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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=quVRBmXT16c8/+OvPaemt4sih+vYkJfmbVpHJfXSYSE=; b=c2d9rbZkhY7yWEx+lQrwmXh2F17dev4kUa37ONBOucZjxyjBflK7mO9eXu/4OzK6W+ YxQk2ecNHoFDqj7JPAhMgf6MXTEvxPO54zfTX3+EGJ+mtIcmPDHxLX5iH5IT+OtWNgIM 4KKZadF+8nF7tWvH4Bc5cdAOD9XbFHZk3OjZeHg9fjAckU9txZDXVEVOxlNZZWSfDEWp jcW012VWWEQlwPntyVZGJIo+oDYPGJiphTaDYQhuZSSjHrt42BGn8hXZOoNMmlJdFgT5 rLwgB3i+lGs3zLp2QdSn+q18UFAffIjArl958arUo9GeBqF8kSu/a/hBHj0rcpZLxUY7 sgVw== X-Gm-Message-State: AOAM530+SO4hmASZXhWCueaPH4IzZS0PU1GFHg7Ors0GkY++4af2Ildk M6pornAFT09Juw3WTivp7v0JIm31+VQ= X-Google-Smtp-Source: ABdhPJzcet3LHyvZdP4E+QC8YrDCMndlQCo3ftaMJDpvwe0sicb30CgU1kH3S2MUtZSb4XXEKENrpPs4SFs= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:aca:bf84:: with SMTP id p126mr4508603oif.154.1627596566328; Thu, 29 Jul 2021 15:09:26 -0700 (PDT) Date: Thu, 29 Jul 2021 22:09:14 +0000 In-Reply-To: <20210729220916.1672875-1-oupton@google.com> Message-Id: <20210729220916.1672875-2-oupton@google.com> Mime-Version: 1.0 References: <20210729220916.1672875-1-oupton@google.com> X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH v2 1/3] KVM: arm64: Record number of signal exits as a vCPU stat From: Oliver Upton To: kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Thomas Gleixner , Peter Zijlstra , Andy Lutomirski , linux-arm-kernel@lists.infradead.org, Peter Shier , Shakeel Butt , Guangyu Shi , Oliver Upton , Jing Zhang X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210729_150929_954809_FCAA82A5 X-CRM114-Status: GOOD ( 11.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Most other architectures that implement KVM record a statistic indicating the number of times a vCPU has exited due to a pending signal. Add support for that stat to arm64. Reviewed-by: Jing Zhang Signed-off-by: Oliver Upton --- arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/arm.c | 1 + arch/arm64/kvm/guest.c | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 41911585ae0c..70e129f2b574 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -576,6 +576,7 @@ struct kvm_vcpu_stat { u64 wfi_exit_stat; u64 mmio_exit_user; u64 mmio_exit_kernel; + u64 signal_exits; u64 exits; }; diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index e9a2b8f27792..60d0a546d7fd 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -783,6 +783,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) if (signal_pending(current)) { ret = -EINTR; run->exit_reason = KVM_EXIT_INTR; + ++vcpu->stat.signal_exits; } /* diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 1dfb83578277..853d1e8d2e73 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -50,6 +50,7 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { STATS_DESC_COUNTER(VCPU, wfi_exit_stat), STATS_DESC_COUNTER(VCPU, mmio_exit_user), STATS_DESC_COUNTER(VCPU, mmio_exit_kernel), + STATS_DESC_COUNTER(VCPU, signal_exits), STATS_DESC_COUNTER(VCPU, exits) }; static_assert(ARRAY_SIZE(kvm_vcpu_stats_desc) ==