From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Murray Subject: [PATCH 1/4] arm64: KVM: add accessors to track guest/host only counters Date: Thu, 15 Nov 2018 12:55:46 +0000 Message-ID: <1542286549-4501-2-git-send-email-andrew.murray@arm.com> References: <1542286549-4501-1-git-send-email-andrew.murray@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1542286549-4501-1-git-send-email-andrew.murray@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Christoffer Dall , Marc Zyngier , Catalin Marinas , Will Deacon , Mark Rutland Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org List-Id: kvmarm@lists.cs.columbia.edu 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 --- 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