x86/cpufeatures: Add AMD Collaborative Processor Performance Control feature flag

Add Collaborative Processor Performance Control feature flag for AMD
processors.

This feature flag will be used on the following AMD P-State driver. The
AMD P-State 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".

Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Huang Rui 2021-12-24 09:04:55 +08:00 committed by Rafael J. Wysocki
parent 5ee22fa4a9
commit d341db8f48
1 changed files with 1 additions and 0 deletions

View File

@ -315,6 +315,7 @@
#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_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 */