Commit 23a79cb0 authored Jun 24, 2024 by Srinivas Pandruvada Committed by Jia, Yingbao Nov 26, 2024

x86/cpufeatures: Add HWP highest perf change feature flag

mainline inclusion
from mainline-v6.11
commit 7ea81936b85317aee8a73cd35d7f9cd6ce654dee
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/IB6QC4
CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7ea81936b85317aee8a73cd35d7f9cd6ce654dee



-------------------------------------------------

Intel-SIG: commit 7ea81936b853 x86/cpufeatures: Add HWP highest perf change feature flag.
Backport intel_pstate driver update for 6.6 from 6.11

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


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ Yingbao Jia: amend commit log ]
Signed-off-by: Yingbao Jia <yingbao.jia@intel.com>

parent a3c70918

arch/x86/include/asm/cpufeatures.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -380,6 +380,7 @@
		#define X86_FEATURE_HWP_ACT_WINDOW (1432+ 9) / HWP Activity Window */
		#define X86_FEATURE_HWP_EPP (1432+10) / HWP Energy Perf. Preference */
		#define X86_FEATURE_HWP_PKG_REQ (1432+11) / HWP Package Level Request */
		#define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (1432+15) / "" HWP Highest perf change */
		#define X86_FEATURE_HFI (1432+19) / Hardware Feedback Interface */

		/* AMD SVM Feature Identification, CPUID level 0x8000000a (EDX), word 15 */