x86/msr-index: Add AMD workload classification MSRs

JIRA: https://issues.redhat.com/browse/RHEL-107081

commit a3c4f33
Author: Perry Yuan <perry.yuan@amd.com>
Date:   Mon Jun 9 15:05:08 2025 -0500

    x86/msr-index: Add AMD workload classification MSRs

    Introduce new MSR registers for AMD hardware feedback support.  They provide
    workload classification and configuration capabilities.

    Signed-off-by: Perry Yuan <perry.yuan@amd.com>
    Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
    Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
    Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
    Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Link: https://lore.kernel.org/20250609200518.3616080-4-superm1@kernel.org

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

arch/x86/include/asm/msr-index.h

@@ -728,6 +728,11 @@
 #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