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228 Коммитов

Автор SHA1 Сообщение Дата
Eric Auger 065c003482 KVM: arm/arm64: vgic: add init entry to VGIC KVM device
Since the advent of VGIC dynamic initialization, this latter is
initialized quite late on the first vcpu run or "on-demand", when
injecting an IRQ or when the guest sets its registers.

This initialization could be initiated explicitly much earlier
by the users-space, as soon as it has provided the requested
dimensioning parameters.

This patch adds a new entry to the VGIC KVM device that allows
the user to manually request the VGIC init:
- a new KVM_DEV_ARM_VGIC_GRP_CTRL group is introduced.
- Its first attribute is KVM_DEV_ARM_VGIC_CTRL_INIT

The rationale behind introducing a group is to be able to add other
controls later on, if needed.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-01-11 14:12:15 +01:00
Paolo Bonzini 333bce5aac Second round of changes for KVM for arm/arm64 for v3.19; fixes reboot
problems, clarifies VCPU init, and fixes a regression concerning the
 VGIC init flow.
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Merge tag 'kvm-arm-for-3.19-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

Second round of changes for KVM for arm/arm64 for v3.19; fixes reboot
problems, clarifies VCPU init, and fixes a regression concerning the
VGIC init flow.

Conflicts:
	arch/ia64/kvm/kvm-ia64.c [deleted in HEAD and modified in kvmarm]
2014-12-15 13:06:40 +01:00
Christoffer Dall cf5d318865 arm/arm64: KVM: Turn off vcpus on PSCI shutdown/reboot
When a vcpu calls SYSTEM_OFF or SYSTEM_RESET with PSCI v0.2, the vcpus
should really be turned off for the VM adhering to the suggestions in
the PSCI spec, and it's the sane thing to do.

Also, clarify the behavior and expectations for exits to user space with
the KVM_EXIT_SYSTEM_EVENT case.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2014-12-13 14:15:27 +01:00
Christoffer Dall f7fa034dc8 arm/arm64: KVM: Clarify KVM_ARM_VCPU_INIT ABI
It is not clear that this ioctl can be called multiple times for a given
vcpu.  Userspace already does this, so clarify the ABI.

Also specify that userspace is expected to always make secondary and
subsequent calls to the ioctl with the same parameters for the VCPU as
the initial call (which userspace also already does).

Add code to check that userspace doesn't violate that ABI in the future,
and move the kvm_vcpu_set_target() function which is currently
duplicated between the 32-bit and 64-bit versions in guest.c to a common
static function in arm.c, shared between both architectures.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2014-12-13 14:15:26 +01:00
Christoffer Dall 3ad8b3de52 arm/arm64: KVM: Correct KVM_ARM_VCPU_INIT power off option
The implementation of KVM_ARM_VCPU_INIT is currently not doing what
userspace expects, namely making sure that a vcpu which may have been
turned off using PSCI is returned to its initial state, which would be
powered on if userspace does not set the KVM_ARM_VCPU_POWER_OFF flag.

Implement the expected functionality and clarify the ABI.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2014-12-13 14:15:25 +01:00
Tiejun Chen c32a42721c kvm: Documentation: remove ia64
kvm/ia64 is gone, clean up Documentation too.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-11-20 11:08:55 +01:00
Paolo Bonzini 173ede4ddd KVM: s390: Fixes for kvm/next (3.19) and stable
1. We should flush TLBs for load control instruction emulation (stable)
 2. A workaround for a compiler bug that renders ACCESS_ONCE broken (stable)
 3. Fix program check handling for load control
 4. Documentation Fix
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Merge tag 'kvm-s390-next-20141107' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: Fixes for kvm/next (3.19) and stable

1. We should flush TLBs for load control instruction emulation (stable)
2. A workaround for a compiler bug that renders ACCESS_ONCE broken (stable)
3. Fix program check handling for load control
4. Documentation Fix
2014-11-07 15:39:44 +01:00
Dominik Dingel 365dc16335 KVM: fix vm device attribute documentation
Documentation uses incorrect attribute names for some vm device
attributes: fix this.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-11-07 11:11:11 +01:00
Michael S. Tsirkin 7f05db6a20 kvm: drop unsupported capabilities, fix documentation
No kernel ever reported KVM_CAP_DEVICE_MSIX, KVM_CAP_DEVICE_MSI,
KVM_CAP_DEVICE_ASSIGNMENT, KVM_CAP_DEVICE_DEASSIGNMENT.

This makes the documentation wrong, and no application ever
written to use these capabilities has a chance to work correctly.
The only way to detect support is to try, and test errno for ENOTTY.
That's unfortunate, but we can't fix the past.

Document the actual semantics, and drop the definitions from
the exported header to make it easier for application
developers to note and fix the bug.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-11-03 12:07:29 +01:00
Tiejun Chen 91690bf32e Documentation: virtual: kvm: correct one bit description in APF case
When commit 6adba52742 (KVM: Let host know whether the guest can
handle async PF in non-userspace context.) is introduced, actually
bit 2 still is reserved and should be zero. Instead, bit 1 is 1 to
indicate if asynchronous page faults can be injected when vcpu is
in cpl == 0, and also please see this,

in the file kvm_para.h, #define KVM_ASYNC_PF_SEND_ALWAYS (1 << 1).

