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| author | Pawan Gupta <[email protected]> | 2024-03-11 19:29:43 +0000 |
|---|---|---|
| committer | Dave Hansen <[email protected]> | 2024-03-11 20:13:50 +0000 |
| commit | 2a0180129d726a4b953232175857d442651b55a0 (patch) | |
| tree | 5ea4ad5ba07c2966d49d4c00d4c2ca0798b37214 /tools/perf/util/annotate.c | |
| parent | x86/rfds: Mitigate Register File Data Sampling (RFDS) (diff) | |
| download | kernel-2a0180129d726a4b953232175857d442651b55a0.tar.gz kernel-2a0180129d726a4b953232175857d442651b55a0.zip | |
KVM/x86: Export RFDS_NO and RFDS_CLEAR to guests
Mitigation for RFDS requires RFDS_CLEAR capability which is enumerated
by MSR_IA32_ARCH_CAPABILITIES bit 27. If the host has it set, export it
to guests so that they can deploy the mitigation.
RFDS_NO indicates that the system is not vulnerable to RFDS, export it
to guests so that they don't deploy the mitigation unnecessarily. When
the host is not affected by X86_BUG_RFDS, but has RFDS_NO=0, synthesize
RFDS_NO to the guest.
Signed-off-by: Pawan Gupta <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Acked-by: Josh Poimboeuf <[email protected]>
Diffstat (limited to 'tools/perf/util/annotate.c')
0 files changed, 0 insertions, 0 deletions