In order to effeciently enable/disable guest/host only perf counters
at guest entry/exit we add bitfields to kvm_cpu_context for guest and
host only events as well as accessors for updating them.
Signed-off-by: Andrew Murray <andrew.murray@xxxxxxx>
---
arch/arm64/include/asm/kvm_host.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 1550192..b6f998b 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -203,6 +203,8 @@ struct kvm_cpu_context {
};
struct kvm_vcpu *__hyp_running_vcpu;
+ u32 events_host_only;
+ u32 events_guest_only;
};
typedef struct kvm_cpu_context kvm_cpu_context_t;
@@ -472,6 +474,24 @@ static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
{
return kvm_arch_vcpu_run_map_fp(vcpu);
}
+static inline void kvm_set_clr_host_pmu_events(u32 clr, u32 set)
+{
+ kvm_cpu_context_t *ctx = this_cpu_ptr(&kvm_host_cpu_state);
+
+ ctx->events_host_only &= ~clr;
+ ctx->events_host_only |= set;
+}
+
+static inline void kvm_set_clr_guest_pmu_events(u32 clr, u32 set)
+{
+ kvm_cpu_context_t *ctx = this_cpu_ptr(&kvm_host_cpu_state);
+
+ ctx->events_guest_only &= ~clr;
+ ctx->events_guest_only |= set;
+}
+#else
+static inline void kvm_set_clr_host_pmu_events(u32 clr, u32 set) {}
+static inline void kvm_set_clr_guest_pmu_events(u32 clr, u32 set) {}
#endif
static inline void kvm_arm_vhe_guest_enter(void)
--
2.7.4
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