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-11-03 12:07:27 +01:00
Paolo Bonzini e77d99d4a4 Changes for KVM for arm/arm64 for 3.18
This includes a bunch of changes:
  - Support read-only memory slots on arm/arm64
  - Various changes to fix Sparse warnings
  - Correctly detect write vs. read Stage-2 faults
  - Various VGIC cleanups and fixes
  - Dynamic VGIC data strcuture sizing
  - Fix SGI set_clear_pend offset bug
  - Fix VTTBR_BADDR Mask
  - Correctly report the FSC on Stage-2 faults
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Merge tag 'kvm-arm-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-next

Changes for KVM for arm/arm64 for 3.18

This includes a bunch of changes:
 - Support read-only memory slots on arm/arm64
 - Various changes to fix Sparse warnings
 - Correctly detect write vs. read Stage-2 faults
 - Various VGIC cleanups and fixes
 - Dynamic VGIC data strcuture sizing
 - Fix SGI set_clear_pend offset bug
 - Fix VTTBR_BADDR Mask
 - Correctly report the FSC on Stage-2 faults

Conflicts:
	virt/kvm/eventfd.c
	[duplicate, different patch where the kvm-arm version broke x86.
	 The kvm tree instead has the right one]
2014-09-27 11:03:33 +02:00
Bharat Bhushan bc8a4e5c25 KVM: PPC: BOOKE: Add one_reg documentation of SPRG9 and DBSR
This was missed in respective one_reg implementation patch.

Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22 10:11:32 +02:00
Marc Zyngier a98f26f183 arm/arm64: KVM: vgic: make number of irqs a configurable attribute
In order to make the number of interrupts configurable, use the new
fancy device management API to add KVM_DEV_ARM_VGIC_GRP_NR_IRQS as
a VGIC configurable attribute.

Userspace can now specify the exact size of the GIC (by increments
of 32 interrupts).

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2014-09-18 18:48:58 -07:00
Alex Bennée 209cf19fcd KVM: fix api documentation of KVM_GET_EMULATED_CPUID
It looks like when this was initially merged it got accidentally included
in the following section. I've just moved it back in the correct section
and re-numbered it as other ioctls have been added since.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-10 11:34:39 +02:00
Alex Bennée 4bd9d3441e KVM: document KVM_SET_GUEST_DEBUG api
In preparation for working on the ARM implementation I noticed the debug
interface was missing from the API document. I've pieced together the
expected behaviour from the code and commit messages written it up as
best I can.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-10 11:33:12 +02:00
David Matlack ee3d1570b5 kvm: fix potentially corrupt mmio cache
vcpu exits and memslot mutations can run concurrently as long as the
vcpu does not aquire the slots mutex. Thus it is theoretically possible
for memslots to change underneath a vcpu that is handling an exit.

If we increment the memslot generation number again after
synchronize_srcu_expedited(), vcpus can safely cache memslot generation
without maintaining a single rcu_dereference through an entire vm exit.
And much of the x86/kvm code does not maintain a single rcu_dereference
of the current memslots during each exit.

We can prevent the following case:

   vcpu (CPU 0)                             | thread (CPU 1)
--------------------------------------------+--------------------------
1  vm exit                                  |
2  srcu_read_unlock(&kvm->srcu)             |
3  decide to cache something based on       |
     old memslots                           |
4                                           | change memslots
                                            | (increments generation)
5                                           | synchronize_srcu(&kvm->srcu);
6  retrieve generation # from new memslots  |
7  tag cache with new memslot generation    |
8  srcu_read_unlock(&kvm->srcu)             |
...                                         |
   <action based on cache occurs even       |
    though the caching decision was based   |
    on the old memslots>                    |
...                                         |
   <action *continues* to occur until next  |
    memslot generation change, which may    |
    be never>                               |
                                            |

By incrementing the generation after synchronizing with kvm->srcu readers,
we ensure that the generation retrieved in (6) will become invalid soon
after (8).

Keeping the existing increment is not strictly necessary, but we
do keep it and just move it for consistency from update_memslots to
install_new_memslots.  It invalidates old cached MMIOs immediately,
instead of having to wait for the end of synchronize_srcu_expedited,
which makes the code more clearly correct in case CPU 1 is preempted
right after synchronize_srcu() returns.

To avoid halving the generation space in SPTEs, always presume that the
low bit of the generation is zero when reconstructing a generation number
out of an SPTE.  This effectively disables MMIO caching in SPTEs during
the call to synchronize_srcu_expedited.  Using the low bit this way is
somewhat like a seqcount---where the protected thing is a cache, and
instead of retrying we can simply punt if we observe the low bit to be 1.

Cc: stable@vger.kernel.org
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-03 10:03:41 +02:00
David Hildenbrand d8482c0d87 KVM: clarify the idea of kvm_dirty_regs
This patch clarifies that kvm_dirty_regs are just a hint to the kernel and
that the kernel might just ignore some flags and sync the values (like done for
acrs and gprs now).

