File cpupower-Update-family-checks-when-decoding-HW-pstates.patch of Package cpupower.22252

From: Nathan Fontenot <nathan.fontenot@amd.com>
Subject: cpupower: Update family checks when decoding HW pstates
References: jsc#SLE-17797
Patch-Mainline: v5.12-rc1-dontuse
Git-commit: 23765b82a808da416b70b41d711468e723531e6a


The family checks in get_cof() and get_did() need to use the
correct MSR format depending on the family. Add a cpupower
capability for using the pstatedef (family 17h and newer) to
control this instead of direct family checks.

Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>


Signed-off-by:  <trenn@suse.com>
diff --git a/utils/helpers/amd.c b/utils/helpers/amd.c
index fc2ac1e6bfb2..b4731daa6820 100644
--- a/utils/helpers/amd.c
+++ b/utils/helpers/amd.c
@@ -45,10 +45,10 @@ static int get_did(int family, union core_pstate pstate)
 {
 	int t;
 
-	if (family == 0x12)
-		t = pstate.val & 0xf;
-	else if (family == 0x17 || family == 0x18)
+	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF)
 		t = pstate.pstatedef.did;
+	else if (family == 0x12)
+		t = pstate.val & 0xf;
 	else
 		t = pstate.pstate.did;
 
@@ -61,7 +61,7 @@ static int get_cof(int family, union core_pstate pstate)
 	int fid, did, cof;
 
 	did = get_did(family, pstate);
-	if (family == 0x17 || family == 0x18) {
+	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) {
 		fid = pstate.pstatedef.fid;
 		cof = 200 * fid / did;
 	} else {
diff --git a/utils/helpers/cpuid.c b/utils/helpers/cpuid.c
index d577220a193b..db2e88ceb67b 100644
--- a/utils/helpers/cpuid.c
+++ b/utils/helpers/cpuid.c
@@ -133,9 +133,13 @@ int get_cpu_info(struct cpupower_cpu_info *cpu_info)
 				cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
 
 			if ((cpuid_edx(0x80000007) & (1 << 7)) &&
-			    cpu_info->family != 0x14)
+			    cpu_info->family != 0x14) {
 				/* HW pstate was not implemented in family 0x14 */
 				cpu_info->caps |= CPUPOWER_CAP_AMD_HW_PSTATE;
+
+				if (cpu_info->family >= 0x17)
+					cpu_info->caps |= CPUPOWER_CAP_AMD_PSTATEDEF;
+			}
 		}
 
 		if (ext_cpuid_level >= 0x80000008 &&
diff --git a/utils/helpers/helpers.h b/utils/helpers/helpers.h
index 5f61eefff5b2..e4dc44ced770 100644
--- a/utils/helpers/helpers.h
+++ b/utils/helpers/helpers.h
@@ -71,6 +71,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
 #define CPUPOWER_CAP_INTEL_IDA		0x00000040
 #define CPUPOWER_CAP_AMD_RDPRU		0x00000080
 #define CPUPOWER_CAP_AMD_HW_PSTATE	0x00000100
+#define CPUPOWER_CAP_AMD_PSTATEDEF	0x00000200
 
 #define CPUPOWER_AMD_CPBDIS		0x02000000