From patchwork Mon Aug 2 19:28:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Upton X-Patchwork-Id: 12414639 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89EC5C4338F for ; Mon, 2 Aug 2021 19:28:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F9EA610FD for ; Mon, 2 Aug 2021 19:28:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231301AbhHBT20 (ORCPT ); Mon, 2 Aug 2021 15:28:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229729AbhHBT2Y (ORCPT ); Mon, 2 Aug 2021 15:28:24 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34DD2C06175F for ; Mon, 2 Aug 2021 12:28:15 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id w19-20020ac87e930000b029025a2609eb04so10490210qtj.17 for ; Mon, 02 Aug 2021 12:28:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=quVRBmXT16c8/+OvPaemt4sih+vYkJfmbVpHJfXSYSE=; b=JIWAzTD8mW/5i0lrePS1nmrHncrYMDBLUNta3fNF8Ym8CYZT1LUk485ozHVMBMDP3O QZrHPlUeWTuJF0oW+YnAumjLhjKHbXgy+pcl7q8c6osX3dCzZTpAjWjFcoNK9LoWBW0d Kqj87dr4gptUzqRPoLcm/S498Tbiqy2yQxKq48t2nLaQ9K9XyaXz2y+iqZVv9QEm1jPD Y5hI3hGYVSBEJzDRk15+/YPLJc2vTS5ZmzyLkBmRWgaOpuT7eps9fvzT6BBQjtHwKYON qQubl5pEdkRCv4fdLNsa0o7a8cWRy7YPFuAsNgjwl8cHNB+VLhFnxcNyWeYt8hzkt+C1 R/dw== X-Google-DKIM-Signature: v=1; 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=tIdcVqXwm3nOcEphgyxB2yjmoNB9v+uj6pE9MKu5FRDfufIDcjIpN0C6gaSqgXnnuJ 8nWgCrWouiDS+Dm8V06APYDcItaS8nGqldAeg/bca0MMQnqfg9jcsnRvamgKZA7dq9fP xZfJYMSs3Op39GRZtZtLM/U8SJkeFtZq9iyUMoFgsyNDCJQfmDGQtkujhhm/l3Q6wIPL q60LqVW4/SexWL1I9nL5RPhieUYy/CGDKCSQnQ81FFAY6Akk7AbJXZ2IKYLcJ9Jt9lQI PSia7DawPWzhFb1ISva4RV4+dkDMUfaPusinAzcvEf3MLZxWdAUkFFovg7E5yYTTgHGD uy/A== X-Gm-Message-State: AOAM532iBVZA6YC4YBK4llA5YMyPUhsu+w+YlL9pwoQI+eI9IyqlBGMG 6lDyddM4wldm/pIzmkRDosdR4B8JaYQ= X-Google-Smtp-Source: ABdhPJz1DQuSneO2f/+7Ncn9bFUKrFi6AUVYWFhFUwzGMFfXQ0w8T9ZZ7K0LwD0TDiocdSA4H4YvhPjht+k= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:a0c:e508:: with SMTP id l8mr16364594qvm.41.1627932494378; Mon, 02 Aug 2021 12:28:14 -0700 (PDT) Date: Mon, 2 Aug 2021 19:28:07 +0000 In-Reply-To: <20210802192809.1851010-1-oupton@google.com> Message-Id: <20210802192809.1851010-2-oupton@google.com> Mime-Version: 1.0 References: <20210802192809.1851010-1-oupton@google.com> X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH v3 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 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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) ==