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-08-25 14:35:29 +02:00
Paolo Bonzini cc568ead3c Patch queue for ppc - 2014-08-01
Highlights in this release include:
 
   - BookE: Rework instruction fetch, not racy anymore now
   - BookE HV: Fix ONE_REG accessors for some in-hardware registers
   - Book3S: Good number of LE host fixes, enable HV on LE
   - Book3S: Some misc bug fixes
   - Book3S HV: Add in-guest debug support
   - Book3S HV: Preload cache lines on context switch
   - Remove 440 support
 
 Alexander Graf (31):
       KVM: PPC: Book3s PR: Disable AIL mode with OPAL
       KVM: PPC: Book3s HV: Fix tlbie compile error
       KVM: PPC: Book3S PR: Handle hyp doorbell exits
       KVM: PPC: Book3S PR: Fix ABIv2 on LE
       KVM: PPC: Book3S PR: Fix sparse endian checks
       PPC: Add asm helpers for BE 32bit load/store
       KVM: PPC: Book3S HV: Make HTAB code LE host aware
       KVM: PPC: Book3S HV: Access guest VPA in BE
       KVM: PPC: Book3S HV: Access host lppaca and shadow slb in BE
       KVM: PPC: Book3S HV: Access XICS in BE
       KVM: PPC: Book3S HV: Fix ABIv2 on LE
       KVM: PPC: Book3S HV: Enable for little endian hosts
       KVM: PPC: Book3S: Move vcore definition to end of kvm_arch struct
       KVM: PPC: Deflect page write faults properly in kvmppc_st
       KVM: PPC: Book3S: Stop PTE lookup on write errors
       KVM: PPC: Book3S: Add hack for split real mode
       KVM: PPC: Book3S: Make magic page properly 4k mappable
       KVM: PPC: Remove 440 support
       KVM: Rename and add argument to check_extension
       KVM: Allow KVM_CHECK_EXTENSION on the vm fd
       KVM: PPC: Book3S: Provide different CAPs based on HV or PR mode
       KVM: PPC: Implement kvmppc_xlate for all targets
       KVM: PPC: Move kvmppc_ld/st to common code
       KVM: PPC: Remove kvmppc_bad_hva()
       KVM: PPC: Use kvm_read_guest in kvmppc_ld
       KVM: PPC: Handle magic page in kvmppc_ld/st
       KVM: PPC: Separate loadstore emulation from priv emulation
       KVM: PPC: Expose helper functions for data/inst faults
       KVM: PPC: Remove DCR handling
       KVM: PPC: HV: Remove generic instruction emulation
       KVM: PPC: PR: Handle FSCR feature deselects
 
 Alexey Kardashevskiy (1):
       KVM: PPC: Book3S: Fix LPCR one_reg interface
 
 Aneesh Kumar K.V (4):
       KVM: PPC: BOOK3S: PR: Fix PURR and SPURR emulation
       KVM: PPC: BOOK3S: PR: Emulate virtual timebase register
       KVM: PPC: BOOK3S: PR: Emulate instruction counter
       KVM: PPC: BOOK3S: HV: Update compute_tlbie_rb to handle 16MB base page
 
 Anton Blanchard (2):
       KVM: PPC: Book3S HV: Fix ABIv2 indirect branch issue
       KVM: PPC: Assembly functions exported to modules need _GLOBAL_TOC()
 
 Bharat Bhushan (10):
       kvm: ppc: bookehv: Added wrapper macros for shadow registers
       kvm: ppc: booke: Use the shared struct helpers of SRR0 and SRR1
       kvm: ppc: booke: Use the shared struct helpers of SPRN_DEAR
       kvm: ppc: booke: Add shared struct helpers of SPRN_ESR
       kvm: ppc: booke: Use the shared struct helpers for SPRN_SPRG0-7
       kvm: ppc: Add SPRN_EPR get helper function
       kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit
       KVM: PPC: Booke-hv: Add one reg interface for SPRG9
       KVM: PPC: Remove comment saying SPRG1 is used for vcpu pointer
       KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr
 
 Michael Neuling (1):
       KVM: PPC: Book3S HV: Add H_SET_MODE hcall handling
 
 Mihai Caraman (8):
       KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule
       KVM: PPC: e500: Fix default tlb for victim hint
       KVM: PPC: e500: Emulate power management control SPR
       KVM: PPC: e500mc: Revert "add load inst fixup"
       KVM: PPC: Book3e: Add TLBSEL/TSIZE defines for MAS0/1
       KVM: PPC: Book3s: Remove kvmppc_read_inst() function
       KVM: PPC: Allow kvmppc_get_last_inst() to fail
       KVM: PPC: Bookehv: Get vcpu's last instruction for emulation
 
 Paul Mackerras (4):
       KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling
       KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled
       KVM: PPC: Book3S PR: Take SRCU read lock around RTAS kvm_read_guest() call
       KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication
 
 Stewart Smith (2):
       Split out struct kvmppc_vcore creation to separate function
       Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8
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Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into kvm

