linux/Documentation/x86
Pawan Gupta 913ae894c2 x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key
commit 6613d82e61 upstream.

The VERW mitigation at exit-to-user is enabled via a static branch
mds_user_clear. This static branch is never toggled after boot, and can
be safely replaced with an ALTERNATIVE() which is convenient to use in
asm.

Switch to ALTERNATIVE() to use the VERW mitigation late in exit-to-user
path. Also remove the now redundant VERW in exc_nmi() and
arch_exit_to_user_mode().

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20240213-delay-verw-v8-4-a6216d83edb7%40linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-04-10 16:18:48 +02:00
..
i386 Documentation: x86: convert i386/IO-APIC.txt to reST 2019-05-08 14:34:11 -06:00
x86_64 Another collection of documentation patches, mostly fixes but also includes 2021-09-08 16:28:14 -07:00
amd-memory-encryption.rst x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
boot.rst docs: x86: avoid using ReST :doc:foo markup 2021-06-17 13:24:39 -06:00
booting-dt.rst dt: Remove booting-without-of.rst 2020-10-13 13:33:16 -05:00
buslock.rst Documentation/x86: Add ratelimit in buslock.rst 2021-05-18 16:39:31 +02:00
cpuinfo.rst Documentation/x86: Add documentation for /proc/cpuinfo feature flags 2020-09-01 11:07:15 +02:00
earlyprintk.rst Documentation: x86: earlyprintk: drop doubled words 2020-07-13 09:47:38 -06:00
elf_auxvec.rst x86/elf: Support a new ELF aux vector AT_MINSIGSTKSZ 2021-05-19 12:18:45 +02:00
entry_64.rst Documentation: x86: convert entry_64.txt to reST 2019-05-08 14:34:09 -06:00
exception-tables.rst Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-03-31 11:04:05 -07:00
features.rst docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
index.rst Fixes and improvements for FPU handling on x86: 2021-07-07 11:12:01 -07:00
intel_txt.rst docs: x86: move two x86-specific files to x86 arch dir 2019-07-15 11:03:01 -03:00
intel-iommu.rst docs: prevent warnings due to autosectionlabel 2020-03-20 17:01:29 -06:00
kernel-stacks.rst Some late arriving documentation changes. In particular, this contains the 2019-05-10 13:24:53 -04:00
mds.rst x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key 2024-04-10 16:18:48 +02:00
microcode.rst Documentation: x86: convert microcode.txt to reST 2019-05-08 14:34:11 -06:00
mtrr.rst docs: x86: avoid using ReST :doc:foo markup 2021-06-17 13:24:39 -06:00
orc-unwinder.rst Documentation: x86: convert orc-unwinder.txt to reST 2019-05-08 14:34:11 -06:00
pat.rst remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
pti.rst Documentation: x86: convert pti.txt to reST 2019-05-08 14:34:10 -06:00
resctrl.rst Documentation/x86: Rename resctrl_ui.rst and add two errata to the file 2020-10-27 16:47:00 +01:00
sgx.rst x86/sgx: Introduce virtual EPC for use by KVM guests 2021-04-06 09:43:17 +02:00
sva.rst Documentation/x86: Add documentation for SVA (Shared Virtual Addressing) 2020-09-17 19:29:42 +02:00
tlb.rst Documentation: x86: convert tlb.txt to reST 2019-05-08 14:34:10 -06:00
topology.rst x86/CPU/AMD: Save AMD NodeId as cpu_die_id 2020-11-19 11:43:13 +01:00
tsx_async_abort.rst x86/speculation/taa: Add documentation for TSX Async Abort 2019-10-28 08:37:00 +01:00
usb-legacy-support.rst Documentation: x86: convert usb-legacy-support.txt to reST 2019-05-08 14:34:11 -06:00
zero-page.rst Documentation: x86: convert zero-page.txt to reST 2019-05-08 14:34:10 -06:00