x, y)
#define DECLARE_BUILTIN_FIRMWARE(name, blob) \
DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \
static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
__used __section(".builtin_fw") = { name, blob, size }
/*
* Built-in firmware functionality is only available if FW_LOADER=y, but not
* FW_LOADER=m
*/
#ifdef CONFIG_FW_LOADER
bool firmware_request_builtin(struct firmware *fw, const char *name);
#else
static inline bool firmware_request_builtin(struct firmware *fw,
const char *name)
{
return false;
}
#endif
#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
int request_firmware(const struct firmware **fw, const char *name,

1
include/linux/fwnode.h
Просмотреть файл

@ -11,6 +11,7 @@
#include <linux/types.h>
#include <linux/list.h>
#include <linux/bits.h>
#include <linux/err.h>
struct fwnode_operations;

28
include/linux/kernfs.h
Просмотреть файл

@ -269,10 +269,6 @@ struct kernfs_ops {
struct poll_table_struct *pt);
int (*mmap)(struct kernfs_open_file *of, struct vm_area_struct *vma);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lock_class_key lockdep_key;
#endif
};
/*
@ -568,30 +564,6 @@ kernfs_create_dir(struct kernfs_node *parent, const char *name, umode_t mode,
priv, NULL);
}
static inline struct kernfs_node *
kernfs_create_file_ns(struct kernfs_node *parent, const char *name,
umode_t mode, kuid_t uid, kgid_t gid,
loff_t size, const struct kernfs_ops *ops,
void *priv, const void *ns)
{
struct lock_class_key *key = NULL;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
key = (struct lock_class_key *)&ops->lockdep_key;
#endif
return __kernfs_create_file(parent, name, mode, uid, gid,
size, ops, priv, ns, key);
}
static inline struct kernfs_node *
kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode,
loff_t size, const struct kernfs_ops *ops, void *priv)
{
return kernfs_create_file_ns(parent, name, mode,
GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
size, ops, priv, NULL);
}
static inline int kernfs_remove_by_name(struct kernfs_node *parent,
const char *name)
{

1
include/linux/kobject.h
Просмотреть файл

@ -101,7 +101,6 @@ int kobject_init_and_add(struct kobject *kobj,
extern void kobject_del(struct kobject *kobj);
extern struct kobject * __must_check kobject_create(void);
extern struct kobject * __must_check kobject_create_and_add(const char *name,
struct kobject *parent);

60
lib/dynamic_debug.c
Просмотреть файл

@ -71,6 +71,8 @@ static DEFINE_MUTEX(ddebug_lock);
static LIST_HEAD(ddebug_tables);
static int verbose;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, " dynamic_debug/control processing "
"( 0 = off (default), 1 = module add/rm, 2 = >control summary, 3 = parsing, 4 = per-site changes)");
/* Return the path relative to source root */
static inline const char *trim_prefix(const char *path)
@ -118,6 +120,8 @@ do { \
#define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__)
#define v2pr_info(fmt, ...) vnpr_info(2, fmt, ##__VA_ARGS__)
#define v3pr_info(fmt, ...) vnpr_info(3, fmt, ##__VA_ARGS__)
#define v4pr_info(fmt, ...) vnpr_info(4, fmt, ##__VA_ARGS__)
static void vpr_info_dq(const struct ddebug_query *query, const char *msg)
{
@ -130,7 +134,7 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg)
fmtlen--;
}
vpr_info("%s: func=\"%s\" file=\"%s\" module=\"%s\" format=\"%.*s\" lineno=%u-%u\n",
v3pr_info("%s: func=\"%s\" file=\"%s\" module=\"%s\" format=\"%.*s\" lineno=%u-%u\n",
msg,
query->function ?: "",
query->filename ?: "",
@ -213,7 +217,7 @@ static int ddebug_change(const struct ddebug_query *query,
static_branch_enable(&dp->key.dd_key_true);
#endif
dp->flags = newflags;
v2pr_info("changed %s:%d [%s]%s =%s\n",
v4pr_info("changed %s:%d [%s]%s =%s\n",
trim_prefix(dp->filename), dp->lineno,
dt->mod_name, dp->function,
ddebug_describe_flags(dp->flags, &fbuf));
@ -273,7 +277,7 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
buf = end;
}
if (verbose) {
if (verbose >= 3) {
int i;
pr_info("split into words:");
for (i = 0; i < nwords; i++)
