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| author | Ricardo Cañuelo <ricardo.canuelo@collabora.com> | 2022-04-01 09:45:17 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-05 21:55:57 +0200 |
| commit | 0205f8a738ab9e62d849e88e543cfa6ce4c13163 (patch) | |
| tree | 3bd3ddea3f0c019a939ab5b97f8bcd170ec75a9a /arch/x86/include/asm/suspend_32.h | |
| parent | f8858b5eff30d1b2be15ef1ea6285964013b95e6 (diff) | |
| download | linux-stable-0205f8a738ab9e62d849e88e543cfa6ce4c13163.tar.gz linux-stable-0205f8a738ab9e62d849e88e543cfa6ce4c13163.tar.bz2 linux-stable-0205f8a738ab9e62d849e88e543cfa6ce4c13163.zip | |
x86/speculation/srbds: Do not try to turn mitigation off when not supported
When SRBDS is mitigated by TSX OFF, update_srbds_msr() will still read
and write to MSR_IA32_MCU_OPT_CTRL even when that MSR is not supported
due to not having loaded the appropriate microcode.
Check for X86_FEATURE_SRBDS_CTRL which is set only when the respective
microcode which adds MSR_IA32_MCU_OPT_CTRL is loaded.
Based on a patch by Thadeu Lima de Souza Cascardo <cascardo@canonical.com>.
[ bp: Massage commit message. ]
Suggested-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220401074517.1848264-1-ricardo.canuelo@collabora.com
Diffstat (limited to 'arch/x86/include/asm/suspend_32.h')
0 files changed, 0 insertions, 0 deletions