Messages in this thread | | | Date | Fri, 29 Oct 2021 16:39:23 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v3 01/21] x86/cpufreatures: add AMD Collaborative Processor Performance Control feature flag |
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On Fri, Oct 29, 2021 at 09:02:21PM +0800, Huang Rui wrote: > Add Collaborative Processor Performance Control feature flag for AMD > processors. > > This feature flag will be used on the following amd-pstate driver. The > amd-pstate driver has two approaches to implement the frequency control > behavior. That depends on the CPU hardware implementation. One is "Full > MSR Support" and another is "Shared Memory Support". The feature flag > indicates the current processors with "Full MSR Support". > > Signed-off-by: Huang Rui <ray.huang@amd.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 d0ce5cfd3ac1..f23dc1abd485 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -313,6 +313,7 @@ > #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_CPPC (13*32+27) /* Collaborative Processor Performance Control */ > > /* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */ > #define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */ > --
Acked-by: Borislav Petkov <bp@suse.de>
-- Regards/Gruss, Boris.
SUSE Software Solutions Germany GmbH, GF: Ivo Totev, HRB 36809, AG Nürnberg
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