[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 15/17] KVM: arm64: Hide kvm_arm_pmu_available behind CONFIG_HW_PERF_EVENTS=y
Move the definition of kvm_arm_pmu_available to pmu-emul.c and, out of "necessity", hide it behind CONFIG_HW_PERF_EVENTS. Provide a stub for the key's wrapper, kvm_arm_support_pmu_v3(). Moving the key's definition out of perf.c will allow a future commit to delete perf.c entirely. Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- arch/arm64/kernel/image-vars.h | 2 ++ arch/arm64/kvm/perf.c | 2 -- arch/arm64/kvm/pmu-emul.c | 2 ++ include/kvm/arm_pmu.h | 19 ++++++++++++------- 4 files changed, 16 insertions(+), 9 deletions(-) diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h index c96a9a0043bf..7eaf1f7c4168 100644 --- a/arch/arm64/kernel/image-vars.h +++ b/arch/arm64/kernel/image-vars.h @@ -102,7 +102,9 @@ KVM_NVHE_ALIAS(__stop___kvm_ex_table); KVM_NVHE_ALIAS(kvm_arm_hyp_percpu_base); /* PMU available static key */ +#ifdef CONFIG_HW_PERF_EVENTS KVM_NVHE_ALIAS(kvm_arm_pmu_available); +#endif /* Position-independent library routines */ KVM_NVHE_ALIAS_HYP(clear_page, __pi_clear_page); diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c index 374c496a3f1d..52cfab253c65 100644 --- a/arch/arm64/kvm/perf.c +++ b/arch/arm64/kvm/perf.c @@ -11,8 +11,6 @@ #include <asm/kvm_emulate.h> -DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available); - void kvm_perf_init(void) { kvm_register_perf_callbacks(NULL); diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index a5e4bbf5e68f..3308ceefa129 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -14,6 +14,8 @@ #include <kvm/arm_pmu.h> #include <kvm/arm_vgic.h> +DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available); + static void kvm_pmu_create_perf_event(struct kvm_vcpu *vcpu, u64 select_idx); static void kvm_pmu_update_pmc_chained(struct kvm_vcpu *vcpu, u64 select_idx); static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc); diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 90f21898aad8..f9ed4c171d7b 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -13,13 +13,6 @@ #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) #define ARMV8_PMU_MAX_COUNTER_PAIRS ((ARMV8_PMU_MAX_COUNTERS + 1) >> 1) -DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available); - -static __always_inline bool kvm_arm_support_pmu_v3(void) -{ - return static_branch_likely(&kvm_arm_pmu_available); -} - #ifdef CONFIG_HW_PERF_EVENTS struct kvm_pmc { @@ -36,6 +29,13 @@ struct kvm_pmu { struct irq_work overflow_work; }; +DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available); + +static __always_inline bool kvm_arm_support_pmu_v3(void) +{ + return static_branch_likely(&kvm_arm_pmu_available); +} + #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); @@ -65,6 +65,11 @@ int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); struct kvm_pmu { }; +static inline bool kvm_arm_support_pmu_v3(void) +{ + return false; +} + #define kvm_arm_pmu_irq_initialized(v) (false) static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx) -- 2.34.0.rc0.344.g81b53c2807-goog
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