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| author | Andrew Murray <andrew.murray@arm.com> | 2019-04-09 22:22:12 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2019-04-24 17:35:30 +0300 |
| commit | eb41238cf19fda694e3a99c1f4f58bd88479a5ee (patch) | |
| tree | c96096fc7b28a5d0d5969e882a9cd39d946544b1 /arch/arm64/include/asm/kvm_host.h | |
| parent | 630a16854d2d28d13e96ff27ab43cc5caa4609fc (diff) | |
| download | linux-eb41238cf19fda694e3a99c1f4f58bd88479a5ee.tar.xz | |
arm64: KVM: Add accessors to track guest/host only counters
In order to effeciently switch events_{guest,host} perf counters at
guest entry/exit we add bitfields to kvm_cpu_context for guest and host
events as well as accessors for updating them.
A function is also provided which allows the PMU driver to determine
if a counter should start counting when it is enabled. With exclude_host,
we may only start counting when entering the guest.
Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 9ba59832b71a..655ad08edc3a 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -233,8 +233,14 @@ struct kvm_cpu_context { struct kvm_vcpu *__hyp_running_vcpu; }; +struct kvm_pmu_events { + u32 events_host; + u32 events_guest; +}; + struct kvm_host_data { struct kvm_cpu_context host_ctxt; + struct kvm_pmu_events pmu_events; }; typedef struct kvm_host_data kvm_host_data_t; @@ -572,11 +578,22 @@ void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu); +static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr) +{ + return attr->exclude_host; +} + #ifdef CONFIG_KVM /* Avoid conflicts with core headers if CONFIG_KVM=n */ static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) { return kvm_arch_vcpu_run_map_fp(vcpu); } + +void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr); +void kvm_clr_pmu_events(u32 clr); +#else +static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} +static inline void kvm_clr_pmu_events(u32 clr) {} #endif static inline void kvm_arm_vhe_guest_enter(void) |