@ -333,7 +337,7 @@ static int parse_linerange(struct ddebug_query *query, const char *first)
} else {
query->last_lineno = query->first_lineno;
}
vpr_info("parsed line %d-%d\n", query->first_lineno,
v3pr_info("parsed line %d-%d\n", query->first_lineno,
query->last_lineno);
return 0;
}
@ -447,7 +451,7 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers)
pr_err("bad flag-op %c, at start of %s\n", *str, str);
return -EINVAL;
}
vpr_info("op='%c'\n", op);
v3pr_info("op='%c'\n", op);
for (; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
@ -461,7 +465,7 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers)
return -EINVAL;
}
}
vpr_info("flags=0x%x\n", modifiers->flags);
v3pr_info("flags=0x%x\n", modifiers->flags);
/* calculate final flags, mask based upon op */
switch (op) {
@ -477,7 +481,7 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers)
modifiers->flags = 0;
break;
}
vpr_info("*flagsp=0x%x *maskp=0x%x\n", modifiers->flags, modifiers->mask);
v3pr_info("*flagsp=0x%x *maskp=0x%x\n", modifiers->flags, modifiers->mask);
return 0;
}
@ -529,7 +533,7 @@ static int ddebug_exec_queries(char *query, const char *modname)
if (!query || !*query || *query == '#')
continue;
vpr_info("query %d: \"%s\"\n", i, query);
vpr_info("query %d: \"%s\" mod:%s\n", i, query, modname ?: "*");
rc = ddebug_exec_query(query, modname);
if (rc < 0) {
@ -540,8 +544,9 @@ static int ddebug_exec_queries(char *query, const char *modname)
}
i++;
}
vpr_info("processed %d queries, with %d matches, %d errs\n",
i, nfound, errs);
if (i)
v2pr_info("processed %d queries, with %d matches, %d errs\n",
i, nfound, errs);
if (exitcode)
return exitcode;
@ -746,20 +751,17 @@ EXPORT_SYMBOL(__dynamic_ibdev_dbg);
#endif
#define DDEBUG_STRING_SIZE 1024
static __initdata char ddebug_setup_string[DDEBUG_STRING_SIZE];
static __init int ddebug_setup_query(char *str)
/*
* Install a noop handler to make dyndbg look like a normal kernel cli param.
* This avoids warnings about dyndbg being an unknown cli param when supplied
* by a user.
*/
static __init int dyndbg_setup(char *str)
{
if (strlen(str) >= DDEBUG_STRING_SIZE) {
pr_warn("ddebug boot param string too large\n");
return 0;
}
strlcpy(ddebug_setup_string, str, DDEBUG_STRING_SIZE);
return 1;
}
__setup("ddebug_query=", ddebug_setup_query);
__setup("dyndbg=", dyndbg_setup);
/*
* File_ops->write method for <debugfs>/dynamic_debug/control. Gathers the
@ -781,7 +783,7 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
tmpbuf = memdup_user_nul(ubuf, len);
if (IS_ERR(tmpbuf))
return PTR_ERR(tmpbuf);
vpr_info("read %d bytes from userspace\n", (int)len);
v2pr_info("read %zu bytes from userspace\n", len);
ret = ddebug_exec_queries(tmpbuf, NULL);
kfree(tmpbuf);
@ -969,7 +971,7 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
list_add(&dt->link, &ddebug_tables);
mutex_unlock(&ddebug_lock);
v2pr_info("%3u debug prints in module %s\n", n, dt->mod_name);
vpr_info("%3u debug prints in module %s\n", n, dt->mod_name);
return 0;
}
@ -1028,8 +1030,6 @@ int ddebug_remove_module(const char *mod_name)
struct ddebug_table *dt, *nextdt;
int ret = -ENOENT;
v2pr_info("removing module \"%s\"\n", mod_name);
mutex_lock(&ddebug_lock);
list_for_each_entry_safe(dt, nextdt, &ddebug_tables, link) {
if (dt->mod_name == mod_name) {
@ -1039,6 +1039,8 @@ int ddebug_remove_module(const char *mod_name)
}
}
mutex_unlock(&ddebug_lock);
if (!ret)
v2pr_info("removed module \"%s\"\n", mod_name);
return ret;
}
@ -1121,16 +1123,6 @@ static int __init dynamic_debug_init(void)
entries, modct, (int)((modct * sizeof(struct ddebug_table)) >> 10),
(int)((entries * sizeof(struct _ddebug)) >> 10));
/* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
pr_warn("ddebug_query param name is deprecated, change it to dyndbg\n");
ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
pr_warn("Invalid ddebug boot param %s\n",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
}
/* now that ddebug tables are loaded, process all boot args
* again to find and activate queries given in dyndbg params.
