From 96b0eebcc6a14e3bdb9ff0e7176fbfc225bdde94 Mon Sep 17 00:00:00 2001 From: Shannon Zhao Date: Tue, 8 Sep 2015 12:26:13 +0800 Subject: arm64: KVM: Add access handler for PMCNTENSET and PMCNTENCLR register Since the reset value of PMCNTENSET and PMCNTENCLR is UNKNOWN, use reset_unknown for its reset handler. Add a handler to emulate writing PMCNTENSET or PMCNTENCLR register. When writing to PMCNTENSET, call perf_event_enable to enable the perf event. When writing to PMCNTENCLR, call perf_event_disable to disable the perf event. Signed-off-by: Shannon Zhao Signed-off-by: Marc Zyngier --- include/kvm/arm_pmu.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/kvm') diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index bcb769805839..b70058ef1dd6 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -40,6 +40,9 @@ struct kvm_pmu { #define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready) 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); +u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); +void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val); +void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val); #else struct kvm_pmu { }; @@ -52,6 +55,12 @@ static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, } static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val) {} +static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) +{ + return 0; +} +static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {} +static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {} #endif #endif -- cgit v1.2.3