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[v11,03/13] x86/msr-index: define AMD heterogeneous CPU related MSR

Message ID 20250609200518.3616080-4-superm1@kernel.org
State New
Headers show
Series Add support for AMD hardware feedback interface | expand

Commit Message

Mario Limonciello June 9, 2025, 8:05 p.m. UTC 
From: Perry Yuan <perry.yuan@amd.com>

Introduces new MSR registers for AMD hardware feedback support.
These registers enable the system to provide workload classification
and configuration capabilities.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v11:
 * Prefix new MSRs with MSR_AMD
---
 arch/x86/include/asm/msr-index.h | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index b7dded3c81132..4dbf6dbf4c1da 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -732,6 +732,11 @@ 
 #define MSR_AMD64_PERF_CNTR_GLOBAL_CTL		0xc0000301
 #define MSR_AMD64_PERF_CNTR_GLOBAL_STATUS_CLR	0xc0000302
 
+/* AMD Hardware Feedback Support MSRs */
+#define MSR_AMD_WORKLOAD_CLASS_CONFIG		0xc0000500
+#define MSR_AMD_WORKLOAD_CLASS_ID		0xc0000501
+#define MSR_AMD_WORKLOAD_HRST			0xc0000502
+
 /* AMD Last Branch Record MSRs */
 #define MSR_AMD64_LBR_SELECT			0xc000010e