Patch queue for ppc - 2014-08-01

Highlights in this release include:

  - BookE: Rework instruction fetch, not racy anymore now
  - BookE HV: Fix ONE_REG accessors for some in-hardware registers
  - Book3S: Good number of LE host fixes, enable HV on LE
  - Book3S: Some misc bug fixes
  - Book3S HV: Add in-guest debug support
  - Book3S HV: Preload cache lines on context switch
  - Remove 440 support

Alexander Graf (31):
      KVM: PPC: Book3s PR: Disable AIL mode with OPAL
      KVM: PPC: Book3s HV: Fix tlbie compile error
      KVM: PPC: Book3S PR: Handle hyp doorbell exits
      KVM: PPC: Book3S PR: Fix ABIv2 on LE
      KVM: PPC: Book3S PR: Fix sparse endian checks
      PPC: Add asm helpers for BE 32bit load/store
      KVM: PPC: Book3S HV: Make HTAB code LE host aware
      KVM: PPC: Book3S HV: Access guest VPA in BE
      KVM: PPC: Book3S HV: Access host lppaca and shadow slb in BE
      KVM: PPC: Book3S HV: Access XICS in BE
      KVM: PPC: Book3S HV: Fix ABIv2 on LE
      KVM: PPC: Book3S HV: Enable for little endian hosts
      KVM: PPC: Book3S: Move vcore definition to end of kvm_arch struct
      KVM: PPC: Deflect page write faults properly in kvmppc_st
      KVM: PPC: Book3S: Stop PTE lookup on write errors
      KVM: PPC: Book3S: Add hack for split real mode
      KVM: PPC: Book3S: Make magic page properly 4k mappable
      KVM: PPC: Remove 440 support
      KVM: Rename and add argument to check_extension
      KVM: Allow KVM_CHECK_EXTENSION on the vm fd
      KVM: PPC: Book3S: Provide different CAPs based on HV or PR mode
      KVM: PPC: Implement kvmppc_xlate for all targets
      KVM: PPC: Move kvmppc_ld/st to common code
      KVM: PPC: Remove kvmppc_bad_hva()
      KVM: PPC: Use kvm_read_guest in kvmppc_ld
      KVM: PPC: Handle magic page in kvmppc_ld/st
      KVM: PPC: Separate loadstore emulation from priv emulation
      KVM: PPC: Expose helper functions for data/inst faults
      KVM: PPC: Remove DCR handling
      KVM: PPC: HV: Remove generic instruction emulation
      KVM: PPC: PR: Handle FSCR feature deselects

Alexey Kardashevskiy (1):
      KVM: PPC: Book3S: Fix LPCR one_reg interface

Aneesh Kumar K.V (4):
      KVM: PPC: BOOK3S: PR: Fix PURR and SPURR emulation
      KVM: PPC: BOOK3S: PR: Emulate virtual timebase register
      KVM: PPC: BOOK3S: PR: Emulate instruction counter
      KVM: PPC: BOOK3S: HV: Update compute_tlbie_rb to handle 16MB base page

Anton Blanchard (2):
      KVM: PPC: Book3S HV: Fix ABIv2 indirect branch issue
      KVM: PPC: Assembly functions exported to modules need _GLOBAL_TOC()

Bharat Bhushan (10):
      kvm: ppc: bookehv: Added wrapper macros for shadow registers
      kvm: ppc: booke: Use the shared struct helpers of SRR0 and SRR1
      kvm: ppc: booke: Use the shared struct helpers of SPRN_DEAR
      kvm: ppc: booke: Add shared struct helpers of SPRN_ESR
      kvm: ppc: booke: Use the shared struct helpers for SPRN_SPRG0-7
      kvm: ppc: Add SPRN_EPR get helper function
      kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit
      KVM: PPC: Booke-hv: Add one reg interface for SPRG9
      KVM: PPC: Remove comment saying SPRG1 is used for vcpu pointer
      KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr

Michael Neuling (1):
      KVM: PPC: Book3S HV: Add H_SET_MODE hcall handling

Mihai Caraman (8):
      KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule
      KVM: PPC: e500: Fix default tlb for victim hint
      KVM: PPC: e500: Emulate power management control SPR
      KVM: PPC: e500mc: Revert "add load inst fixup"
      KVM: PPC: Book3e: Add TLBSEL/TSIZE defines for MAS0/1
      KVM: PPC: Book3s: Remove kvmppc_read_inst() function
      KVM: PPC: Allow kvmppc_get_last_inst() to fail
      KVM: PPC: Bookehv: Get vcpu's last instruction for emulation

Paul Mackerras (4):
      KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling
      KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled
      KVM: PPC: Book3S PR: Take SRCU read lock around RTAS kvm_read_guest() call
      KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication

Stewart Smith (2):
      Split out struct kvmppc_vcore creation to separate function
      Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8

Conflicts:
	Documentation/virtual/kvm/api.txt
2014-08-05 09:58:11 +02:00
Alexander Graf ce91ddc471 KVM: PPC: Remove DCR handling
DCR handling was only needed for 440 KVM. Since we removed it, we can also
remove handling of DCR accesses.

Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-28 19:29:15 +02:00
Alexander Graf 92b591a4c4 KVM: Allow KVM_CHECK_EXTENSION on the vm fd
The KVM_CHECK_EXTENSION is only available on the kvm fd today. Unfortunately
on PPC some of the capabilities change depending on the way a VM was created.

So instead we need a way to expose capabilities as VM ioctl, so that we can
see which VM type we're using (HV or PR). To enable this, add the
KVM_CHECK_EXTENSION ioctl to our vm ioctl portfolio.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-28 15:23:17 +02:00
Alexey Kardashevskiy a0840240c0 KVM: PPC: Book3S: Fix LPCR one_reg interface
Unfortunately, the LPCR got defined as a 32-bit register in the
one_reg interface.  This is unfortunate because KVM allows userspace
to control the DPFD (default prefetch depth) field, which is in the
upper 32 bits.  The result is that DPFD always get set to 0, which
reduces performance in the guest.

We can't just change KVM_REG_PPC_LPCR to be a 64-bit register ID,
since that would break existing userspace binaries.  Instead we define
a new KVM_REG_PPC_LPCR_64 id which is 64-bit.  Userspace can still use
the old KVM_REG_PPC_LPCR id, but it now only modifies those fields in
the bottom 32 bits that userspace can modify (ILE, TC and AIL).
If userspace uses the new KVM_REG_PPC_LPCR_64 id, it can modify DPFD
as well.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-28 15:23:16 +02:00
Paul Mackerras ae2113a4f1 KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled
This adds code to check that when the KVM_CAP_PPC_ENABLE_HCALL
capability is used to enable or disable in-kernel handling of an
hcall, that the hcall is actually implemented by the kernel.
If not an EINVAL error is returned.

This also checks the default-enabled list of hcalls and prints a
warning if any hcall there is not actually implemented.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-28 15:22:18 +02:00
Paul Mackerras 699a0ea082 KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling
This provides a way for userspace controls which sPAPR hcalls get
handled in the kernel.  Each hcall can be individually enabled or
disabled for in-kernel handling, except for H_RTAS.  The exception
for H_RTAS is because userspace can already control whether
individual RTAS functions are handled in-kernel or not via the
KVM_PPC_RTAS_DEFINE_TOKEN ioctl, and because the numeric value for
H_RTAS is out of the normal sequence of hcall numbers.

Hcalls are enabled or disabled using the KVM_ENABLE_CAP ioctl for the
KVM_CAP_PPC_ENABLE_HCALL capability on the file descriptor for the VM.
The args field of the struct kvm_enable_cap specifies the hcall number
in args[0] and the enable/disable flag in args[1]; 0 means disable
in-kernel handling (so that the hcall will always cause an exit to
userspace) and 1 means enable.  Enabling or disabling in-kernel
handling of an hcall is effective across the whole VM.

The ability for KVM_ENABLE_CAP to be used on a VM file descriptor
on PowerPC is new, added by this commit.  The KVM_CAP_ENABLE_CAP_VM
capability advertises that this ability exists.

When a VM is created, an initial set of hcalls are enabled for
in-kernel handling.  The set that is enabled is the set that have
an in-kernel implementation at this point.  Any new hcall
implementations from this point onwards should not be added to the
default set without a good reason.

No distinction is made between real-mode and virtual-mode hcall
implementations; the one setting controls them both.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-28 15:22:17 +02:00
Paolo Bonzini c756ad036f Bugfixes
--------
 - add IPTE to trace event decoder
 - document and advertise KVM_CAP_S390_IRQCHIP
 
 Cleanups
 --------
 - Reuse kvm_vcpu_block for s390
 - Get rid of tasklet for wakup processing
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Merge tag 'kvm-s390-20140721' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next

Bugfixes
--------
- add IPTE to trace event decoder
- document and advertise KVM_CAP_S390_IRQCHIP

Cleanups
--------
- Reuse kvm_vcpu_block for s390
- Get rid of tasklet for wakup processing
2014-07-22 10:22:53 +02:00
Paolo Bonzini ec10b72701 This series enables the "KVM_(S|G)ET_MP_STATE" ioctls on s390 to make
the cpu state settable by user space.
 
 This is necessary to avoid races in s390 SIGP/reset handling which
 happen because some SIGPs are handled in QEMU, while others are
 handled in the kernel. Together with the busy conditions as return
 value of SIGP races happen especially in areas like starting and
 stopping of CPUs. (For example, there is a program 'cpuplugd', that
 runs on several s390 distros which does automatic onlining and
 offlining on cpus.)
 
 As soon as the MPSTATE interface is used, user space takes complete
 control of the cpu states. Otherwise the kernel will use the old way.
 
 Therefore, the new kernel continues to work fine with old QEMUs.
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Merge tag 'kvm-s390-20140715' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next

This series enables the "KVM_(S|G)ET_MP_STATE" ioctls on s390 to make
the cpu state settable by user space.

