From 4368f6eac68b37dcffd7298de0db148f84741fd6 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Mon, 2 Dec 2024 17:28:43 +0100 Subject: [PATCH] x86/cpufeatures: Add HWP highest perf change feature flag BugLink: https://bugs.launchpad.net/bugs/2090852 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 Link: https://patch.msgid.link/20240624161109.1427640-2-srinivas.pandruvada@linux.intel.com Signed-off-by: Rafael J. Wysocki (cherry picked from commit 7ea81936b85317aee8a73cd35d7f9cd6ce654dee) Signed-off-by: Thibault Ferrante Acked-by: Agathe Porte Acked-by: Magali Lemes Signed-off-by: Roxana Nicolescu --- 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 76b3b00ff102..f0974a7d88eb 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -359,6 +359,7 @@ #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 */