* While this has already been done for known boot params, it

2
lib/kobject.c
Просмотреть файл

@ -777,7 +777,7 @@ static struct kobj_type dynamic_kobj_ktype = {
* call to kobject_put() and not kfree(), as kobject_init() has
* already been called on this structure.
*/
struct kobject *kobject_create(void)
static struct kobject *kobject_create(void)
{
struct kobject *kobj;

493
scripts/get_abi.pl
Просмотреть файл

@ -1,19 +1,37 @@
#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0
BEGIN { $Pod::Usage::Formatter = 'Pod::Text::Termcap'; }
use strict;
use warnings;
use utf8;
use Pod::Usage;
use Pod::Usage qw(pod2usage);
use Getopt::Long;
use File::Find;
use IO::Handle;
use Fcntl ':mode';
use Cwd 'abs_path';
use Data::Dumper;
my $help = 0;
my $hint = 0;
my $man = 0;
my $debug = 0;
my $enable_lineno = 0;
my $show_warnings = 1;
my $prefix="Documentation/ABI";
my $sysfs_prefix="/sys";
my $search_string;
# Debug options
my $dbg_what_parsing = 1;
my $dbg_what_open = 2;
my $dbg_dump_abi_structs = 4;
my $dbg_undefined = 8;
$Data::Dumper::Indent = 1;
$Data::Dumper::Terse = 1;
#
# If true, assumes that the description is formatted with ReST
@ -21,25 +39,27 @@ my $prefix="Documentation/ABI";
my $description_is_rst = 1;
GetOptions(
"debug|d+" => \$debug,
"debug=i" => \$debug,
"enable-lineno" => \$enable_lineno,
"rst-source!" => \$description_is_rst,
"dir=s" => \$prefix,
'help|?' => \$help,
"show-hints" => \$hint,
"search-string=s" => \$search_string,
man => \$man
) or pod2usage(2);
pod2usage(1) if $help;
pod2usage(-exitstatus => 0, -verbose => 2) if $man;
pod2usage(-exitstatus => 0, -noperldoc, -verbose => 2) if $man;
pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2);
my ($cmd, $arg) = @ARGV;
pod2usage(2) if ($cmd ne "search" && $cmd ne "rest" && $cmd ne "validate");
pod2usage(2) if ($cmd ne "search" && $cmd ne "rest" && $cmd ne "validate" && $cmd ne "undefined");
pod2usage(2) if ($cmd eq "search" && !$arg);
require Data::Dumper if ($debug);
require Data::Dumper if ($debug & $dbg_dump_abi_structs);
my %data;
my %symbols;
@ -50,6 +70,8 @@ my %symbols;
sub parse_error($$$$) {
my ($file, $ln, $msg, $data) = @_;
return if (!$show_warnings);
$data =~ s/\s+$/\n/;
print STDERR "Warning: file $file#$ln:\n\t$msg";
@ -97,7 +119,7 @@ sub parse_abi {
my @labels;
my $label = "";
print STDERR "Opening $file\n" if ($debug > 1);
print STDERR "Opening $file\n" if ($debug & $dbg_what_open);
open IN, $file;
while(<IN>) {
$ln++;
@ -129,12 +151,12 @@ sub parse_abi {
push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);
if ($tag =~ m/what/) {
$what .= ", " . $content;
$what .= "\xac" . $content;
} else {
if ($what) {
parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
foreach my $w(split /, /, $what) {
foreach my $w(split /\xac/, $what) {
$symbols{$w}->{xref} = $what;
};
}
@ -164,12 +186,13 @@ sub parse_abi {
$data{$what}->{file} = $name;
$data{$what}->{filepath} = $file;
} else {
$data{$what}->{description} .= "\n\n" if (defined($data{$what}->{description}));
if ($name ne $data{$what}->{file}) {
$data{$what}->{file} .= " " . $name;
