From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Murray Subject: [PATCH v3 2/4] arm64: KVM: add accessors to track guest/host only counters Date: Thu, 22 Nov 2018 11:25:48 +0000 Message-ID: <1542885950-23816-3-git-send-email-andrew.murray@arm.com> References: <1542885950-23816-1-git-send-email-andrew.murray@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 70B634A2E4 for ; Thu, 22 Nov 2018 06:26:04 -0500 (EST) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2kGs81DWlYH7 for ; Thu, 22 Nov 2018 06:26:02 -0500 (EST) Received: from foss.arm.com (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1F3314A2EB for ; Thu, 22 Nov 2018 06:26:02 -0500 (EST) In-Reply-To: <1542885950-23816-1-git-send-email-andrew.murray@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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..4a828eb 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_clr_set_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_clr_set_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_clr_set_host_pmu_events(u32 clr, u32 set) {} +static inline void kvm_clr_set_guest_pmu_events(u32 clr, u32 set) {} #endif static inline void kvm_arm_vhe_guest_enter(void) -- 2.7.4