diff options
| author | Ricardo Cañuelo <[email protected]> | 2022-04-01 09:45:17 +0200 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2022-04-05 21:55:57 +0200 |
| commit | 0205f8a738ab9e62d849e88e543cfa6ce4c13163 (patch) | |
| tree | 3bd3ddea3f0c019a939ab5b97f8bcd170ec75a9a /tools/perf/util/c++/clang.cpp | |
| parent | f8858b5eff30d1b2be15ef1ea6285964013b95e6 (diff) | |
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 <[email protected]>.
[ bp: Massage commit message. ]
Suggested-by: Pawan Gupta <[email protected]>
Signed-off-by: Ricardo Cañuelo <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/util/c++/clang.cpp')
0 files changed, 0 insertions, 0 deletions