$data{$what}->{filepath} .= " " . $file;
}
}
print STDERR "\twhat: $what\n" if ($debug > 1);
print STDERR "\twhat: $what\n" if ($debug & $dbg_what_parsing);
$data{$what}->{line_no} = $ln;
} else {
$data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no}));
@ -239,7 +262,7 @@ sub parse_abi {
if ($what) {
parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
foreach my $w(split /, /,$what) {
foreach my $w(split /\xac/,$what) {
$symbols{$w}->{xref} = $what;
};
}
@ -328,7 +351,7 @@ sub output_rest {
printf ".. _%s:\n\n", $data{$what}->{label};
my @names = split /, /,$w;
my @names = split /\xac/,$w;
my $len = 0;
foreach my $name (@names) {
@ -492,6 +515,7 @@ sub search_symbols {
my $file = $data{$what}->{filepath};
$what =~ s/\xac/, /g;
my $bar = $what;
$bar =~ s/./-/g;
@ -521,22 +545,420 @@ sub search_symbols {
}
}
# Exclude /sys/kernel/debug and /sys/kernel/tracing from the search path
sub dont_parse_special_attributes {
if (($File::Find::dir =~ m,^/sys/kernel,)) {
return grep {!/(debug|tracing)/ } @_;
}
if (($File::Find::dir =~ m,^/sys/fs,)) {
return grep {!/(pstore|bpf|fuse)/ } @_;
}
return @_
}
my %leaf;
my %aliases;
my @files;
my %root;
sub graph_add_file {
my $file = shift;
my $type = shift;
my $dir = $file;
$dir =~ s,^(.*/).*,$1,;
$file =~ s,.*/,,;
my $name;
my $file_ref = \%root;
foreach my $edge(split "/", $dir) {
$name .= "$edge/";
if (!defined ${$file_ref}{$edge}) {
${$file_ref}{$edge} = { };
}
$file_ref = \%{$$file_ref{$edge}};
${$file_ref}{"__name"} = [ $name ];
}
$name .= "$file";
${$file_ref}{$file} = {
"__name" => [ $name ]
};
return \%{$$file_ref{$file}};
}
sub graph_add_link {
my $file = shift;
my $link = shift;
# Traverse graph to find the reference
my $file_ref = \%root;
foreach my $edge(split "/", $file) {
$file_ref = \%{$$file_ref{$edge}} || die "Missing node!";
}
# do a BFS
my @queue;
my %seen;
my $st;
push @queue, $file_ref;
$seen{$start}++;
while (@queue) {
my $v = shift @queue;
my @child = keys(%{$v});
foreach my $c(@child) {
next if $seen{$$v{$c}};
next if ($c eq "__name");
if (!defined($$v{$c}{"__name"})) {
printf STDERR "Error: Couldn't find a non-empty name on a children of $file/.*: ";
print STDERR Dumper(%{$v});
exit;
}
# Add new name
my $name = @{$$v{$c}{"__name"}}[0];
if ($name =~ s#^$file/#$link/#) {
push @{$$v{$c}{"__name"}}, $name;
}
# Add child to the queue and mark as seen
push @queue, $$v{$c};
$seen{$c}++;
}
}
}
my $escape_symbols = qr { ([\x01-\x08\x0e-\x1f\x21-\x29\x2b-\x2d\x3a-\x40\x7b-\xfe]) }x;
sub parse_existing_sysfs {
my $file = $File::Find::name;
my $mode = (lstat($file))[2];
my $abs_file = abs_path($file);
my @tmp;
push @tmp, $file;
push @tmp, $abs_file if ($abs_file ne $file);
foreach my $f(@tmp) {
# Ignore cgroup, as this is big and has zero docs under ABI
return if ($f =~ m#^/sys/fs/cgroup/#);
# Ignore firmware as it is documented elsewhere
# Either ACPI or under Documentation/devicetree/bindings/
return if ($f =~ m#^/sys/firmware/#);
# Ignore some sysfs nodes that aren't actually part of ABI
return if ($f =~ m#/sections|notes/#);
