WSL2-Linux-Kernel

The source for the Linux kernel used in Windows Subsystem for Linux 2 (WSL2)

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James Morse 77137d50c9 arm64: cpufeature: Force HWCAP to be based on the sysreg visible to user-space [ Upstream commit `237405ebef` ] arm64 advertises hardware features to user-space via HWCAPs, and by emulating access to the CPUs id registers. The cpufeature code has a sanitised system-wide view of an id register, and a sanitised user-space view of an id register, where some features use their 'safe' value instead of the hardware value. It is currently possible for a HWCAP to be advertised where the user-space view of the id register does not show the feature as supported. Erratum workaround need to remove both the HWCAP, and the feature from the user-space view of the id register. This involves duplicating the code, and spreading it over cpufeature.c and cpu_errata.c. Make the HWCAP code use the user-space view of id registers. This ensures the values never diverge, and allows erratum workaround to remove HWCAP by modifying the user-space view of the id register. Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20220909165938.3931307-2-james.morse@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [ Mark: fixup lack of 'width' parameter ] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-19 05:45:40 +02:00
Documentation	profiling: remove profile=sleep support	2024-08-19 05:45:39 +02:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
arch	arm64: cpufeature: Force HWCAP to be based on the sysreg visible to user-space	2024-08-19 05:45:40 +02:00
block	block: initialize integrity buffer to zero before writing it to media	2024-08-19 05:44:50 +02:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:22:01 +02:00
crypto	crypto: aead,cipher - zeroize key buffer after use	2024-07-18 13:07:27 +02:00
drivers	scsi: mpt3sas: Avoid IOMMU page faults on REPORT ZONES	2024-08-19 05:45:39 +02:00
fs	ext4: fix wrong unit use in ext4_mb_find_by_goal	2024-08-19 05:45:39 +02:00
include	profiling: remove profile=sleep support	2024-08-19 05:45:39 +02:00
init	init/main.c: Fix potential static_command_line memory overflow	2024-04-27 17:05:28 +02:00
io_uring	io_uring/io-wq: limit retrying worker initialisation	2024-08-19 05:45:22 +02:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2022-12-08 11:28:45 +01:00
kernel	sched/cputime: Fix mul_u64_u64_div_u64() precision for cputime	2024-08-19 05:45:39 +02:00
lib	kobject_uevent: Fix OOB access within zap_modalias_env()	2024-08-19 05:45:17 +02:00
mm	mm/numa_balancing: teach mpol_to_str about the balancing mode	2024-08-19 05:45:17 +02:00
net	SUNRPC: Fix a race to wake a sync task	2024-08-19 05:45:39 +02:00
samples	Add gitignore file for samples/fanotify/ subdirectory	2024-07-27 10:46:16 +02:00
scripts	kbuild: Fix '-S -c' in x86 stack protector scripts	2024-08-19 05:45:16 +02:00
security	apparmor: Fix null pointer deref when receiving skb during sock creation	2024-08-19 05:45:25 +02:00
sound	Revert "ALSA: firewire-lib: operate for period elapse event in process context"	2024-08-19 05:45:34 +02:00
tools	selftests/bpf: Fix send_signal test with nested CONFIG_PARAVIRT	2024-08-19 05:45:37 +02:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:27:15 +01:00
virt	KVM: Always flush async #PF workqueue when vCPU is being destroyed	2024-04-10 16:18:34 +02:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig	…
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	trace: Relocate event helper files	2024-04-10 16:19:24 +02:00
Makefile	Linux 5.15.164	2024-07-27 10:46:18 +02:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.