arm64/sysreg: Use feature numbering for PMU and SPE revisions

Currently the kernel refers to the versions of the PMU and SPE features by
the version of the architecture where those features were updated but the
ARM refers to them using the FEAT_ names for the features. To improve
consistency and help with updating for newer features and since v9 will
make our current naming scheme a bit more confusing update the macros
identfying features to use the FEAT_ based scheme.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220910163354.860255-4-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/include/asm/sysreg.h

@@ -711,15 +711,15 @@
 #define ID_AA64DFR0_EL1_TraceVer_SHIFT		4
 #define ID_AA64DFR0_EL1_DebugVer_SHIFT		0
 
-#define ID_AA64DFR0_EL1_PMUVer_8_0		0x1
-#define ID_AA64DFR0_EL1_PMUVer_8_1		0x4
-#define ID_AA64DFR0_EL1_PMUVer_8_4		0x5
-#define ID_AA64DFR0_EL1_PMUVer_8_5		0x6
-#define ID_AA64DFR0_EL1_PMUVer_8_7		0x7
+#define ID_AA64DFR0_EL1_PMUVer_IMP		0x1
+#define ID_AA64DFR0_EL1_PMUVer_V3P1		0x4
+#define ID_AA64DFR0_EL1_PMUVer_V3P4		0x5
+#define ID_AA64DFR0_EL1_PMUVer_V3P5		0x6
+#define ID_AA64DFR0_EL1_PMUVer_V3P7		0x7
 #define ID_AA64DFR0_EL1_PMUVer_IMP_DEF		0xf
 
-#define ID_AA64DFR0_EL1_PMSVer_8_2		0x1
-#define ID_AA64DFR0_EL1_PMSVer_8_3		0x2
+#define ID_AA64DFR0_EL1_PMSVer_IMP		0x1
+#define ID_AA64DFR0_EL1_PMSVer_V1P1		0x2
 
 #define ID_DFR0_PERFMON_SHIFT		24
 

arch/arm64/kernel/perf_event.c

@@ -390,7 +390,7 @@ static const struct attribute_group armv8_pmuv3_caps_attr_group = {
  */
 static bool armv8pmu_has_long_event(struct arm_pmu *cpu_pmu)
 {
-	return (cpu_pmu->pmuver >= ID_AA64DFR0_EL1_PMUVer_8_5);
+	return (cpu_pmu->pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P5);
 }
 
 static inline bool armv8pmu_event_has_user_read(struct perf_event *event)
@@ -1172,7 +1172,7 @@ static void __armv8pmu_probe_pmu(void *info)
 			     pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS);
 
 	/* store PMMIR_EL1 register for sysfs */
-	if (pmuver >= ID_AA64DFR0_EL1_PMUVer_8_4 && (pmceid_raw[1] & BIT(31)))
+	if (pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P4 && (pmceid_raw[1] & BIT(31)))
 		cpu_pmu->reg_pmmir = read_cpuid(PMMIR_EL1);
 	else
 		cpu_pmu->reg_pmmir = 0;

arch/arm64/kvm/pmu-emul.c

@@ -33,12 +33,12 @@ static u32 kvm_pmu_event_mask(struct kvm *kvm)
 	pmuver = kvm->arch.arm_pmu->pmuver;
 
 	switch (pmuver) {
-	case ID_AA64DFR0_EL1_PMUVer_8_0:
+	case ID_AA64DFR0_EL1_PMUVer_IMP:
 		return GENMASK(9, 0);
-	case ID_AA64DFR0_EL1_PMUVer_8_1:
-	case ID_AA64DFR0_EL1_PMUVer_8_4:
-	case ID_AA64DFR0_EL1_PMUVer_8_5:
-	case ID_AA64DFR0_EL1_PMUVer_8_7:
+	case ID_AA64DFR0_EL1_PMUVer_V3P1:
+	case ID_AA64DFR0_EL1_PMUVer_V3P4:
+	case ID_AA64DFR0_EL1_PMUVer_V3P5:
+	case ID_AA64DFR0_EL1_PMUVer_V3P7:
 		return GENMASK(15, 0);
 	default:		/* Shouldn't be here, just for sanity */
 		WARN_ONCE(1, "Unknown PMU version %d\n", pmuver);
@@ -856,7 +856,7 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
 		 * Don't advertise STALL_SLOT, as PMMIR_EL0 is handled
 		 * as RAZ
 		 */
-		if (vcpu->kvm->arch.arm_pmu->pmuver >= ID_AA64DFR0_EL1_PMUVer_8_4)
+		if (vcpu->kvm->arch.arm_pmu->pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P4)
 			val &= ~BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT - 32);
 		base = 32;
 	}

arch/arm64/kvm/sys_regs.c

@@ -1115,7 +1115,7 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu,
 		/* Limit guests to PMUv3 for ARMv8.4 */
 		val = cpuid_feature_cap_perfmon_field(val,
 						      ID_AA64DFR0_EL1_PMUVer_SHIFT,
-						      kvm_vcpu_has_pmu(vcpu) ? ID_AA64DFR0_EL1_PMUVer_8_4 : 0);
+						      kvm_vcpu_has_pmu(vcpu) ? ID_AA64DFR0_EL1_PMUVer_V3P4 : 0);
 		/* Hide SPE from guests */
 		val &= ~ARM64_FEATURE_MASK(ID_AA64DFR0_EL1_PMSVer);
 		break;