# Would need to check at
# Documentation/admin-guide/kernel-parameters.txt, but this
# is not easily parseable.
return if ($f =~ m#/parameters/#);
}
if (S_ISLNK($mode)) {
$aliases{$file} = $abs_file;
return;
}
return if (S_ISDIR($mode));
# Trivial: file is defined exactly the same way at ABI What:
return if (defined($data{$file}));
return if (defined($data{$abs_file}));
push @files, graph_add_file($abs_file, "file");
}
sub get_leave($)
{
my $what = shift;
my $leave;
my $l = $what;
my $stop = 1;
$leave = $l;
$leave =~ s,/$,,;
$leave =~ s,.*/,,;
$leave =~ s/[\(\)]//g;
# $leave is used to improve search performance at
# check_undefined_symbols, as the algorithm there can seek
# for a small number of "what". It also allows giving a
# hint about a leave with the same name somewhere else.
# However, there are a few occurences where the leave is
# either a wildcard or a number. Just group such cases
# altogether.
if ($leave =~ m/\.\*/ || $leave eq "" || $leave =~ /\\d/) {
$leave = "others";
}
return $leave;
}
my @not_found;
sub check_file($$)
{
my $file_ref = shift;
my $names_ref = shift;
my @names = @{$names_ref};
my $file = $names[0];
my $found_string;
my $leave = get_leave($file);
if (!defined($leaf{$leave})) {
$leave = "others";
}
my @expr = @{$leaf{$leave}->{expr}};
die ("\rmissing rules for $leave") if (!defined($leaf{$leave}));
my $path = $file;
$path =~ s,(.*/).*,$1,;
if ($search_string) {
return if (!($file =~ m#$search_string#));
$found_string = 1;
}
for (my $i = 0; $i < @names; $i++) {
if ($found_string && $hint) {
if (!$i) {
print STDERR "--> $names[$i]\n";
} else {
print STDERR " $names[$i]\n";
}
}
foreach my $re (@expr) {
print STDERR "$names[$i] =~ /^$re\$/\n" if ($debug && $dbg_undefined);
if ($names[$i] =~ $re) {
return;
}
}
}
if ($leave ne "others") {
my @expr = @{$leaf{"others"}->{expr}};
for (my $i = 0; $i < @names; $i++) {
foreach my $re (@expr) {
print STDERR "$names[$i] =~ /^$re\$/\n" if ($debug && $dbg_undefined);
if ($names[$i] =~ $re) {
return;
}
}
}
}
push @not_found, $file if (!$search_string || $found_string);
if ($hint && (!$search_string || $found_string)) {
my $what = $leaf{$leave}->{what};
$what =~ s/\xac/\n\t/g;
if ($leave ne "others") {
print STDERR "\r more likely regexes:\n\t$what\n";
} else {
print STDERR "\r tested regexes:\n\t$what\n";
}
}
}
sub check_undefined_symbols {
my $num_files = scalar @files;
my $next_i = 0;
my $start_time = times;
@files = sort @files;
my $last_time = $start_time;
