Re: [tip: x86/urgent] x86/cpu/amd: Fix workaround for erratum 1054

* Borislav Petkov bp@alien8.de wrote:

...

plus the erratum is a perf-counters information quality bug affecting what appears to be a limited number of models, with the workaround

No, the fix is needed because Zen2 and newer won't set MSR_K7_HWCR_IRPERF_EN_BIT. It needs to go everywhere.

Fair enough - the current version already has Cc: stable:

263e55949d89 x86/cpu/amd: Fix workaround for erratum 1054

...

Fixes: 232afb557835 ("x86/CPU/AMD: Add X86_FEATURE_ZEN1") Signed-off-by: Sandipan Das sandipan.das@amd.com Signed-off-by: Ingo Molnar mingo@kernel.org Acked-by: Borislav Petkov bp@alien8.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/caa057a9d6f8ad579e2f1abaa71efbd5bd4eaf6d.174495646...

Thanks,

Ingo