This is necessary to avoid races in s390 SIGP/reset handling which
happen because some SIGPs are handled in QEMU, while others are
handled in the kernel. Together with the busy conditions as return
value of SIGP races happen especially in areas like starting and
stopping of CPUs. (For example, there is a program 'cpuplugd', that
runs on several s390 distros which does automatic onlining and
offlining on cpus.)

As soon as the MPSTATE interface is used, user space takes complete
control of the cpu states. Otherwise the kernel will use the old way.

Therefore, the new kernel continues to work fine with old QEMUs.
2014-07-21 13:35:43 +02:00
Cornelia Huck 8a366a4bae KVM: s390: document KVM_CAP_S390_IRQCHIP
Let's document that this is a capability that may be enabled per-vm.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-21 13:22:46 +02:00
Cornelia Huck 0907c855b3 KVM: document target of capability enablement
Capabilities can be enabled on a vcpu or (since recently) on a vm. Document
this and note for the existing capabilites whether they are per-vcpu or
per-vm.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-21 13:22:46 +02:00
David Hildenbrand 6352e4d2dd KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state control
This patch
- adds s390 specific MP states to linux headers and documents them
- implements the KVM_{SET,GET}_MP_STATE ioctls
- enables KVM_CAP_MP_STATE
- allows user space to control the VCPU state on s390.

If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable
manual changing of the VCPU state and trust user space to do the right thing.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10 14:11:17 +02:00
David Hildenbrand 0b4820d6d8 KVM: prepare for KVM_(S|G)ET_MP_STATE on other architectures
Highlight the aspects of the ioctls that are actually specific to x86
and ia64. As defined restrictions (irqchip) and mp states may not apply
to other architectures, these parts are flagged to belong to x86 and ia64.

In preparation for the use of KVM_(S|G)ET_MP_STATE by s390.
Fix a spelling error (KVM_SET_MP_STATE vs. KVM_SET_MPSTATE) on the way.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10 14:10:36 +02:00
James Hogan c2d2c21bff KVM: MIPS: Document MIPS specifics of KVM API.
Document the MIPS specific parts of the KVM API, including:
 - The layout of the kvm_regs structure.
 - The interrupt number passed to KVM_INTERRUPT.
 - The registers supported by the KVM_{GET,SET}_ONE_REG interface, and
   the encoding of those register ids.
 - That KVM_INTERRUPT and KVM_GET_REG_LIST are supported on MIPS.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-09 18:09:59 +02:00
James Hogan bf5590f379 KVM: Reformat KVM_SET_ONE_REG register documentation
Some of the MIPS registers that can be accessed with the
KVM_{GET,SET}_ONE_REG interface have fairly long names, so widen the
Register column of the table in the KVM_SET_ONE_REG documentation to
allow them to fit.

Tabs in the table are replaced with spaces at the same time for
consistency.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-09 18:09:58 +02:00
James Hogan 572e09290a KVM: Document KVM_SET_SIGNAL_MASK as universal
KVM_SET_SIGNAL_MASK is implemented in generic code and isn't x86
specific, so document it as being applicable for all architectures.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-09 18:09:58 +02:00
Linus Torvalds 1aacb90eaa Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next
Pull trivial tree changes from Jiri Kosina:
 "Usual pile of patches from trivial tree that make the world go round"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
  staging: go7007: remove reference to CONFIG_KMOD
  aic7xxx: Remove obsolete preprocessor define
  of: dma: doc fixes
  doc: fix incorrect formula to calculate CommitLimit value
  doc: Note need of bc in the kernel build from 3.10 onwards
  mm: Fix printk typo in dmapool.c
  modpost: Fix comment typo "Modules.symvers"
  Kconfig.debug: Grammar s/addition/additional/
  wimax: Spelling s/than/that/, wording s/destinatary/recipient/
  aic7xxx: Spelling s/termnation/termination/
  arm64: mm: Remove superfluous "the" in comment
  of: Spelling s/anonymouns/anonymous/
  dma: imx-sdma: Spelling s/determnine/determine/
  ath10k: Improve grammar in comments
  ath6kl: Spelling s/determnine/determine/
  of: Improve grammar for of_alias_get_id() documentation
  drm/exynos: Spelling s/contro/control/
  radio-bcm2048.c: fix wrong overflow check
  doc: printk-formats: do not mention casts for u64/s64
  doc: spelling error changes
  ...
2014-06-04 08:50:34 -07:00
Linus Torvalds b05d59dfce At over 200 commits, covering almost all supported architectures, this
was a pretty active cycle for KVM.  Changes include:
 
 - a lot of s390 changes: optimizations, support for migration,
   GDB support and more
 
 - ARM changes are pretty small: support for the PSCI 0.2 hypercall
   interface on both the guest and the host (the latter acked by Catalin)
 
 - initial POWER8 and little-endian host support
 
 - support for running u-boot on embedded POWER targets
 
 - pretty large changes to MIPS too, completing the userspace interface
   and improving the handling of virtualized timer hardware
 
 - for x86, a larger set of changes is scheduled for 3.17.  Still,
   we have a few emulator bugfixes and support for running nested
   fully-virtualized Xen guests (para-virtualized Xen guests have
   always worked).  And some optimizations too.
 