# When either debug or hint is enabled, there's no sense showing
# progress, as the progress will be overriden.
if ($hint || ($debug && $dbg_undefined)) {
$next_i = $num_files;
}
my $is_console;
$is_console = 1 if (-t STDERR);
for (my $i = 0; $i < $num_files; $i++) {
my $file_ref = $files[$i];
my @names = @{$$file_ref{"__name"}};
check_file($file_ref, \@names);
my $cur_time = times;
if ($i == $next_i || $cur_time > $last_time + 1) {
my $percent = $i * 100 / $num_files;
my $tm = $cur_time - $start_time;
my $time = sprintf "%d:%02d", int($tm), 60 * ($tm - int($tm));
printf STDERR "\33[2K\r", if ($is_console);
printf STDERR "%s: processing sysfs files... %i%%: $names[0]", $time, $percent;
printf STDERR "\n", if (!$is_console);
STDERR->flush();
$next_i = int (($percent + 1) * $num_files / 100);
$last_time = $cur_time;
}
}
my $cur_time = times;
my $tm = $cur_time - $start_time;
my $time = sprintf "%d:%02d", int($tm), 60 * ($tm - int($tm));
printf STDERR "\33[2K\r", if ($is_console);
printf STDERR "%s: processing sysfs files... done\n", $time;
foreach my $file (@not_found) {
print "$file not found.\n";
}
}
sub undefined_symbols {
print STDERR "Reading $sysfs_prefix directory contents...";
find({
wanted =>\&parse_existing_sysfs,
preprocess =>\&dont_parse_special_attributes,
no_chdir => 1
}, $sysfs_prefix);
print STDERR "done.\n";
$leaf{"others"}->{what} = "";
print STDERR "Converting ABI What fields into regexes...";
foreach my $w (sort keys %data) {
foreach my $what (split /\xac/,$w) {
next if (!($what =~ m/^$sysfs_prefix/));
# Convert what into regular expressions
# Escape dot characters
$what =~ s/\./\xf6/g;
# Temporarily change [0-9]+ type of patterns
$what =~ s/\[0\-9\]\+/\xff/g;
# Temporarily change [\d+-\d+] type of patterns
$what =~ s/\[0\-\d+\]/\xff/g;
$what =~ s/\[(\d+)\]/\xf4$1\xf5/g;
# Temporarily change [0-9] type of patterns
$what =~ s/\[(\d)\-(\d)\]/\xf4$1-$2\xf5/g;
# Handle multiple option patterns
$what =~ s/[\{\<\[]([\w_]+)(?:[,|]+([\w_]+)){1,}[\}\>\]]/($1|$2)/g;
# Handle wildcards
$what =~ s,\*,.*,g;
$what =~ s,/\xf6..,/.*,g;
$what =~ s/\<[^\>]+\>/.*/g;
$what =~ s/\{[^\}]+\}/.*/g;
$what =~ s/\[[^\]]+\]/.*/g;
$what =~ s/[XYZ]/.*/g;
# Recover [0-9] type of patterns
$what =~ s/\xf4/[/g;
$what =~ s/\xf5/]/g;
# Remove duplicated spaces
$what =~ s/\s+/ /g;
# Special case: this ABI has a parenthesis on it
$what =~ s/sqrt\(x^2\+y^2\+z^2\)/sqrt\(x^2\+y^2\+z^2\)/;
# Special case: drop comparition as in:
# What: foo = <something>
# (this happens on a few IIO definitions)
$what =~ s,\s*\=.*$,,;
# Escape all other symbols
$what =~ s/$escape_symbols/\\$1/g;
$what =~ s/\\\\/\\/g;
$what =~ s/\\([\[\]\(\)\|])/$1/g;
$what =~ s/(\d+)\\(-\d+)/$1$2/g;
$what =~ s/\xff/\\d+/g;
