| Message ID | 20240618035122.438822-2-srinivas.pandruvada@linux.intel.com (mailing list archive) |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
| Series | Update highest frequency of a CPU after boot | expand |
On Mon, Jun 17, 2024 at 08:51:20PM -0700, Srinivas Pandruvada wrote: > When CPUID[6].EAX[15] is set to 1, this CPU supports notification for > HWP (Hardware P-states) highest performance change. > > Add a feature flag to check if the CPU supports HWP highest performance > change. > > Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.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 3c7434329661..4674ba5310b2 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -361,6 +361,7 @@ > #define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */ > #define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */ > #define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */ > +#define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* HWP Highest perf change */ Doesn't belong in /proc/cpuinfo: #define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* "" HWP Highest perf change */ ^^^^^
On Tue, 2024-06-18 at 11:07 +0200, Borislav Petkov wrote: > On Mon, Jun 17, 2024 at 08:51:20PM -0700, Srinivas Pandruvada wrote: > > When CPUID[6].EAX[15] is set to 1, this CPU supports notification > > for > > HWP (Hardware P-states) highest performance change. > > > > Add a feature flag to check if the CPU supports HWP highest > > performance > > change. > > > > [...] > > +#define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* HWP > > Highest perf change */ > > Doesn't belong in /proc/cpuinfo: > > #define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* "" HWP > Highest perf change */ > > ^^^^^ Thanks for pointing this out. Will update in v2. -Srinivas > >
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 3c7434329661..4674ba5310b2 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -361,6 +361,7 @@ #define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */ #define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */ #define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */ +#define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* HWP Highest perf change */ #define X86_FEATURE_HFI (14*32+19) /* Hardware Feedback Interface */ /* AMD SVM Feature Identification, CPUID level 0x8000000a (EDX), word 15 */
When CPUID[6].EAX[15] is set to 1, this CPU supports notification for HWP (Hardware P-states) highest performance change. Add a feature flag to check if the CPU supports HWP highest performance change. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> --- arch/x86/include/asm/cpufeatures.h | 1 + 1 file changed, 1 insertion(+)