 The only missing architecture here is ia64.  It's not a coincidence
 that support for KVM on ia64 is scheduled for removal in 3.17.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm into next

Pull KVM updates from Paolo Bonzini:
 "At over 200 commits, covering almost all supported architectures, this
  was a pretty active cycle for KVM.  Changes include:

   - a lot of s390 changes: optimizations, support for migration, GDB
     support and more

   - ARM changes are pretty small: support for the PSCI 0.2 hypercall
     interface on both the guest and the host (the latter acked by
     Catalin)

   - initial POWER8 and little-endian host support

   - support for running u-boot on embedded POWER targets

   - pretty large changes to MIPS too, completing the userspace
     interface and improving the handling of virtualized timer hardware

   - for x86, a larger set of changes is scheduled for 3.17.  Still, we
     have a few emulator bugfixes and support for running nested
     fully-virtualized Xen guests (para-virtualized Xen guests have
     always worked).  And some optimizations too.

  The only missing architecture here is ia64.  It's not a coincidence
  that support for KVM on ia64 is scheduled for removal in 3.17"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (203 commits)
  KVM: add missing cleanup_srcu_struct
  KVM: PPC: Book3S PR: Rework SLB switching code
  KVM: PPC: Book3S PR: Use SLB entry 0
  KVM: PPC: Book3S HV: Fix machine check delivery to guest
  KVM: PPC: Book3S HV: Work around POWER8 performance monitor bugs
  KVM: PPC: Book3S HV: Make sure we don't miss dirty pages
  KVM: PPC: Book3S HV: Fix dirty map for hugepages
  KVM: PPC: Book3S HV: Put huge-page HPTEs in rmap chain for base address
  KVM: PPC: Book3S HV: Fix check for running inside guest in global_invalidates()
  KVM: PPC: Book3S: Move KVM_REG_PPC_WORT to an unused register number
  KVM: PPC: Book3S: Add ONE_REG register names that were missed
  KVM: PPC: Add CAP to indicate hcall fixes
  KVM: PPC: MPIC: Reset IRQ source private members
  KVM: PPC: Graciously fail broken LE hypercalls
  PPC: ePAPR: Fix hypercall on LE guest
  KVM: PPC: BOOK3S: Remove open coded make_dsisr in alignment handler
  KVM: PPC: BOOK3S: Always use the saved DAR value
  PPC: KVM: Make NX bit available with magic page
  KVM: PPC: Disable NX for old magic page using guests
  KVM: PPC: BOOK3S: HV: Add mixed page-size support for guest
  ...
2014-06-04 08:47:12 -07:00
Paolo Bonzini 53ea2e462e Patch queue for ppc - 2014-05-30
In this round we have a few nice gems. PR KVM gains initial POWER8 support
 as well as LE host awareness, ihe e500 targets can now properly run u-boot,
 LE guests now work with PR KVM including KVM hypercalls and HV KVM guests
 can now use huge pages.
 
 On top of this there are some bug fixes.
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Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into kvm-next

Patch queue for ppc - 2014-05-30

In this round we have a few nice gems. PR KVM gains initial POWER8 support
as well as LE host awareness, ihe e500 targets can now properly run u-boot,
LE guests now work with PR KVM including KVM hypercalls and HV KVM guests
can now use huge pages.

On top of this there are some bug fixes.

Conflicts:
	include/uapi/linux/kvm.h
2014-05-30 14:51:40 +02:00
Paul Mackerras e1d8a96daf KVM: PPC: Book3S: Move KVM_REG_PPC_WORT to an unused register number
Commit b005255e12 ("KVM: PPC: Book3S HV: Context-switch new POWER8
SPRs") added a definition of KVM_REG_PPC_WORT with the same register
number as the existing KVM_REG_PPC_VRSAVE (though in fact the
definitions are not identical because of the different register sizes.)

For clarity, this moves KVM_REG_PPC_WORT to the next unused number,
and also adds it to api.txt.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30 14:26:28 +02:00
Paul Mackerras 2f9c6943c5 KVM: PPC: Book3S: Add ONE_REG register names that were missed
Commit 3b7834743f ("KVM: PPC: Book3S HV: Reserve POWER8 space in get/set_one_reg") added definitions for several KVM_REG_PPC_* symbols
but missed adding some to api.txt.  This adds them.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30 14:26:27 +02:00
Alexander Graf f3383cf80e KVM: PPC: Disable NX for old magic page using guests
Old guests try to use the magic page, but map their trampoline code inside
of an NX region.

Since we can't fix those old kernels, try to detect whether the guest is sane
or not. If not, just disable NX functionality in KVM so that old guests at
least work at all. For newer guests, add a bit that we can set to keep NX
functionality available.

Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30 14:26:24 +02:00
Paolo Bonzini 04092204bb Changed for the 3.16 merge window.
This includes KVM support for PSCI v0.2 and also includes generic Linux
 support for PSCI v0.2 (on hosts that advertise that feature via their
 DT), since the latter depends on headers introduced by the former.
 
 Finally there's a small patch from Marc that enables Cortex-A53 support.
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Merge tag 'kvm-arm-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-next

Changed for the 3.16 merge window.