# Special case: IIO ABI which a parenthesis.
$what =~ s/sqrt(.*)/sqrt\(.*\)/;
# Simplify regexes with multiple .*
$what =~ s#(?:\.\*){2,}##g;
# $what =~ s#\.\*/\.\*#.*#g;
# Recover dot characters
$what =~ s/\xf6/\./g;
my $leave = get_leave($what);
my $added = 0;
foreach my $l (split /\|/, $leave) {
if (defined($leaf{$l})) {
next if ($leaf{$l}->{what} =~ m/\b$what\b/);
$leaf{$l}->{what} .= "\xac" . $what;
$added = 1;
} else {
$leaf{$l}->{what} = $what;
$added = 1;
}
}
if ($search_string && $added) {
print STDERR "What: $what\n" if ($what =~ m#$search_string#);
}
}
}
# Compile regexes
foreach my $l (sort keys %leaf) {
my @expr;
foreach my $w(sort split /\xac/, $leaf{$l}->{what}) {
push @expr, qr /^$w$/;
}
$leaf{$l}->{expr} = \@expr;
}
# Take links into account
foreach my $link (sort keys %aliases) {
my $abs_file = $aliases{$link};
graph_add_link($abs_file, $link);
}
print STDERR "done.\n";
check_undefined_symbols;
}
# Ensure that the prefix will always end with a slash
# While this is not needed for find, it makes the patch nicer
# with --enable-lineno
$prefix =~ s,/?$,/,;
if ($cmd eq "undefined" || $cmd eq "search") {
$show_warnings = 0;
}
#
# Parses all ABI files located at $prefix dir
#
find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug & $dbg_dump_abi_structs);
#
# Handles the command
#
if ($cmd eq "search") {
if ($cmd eq "undefined") {
undefined_symbols;
} elsif ($cmd eq "search") {
search_symbols;
} else {
if ($cmd eq "rest") {
@ -562,18 +984,23 @@ abi_book.pl - parse the Linux ABI files and produce a ReST book.
=head1 SYNOPSIS
B<abi_book.pl> [--debug] [--enable-lineno] [--man] [--help]
[--(no-)rst-source] [--dir=<dir>] <COMAND> [<ARGUMENT>]
B<abi_book.pl> [--debug <level>] [--enable-lineno] [--man] [--help]
[--(no-)rst-source] [--dir=<dir>] [--show-hints]
[--search-string <regex>]
<COMAND> [<ARGUMENT>]
Where <COMMAND> can be:
Where B<COMMAND> can be:
=over 8
B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI
B<search> I<SEARCH_REGEX> - search for I<SEARCH_REGEX> inside ABI
B<rest> - output the ABI in ReST markup language
B<rest> - output the ABI in ReST markup language
B<validate> - validate the ABI contents
B<validate> - validate the ABI contents
B<undefined> - existing symbols at the system that aren't
defined at Documentation/ABI
=back
@ -589,18 +1016,32 @@ the Documentation/ABI directory.
=item B<--rst-source> and B<--no-rst-source>
The input file may be using ReST syntax or not. Those two options allow
selecting between a rst-compliant source ABI (--rst-source), or a
selecting between a rst-compliant source ABI (B<--rst-source>), or a
plain text that may be violating ReST spec, so it requres some escaping
logic (--no-rst-source).
logic (B<--no-rst-source>).
=item B<--enable-lineno>
Enable output of #define LINENO lines.
=item B<--debug>
=item B<--debug> I<debug level>
Put the script in verbose mode, useful for debugging. Can be called multiple
times, to increase verbosity.
Print debug information according with the level, which is given by the
following bitmask:
- 1: Debug parsing What entries from ABI files;
- 2: Shows what files are opened from ABI files;
- 4: Dump the structs used to store the contents of the ABI files.
=item B<--show-hints>
Show hints about possible definitions for the missing ABI symbols.
Used only when B<undefined>.
=item B<--search-string> I<regex string>
Show only occurences that match a search string.
Used only when B<undefined>.
=item B<--help>
@ -646,11 +1087,11 @@ $ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
=head1 BUGS
Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Report bugs to Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
=head1 COPYRIGHT
Copyright (c) 2016-2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.
Copyright (c) 2016-2021 by Mauro Carvalho Chehab <mchehab+huawei@kernel.org>.
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.