Messages in this thread | | | From | Stephane Eranian <> | Date | Fri, 10 Dec 2021 13:25:34 -0800 | Subject | Re: [PATCH v4 02/14] x86/cpufeatures: add AMD Fam19h Branch Sampling feature |
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On Fri, Dec 10, 2021 at 1:21 PM Borislav Petkov <bp@alien8.de> wrote: > > On Fri, Dec 10, 2021 at 01:02:17PM -0800, Stephane Eranian wrote: > > This patch adds a cpu feature for AMD Fam19h Branch Sampling feature as bit > > 31 of EBX on CPUID leaf function 0x80000008. > > > > Signed-off-by: Stephane Eranian <eranian@google.com> > > --- > > arch/x86/include/asm/cpufeatures.h | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > > index d5b5f2ab87a0..e71443f93f04 100644 > > --- a/arch/x86/include/asm/cpufeatures.h > > +++ b/arch/x86/include/asm/cpufeatures.h > > @@ -315,6 +315,7 @@ > > #define X86_FEATURE_AMD_SSBD (13*32+24) /* "" Speculative Store Bypass Disable */ > > #define X86_FEATURE_VIRT_SSBD (13*32+25) /* Virtualized Speculative Store Bypass Disable */ > > #define X86_FEATURE_AMD_SSB_NO (13*32+26) /* "" Speculative Store Bypass is fixed in hardware. */ > > +#define X86_FEATURE_AMD_BRS (13*32+31) /* Branch Sampling available */ > > > > /* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */ > > #define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */ > > -- > > It seems you missed my note from the last time: > > https://lore.kernel.org/r/YY0OUNqv1w/ihmHX@zn.tnic > Yes, I missed that. No worry, I will fix in V5. Thanks for pointing it out.
> > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette
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