From: Andrew Murray <andrew.murray@arm.com> To: Christoffer Dall <christoffer.dall@arm.com>, Marc Zyngier <marc.zyngier@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com> Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 3/5] arm64: KVM: add accessors to track guest/host only counters Date: Tue, 11 Dec 2018 12:13:38 +0000 [thread overview] Message-ID: <1544530420-1477-4-git-send-email-andrew.murray@arm.com> (raw) In-Reply-To: <1544530420-1477-1-git-send-email-andrew.murray@arm.com> 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 events as well as accessors for updating them. Signed-off-by: Andrew Murray <andrew.murray@arm.com> --- arch/arm64/include/asm/kvm_host.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index bcf9d60..8c0c694 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -205,8 +205,14 @@ 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 __kvm_cpu_state; + struct kvm_pmu_events pmu_events; }; typedef struct kvm_host_data kvm_cpu_context_t; @@ -471,11 +477,33 @@ 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); +#define KVM_PMU_EVENTS_HOST 1 +#define KVM_PMU_EVENTS_GUEST 2 + #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); } +static inline void kvm_set_pmu_events(u32 set, int flags) +{ + struct kvm_host_data *ctx = this_cpu_ptr(&kvm_host_cpu_state); + + if (flags & KVM_PMU_EVENTS_HOST) + ctx->pmu_events.events_host |= set; + if (flags & KVM_PMU_EVENTS_GUEST) + ctx->pmu_events.events_guest |= set; +} +static inline void kvm_clr_pmu_events(u32 clr) +{ + struct kvm_host_data *ctx = this_cpu_ptr(&kvm_host_cpu_state); + + ctx->pmu_events.events_host &= ~clr; + ctx->pmu_events.events_guest &= ~clr; +} +#else +static inline void kvm_set_pmu_events(u32 set, int flags) {} +static inline void kvm_clr_pmu_events(u32 clr) {} #endif static inline void kvm_arm_vhe_guest_enter(void) -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Murray <andrew.murray@arm.com> To: Christoffer Dall <christoffer.dall@arm.com>, Marc Zyngier <marc.zyngier@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Julien Thierry <julien.thierry@arm.com> Subject: [PATCH v7 3/5] arm64: KVM: add accessors to track guest/host only counters Date: Tue, 11 Dec 2018 12:13:38 +0000 [thread overview] Message-ID: <1544530420-1477-4-git-send-email-andrew.murray@arm.com> (raw) In-Reply-To: <1544530420-1477-1-git-send-email-andrew.murray@arm.com> 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 events as well as accessors for updating them. Signed-off-by: Andrew Murray <andrew.murray@arm.com> --- arch/arm64/include/asm/kvm_host.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index bcf9d60..8c0c694 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -205,8 +205,14 @@ 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 __kvm_cpu_state; + struct kvm_pmu_events pmu_events; }; typedef struct kvm_host_data kvm_cpu_context_t; @@ -471,11 +477,33 @@ 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); +#define KVM_PMU_EVENTS_HOST 1 +#define KVM_PMU_EVENTS_GUEST 2 + #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); } +static inline void kvm_set_pmu_events(u32 set, int flags) +{ + struct kvm_host_data *ctx = this_cpu_ptr(&kvm_host_cpu_state); + + if (flags & KVM_PMU_EVENTS_HOST) + ctx->pmu_events.events_host |= set; + if (flags & KVM_PMU_EVENTS_GUEST) + ctx->pmu_events.events_guest |= set; +} +static inline void kvm_clr_pmu_events(u32 clr) +{ + struct kvm_host_data *ctx = this_cpu_ptr(&kvm_host_cpu_state); + + ctx->pmu_events.events_host &= ~clr; + ctx->pmu_events.events_guest &= ~clr; +} +#else +static inline void kvm_set_pmu_events(u32 set, int flags) {} +static inline void kvm_clr_pmu_events(u32 clr) {} #endif static inline void kvm_arm_vhe_guest_enter(void) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2018-12-11 12:14 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-12-11 12:13 [PATCH v7 0/5] arm64: Support perf event modifiers :G and :H Andrew Murray 2018-12-11 12:13 ` Andrew Murray 2018-12-11 12:13 ` [PATCH v7 1/5] arm64: arm_pmu: remove unnecessary isb instruction Andrew Murray 2018-12-11 12:13 ` Andrew Murray 2018-12-11 12:13 ` [PATCH v7 2/5] arm64: KVM: encapsulate kvm_cpu_context in kvm_host_data Andrew Murray 2018-12-11 12:13 ` Andrew Murray 2018-12-11 12:29 ` Christoffer Dall 2018-12-11 12:29 ` Christoffer Dall 2018-12-11 13:11 ` Andrew Murray 2018-12-11 13:11 ` Andrew Murray 2018-12-11 13:40 ` Christoffer Dall 2018-12-11 13:40 ` Christoffer Dall 2018-12-11 14:00 ` Andrew Murray 2018-12-11 14:00 ` Andrew Murray 2018-12-11 12:40 ` Suzuki K Poulose 2018-12-11 12:40 ` Suzuki K Poulose 2018-12-11 13:11 ` Andrew Murray 2018-12-11 13:11 ` Andrew Murray 2018-12-11 12:13 ` Andrew Murray [this message] 2018-12-11 12:13 ` [PATCH v7 3/5] arm64: KVM: add accessors to track guest/host only counters Andrew Murray 2018-12-11 12:13 ` [PATCH v7 4/5] arm64: arm_pmu: Add support for exclude_host/exclude_guest attributes Andrew Murray 2018-12-11 12:13 ` Andrew Murray 2018-12-11 12:13 ` [PATCH v7 5/5] arm64: KVM: Enable support for :G/:H perf event modifiers Andrew Murray 2018-12-11 12:13 ` Andrew Murray
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