Commit 7ea81936 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
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x86/cpufeatures: Add HWP highest perf change feature flag 



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: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20240624161109.1427640-2-srinivas.pandruvada@linux.intel.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent f53b4bb8

arch/x86/include/asm/cpufeatures.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */