From f12b54d7c24388886277598236b3eeea5c68eec4 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Fri, 11 Apr 2025 11:54:22 +0100 Subject: [PATCH] KVM: arm64: Repaint pmcr_n into nr_pmu_counters The pmcr_n field obviously refers to PMCR_EL0.N, but is generally used as the number of counters seen by the guest. Rename it accordingly. Suggested-by: Oliver upton Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 4 ++-- arch/arm64/kvm/pmu-emul.c | 6 +++--- arch/arm64/kvm/sys_regs.c | 4 ++-- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index e98cfe7855a62..81a0dcf56d2bf 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -359,8 +359,8 @@ struct kvm_arch { cpumask_var_t supported_cpus; - /* PMCR_EL0.N value for the guest */ - u8 pmcr_n; + /* Maximum number of counters for the guest */ + u8 nr_pmu_counters; /* Iterator for idreg debugfs */ u8 idreg_debugfs_iter; diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index a1bc10d7116a5..60b5a5e4a6c59 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -280,7 +280,7 @@ static u64 kvm_pmu_hyp_counter_mask(struct kvm_vcpu *vcpu) return 0; hpmn = SYS_FIELD_GET(MDCR_EL2, HPMN, __vcpu_sys_reg(vcpu, MDCR_EL2)); - n = vcpu->kvm->arch.pmcr_n; + n = vcpu->kvm->arch.nr_pmu_counters; /* * Programming HPMN to a value greater than PMCR_EL0.N is @@ -1032,7 +1032,7 @@ static void kvm_arm_set_pmu(struct kvm *kvm, struct arm_pmu *arm_pmu) lockdep_assert_held(&kvm->arch.config_lock); kvm->arch.arm_pmu = arm_pmu; - kvm->arch.pmcr_n = kvm_arm_pmu_get_max_counters(kvm); + kvm->arch.nr_pmu_counters = kvm_arm_pmu_get_max_counters(kvm); } /** @@ -1261,7 +1261,7 @@ u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu) { u64 pmcr = __vcpu_sys_reg(vcpu, PMCR_EL0); - return u64_replace_bits(pmcr, vcpu->kvm->arch.pmcr_n, ARMV8_PMU_PMCR_N); + return u64_replace_bits(pmcr, vcpu->kvm->arch.nr_pmu_counters, ARMV8_PMU_PMCR_N); } void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 005ad28f73068..aec7d9104cfee 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -785,7 +785,7 @@ static unsigned int pmu_visibility(const struct kvm_vcpu *vcpu, static u64 reset_pmu_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) { u64 mask = BIT(ARMV8_PMU_CYCLE_IDX); - u8 n = vcpu->kvm->arch.pmcr_n; + u8 n = vcpu->kvm->arch.nr_pmu_counters; if (n) mask |= GENMASK(n - 1, 0); @@ -1217,7 +1217,7 @@ static int set_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r, */ if (!kvm_vm_has_ran_once(kvm) && new_n <= kvm_arm_pmu_get_max_counters(kvm)) - kvm->arch.pmcr_n = new_n; + kvm->arch.nr_pmu_counters = new_n; mutex_unlock(&kvm->arch.config_lock); -- 2.50.1