This includes KVM support for PSCI v0.2 and also includes generic Linux
support for PSCI v0.2 (on hosts that advertise that feature via their
DT), since the latter depends on headers introduced by the former.

Finally there's a small patch from Marc that enables Cortex-A53 support.
2014-05-27 15:58:14 +02:00
Cornelia Huck ebc3226202 KVM: s390: announce irqfd capability
s390 has acquired irqfd support with commit "KVM: s390: irq routing for
adapter interrupts" (8422359877) but
failed to announce it. Let's fix that.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-05-15 10:55:10 +02:00
Thomas Huth e029ae5b78 KVM: s390: Add clock comparator and CPU timer IRQ injection
Add an interface to inject clock comparator and CPU timer interrupts
into the guest. This is needed for handling the external interrupt
interception.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-05-06 14:58:05 +02:00
Carlos Garcia c98be0c96d doc: spelling error changes
Fixed multiple spelling errors.

Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Carlos E. Garcia <carlos@cgarcia.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-05-05 15:32:05 +02:00
Anup Patel 8ad6b63492 KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header
Currently, we don't have an exit reason to notify user space about
a system-level event (for e.g. system reset or shutdown) triggered
by the VCPU. This patch adds exit reason KVM_EXIT_SYSTEM_EVENT for
this purpose. We can also inform user space about the 'type' and
architecture specific 'flags' of a system-level event using the
kvm_run structure.

This newly added KVM_EXIT_SYSTEM_EVENT will be used by KVM ARM/ARM64
in-kernel PSCI v0.2 support to reset/shutdown VMs.

Signed-off-by: Anup Patel <anup.patel@linaro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2014-04-30 04:18:58 -07:00
Anup Patel 50bb0c9475 KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature
We have in-kernel emulation of PSCI v0.2 in KVM ARM/ARM64. To provide
PSCI v0.2 interface to VCPUs, we have to enable KVM_ARM_VCPU_PSCI_0_2
feature when doing KVM_ARM_VCPU_INIT ioctl.

The patch updates documentation of KVM_ARM_VCPU_INIT ioctl to provide
info regarding KVM_ARM_VCPU_PSCI_0_2 feature.

Signed-off-by: Anup Patel <anup.patel@linaro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2014-04-30 04:18:57 -07:00
David Hildenbrand ffad018cc0 KVM: s390: add documentation for diag 501
Added documentation for diag 501, stating that no subfunctions are provided and
no parameters are used.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22 13:24:51 +02:00
Dominik Dingel 4f718eab26 KVM: s390: Exploiting generic userspace interface for cmma
To enable CMMA and to reset its state we use the vm kvm_device ioctls,
encapsulating attributes within the KVM_S390_VM_MEM_CTRL group.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22 13:24:32 +02:00
Dominik Dingel f206165620 KVM: s390: Per-vm kvm device controls
We sometimes need to get/set attributes specific to a virtual machine
and so need something else than ONE_REG.

Let's copy the KVM_DEVICE approach, and define the respective ioctls
for the vm file descriptor.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22 13:24:12 +02:00
Linus Torvalds 159d8133d0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
 "Usual rocket science -- mostly documentation and comment updates"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  sparse: fix comment
  doc: fix double words
  isdn: capi: fix "CAPI_VERSION" comment
  doc: DocBook: Fix typos in xml and template file
  Bluetooth: add module name for btwilink
  driver core: unexport static function create_syslog_header
  mmc: core: typo fix in printk specifier
  ARM: spear: clean up editing mistake
  net-sysfs: fix comment typo 'CONFIG_SYFS'
  doc: Insert MODULE_ in module-signing macros
  Documentation: update URL to hfsplus Technote 1150
  gpio: update path to documentation
  ixgbe: Fix format string in ixgbe_fcoe.
  Kconfig: Remove useless "default N" lines
  user_namespace.c: Remove duplicated word in comment
  CREDITS: fix formatting
  treewide: Fix typo in Documentation/DocBook
  mm: Fix warning on make htmldocs caused by slab.c
  ata: ata-samsung_cf: cleanup in header file
  idr: remove unused prototype of idr_free()
2014-04-02 16:23:38 -07:00
Christoffer Dall 6acdb1603a KVM: Specify byte order for KVM_EXIT_MMIO
The KVM API documentation is not clear about the semantics of the data
field on the mmio struct on the kvm_run struct.

This has become problematic when supporting ARM guests on big-endian
host systems with guests of both endianness types, because it is unclear
how the data should be exported to user space.

This should not break with existing implementations as all supported
existing implementations of known user space applications (QEMU and
kvmtools for virtio) only support default endianness of the
architectures on the host side.

Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-03-27 18:25:18 +01:00
Cornelia Huck 8422359877 KVM: s390: irq routing for adapter interrupts.
Introduce a new interrupt class for s390 adapter interrupts and enable
irqfds for s390.

This is depending on a new s390 specific vm capability, KVM_CAP_S390_IRQCHIP,
that needs to be enabled by userspace.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-03-21 13:43:00 +01:00