From mboxrd@z Thu Jan 1 00:00:00 1970 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=unavailable 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 DAA52C4338F for ; Thu, 29 Jul 2021 22:09:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCF6760EB5 for ; Thu, 29 Jul 2021 22:09:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234561AbhG2WJi (ORCPT ); Thu, 29 Jul 2021 18:09:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234299AbhG2WJa (ORCPT ); Thu, 29 Jul 2021 18:09:30 -0400 Received: from mail-oo1-xc49.google.com (mail-oo1-xc49.google.com [IPv6:2607:f8b0:4864:20::c49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18B6EC0613C1 for ; Thu, 29 Jul 2021 15:09:27 -0700 (PDT) Received: by mail-oo1-xc49.google.com with SMTP id b7-20020a0568200247b02902691c6a5defso3093095ooe.15 for ; Thu, 29 Jul 2021 15:09:27 -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=ugW9I6GN7pWL34ADNzvmolXeBcl8BcWkp42bUMTI1HufksQY7hkq6QIre1ssegbcDK 1HingL2dULatPpmnK4uTzlDTe5eHq4aIvslbmDd+0FZDk9o/YhXmqlRUHTKClJqtjIRx lO9lAb7lc0X/0//6WYsoJanHg5bq1N/NKju+D9SXdR0TnkG7bI2ZtwBRiaEWf6bOkRAb 98/5vkebBq7V5Nz4THlbYao4dA+pzlZ/gHl/QwtbvjtosU+04rXIX/8S9Log9/7k7tkG h+Dzno/lXwqxLsTSydVwT48EpccvW4FnKhbvPPd1heziD9Z5v6dkZjVLzssvROFfgMNZ 1Y1Q== 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=kYW2WyR8FJV9wuEgVjyyRTw1qpCIIxdBlNs4q4llFN8akDMQ1xf2tDh2KraCSC+P8k 2TVo6Hd5Iacmp7S5fgqMVIsOTbHOgnRyIQYqNhCP/QYvKc14CtLcp+McJ/P9NRYGPGF9 a5twAUDNpeC6fGQ/YePmHR3bGa/qqB8265DqnEWURA+CIoPw+TWhb63FAy2vvpcaJL2s GMkffOQ/w15aCDGdqx1i5Iwu+7wtXKoOUkQNjlPga0DeeB201bgbLxq1mbJM4R8B/CTG MTkiHTl4iGcjeMasNfy2BIJ2WG2OY5TmWQZkpxMoFEY3tl7mJOuxNMQDdXFbm8LMc7uR I3gg== X-Gm-Message-State: AOAM532wcVDxIq7+1wvr/FaoM5YGRYQXHDTKaU8P6bkVpRWc9pK084ay WRmPWazqLz5jFnKgHNvvYIDXKJfZs+g= 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 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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) == -- 2.32.0.554.ge1b32706d8-goog From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.6 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 952D4C4320E for ; Thu, 29 Jul 2021 22:09:31 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 328B660F4B for ; Thu, 29 Jul 2021 22:09:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 328B660F4B Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C62C14B0B9; Thu, 29 Jul 2021 18:09:30 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com 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 6fTDZfYc-TSv; Thu, 29 Jul 2021 18:09:29 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id AEF454B0DA; Thu, 29 Jul 2021 18:09:29 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1F7BD4B0D3 for ; Thu, 29 Jul 2021 18:09:28 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu 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 S9my36gpvQZ6 for ; Thu, 29 Jul 2021 18:09:27 -0400 (EDT) Received: from mail-oi1-f201.google.com (mail-oi1-f201.google.com [209.85.167.201]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 30FCD4B0D2 for ; Thu, 29 Jul 2021 18:09:27 -0400 (EDT) Received: by mail-oi1-f201.google.com with SMTP id m20-20020a0568080f14b029025a3cb2429bso3631653oiw.20 for ; Thu, 29 Jul 2021 15:09:27 -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=ugW9I6GN7pWL34ADNzvmolXeBcl8BcWkp42bUMTI1HufksQY7hkq6QIre1ssegbcDK 1HingL2dULatPpmnK4uTzlDTe5eHq4aIvslbmDd+0FZDk9o/YhXmqlRUHTKClJqtjIRx lO9lAb7lc0X/0//6WYsoJanHg5bq1N/NKju+D9SXdR0TnkG7bI2ZtwBRiaEWf6bOkRAb 98/5vkebBq7V5Nz4THlbYao4dA+pzlZ/gHl/QwtbvjtosU+04rXIX/8S9Log9/7k7tkG h+Dzno/lXwqxLsTSydVwT48EpccvW4FnKhbvPPd1heziD9Z5v6dkZjVLzssvROFfgMNZ 1Y1Q== 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=JvW6kNOGDhUU7miWT2OYNHyAjutxlFffRZwaezBe9O5GuUFbhsnzL+H3BvZO9Tvl0A foG6RskuKGwZo7KR61HkcLlvBeTm5sIt6fglmwIjSSvzoWiuhcyxqE+BHEoRx/Sd+ohW WM8JIKoSm7p5ynAROaoZHzijdo0nXcx6Mg8WumW/zZEWIqO/kU4/6EFfgAQezcU/DlVy aN+htfDF4jUJNOyywaKroEfjmHe2VcoKQgLvlqMCuo20EZLsYF5zLIzNV+c6hz0D7gMm 6FrQAwWHCpGrTgu8nr+PgimcAXmdNIHb7N39MVn9fpelOEj4AC4DKVXFHrET+3mrHncw MvLA== X-Gm-Message-State: AOAM532AnR1OmqRcmy7xo/0HZ9/+Yr99wf7z7eJXvk8k19kHccF02+9k +jPnGwBV3rP2FtFjqLxa/iCSFa3iBLczMQ4sWB2hF1gbZ4454cxSY/u+7hkRF1AEzOoyEE54YyL m7f/ypE7pBCoaqPGZfR9nC50PgMfEkxhqt47oK6exbAe52dFoMNphco+8xXd2klM+Q96WWw== 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: Shakeel Butt , kvm@vger.kernel.org, Peter Zijlstra , Marc Zyngier , Peter Shier , linux-kernel@vger.kernel.org, Guangyu Shi , Will Deacon , Andy Lutomirski , Catalin Marinas , Paolo Bonzini , Thomas Gleixner , linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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) == -- 2.32.0.554.ge1b32706d8-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 6EEFBC4338F for ; Thu, 29 Jul 2021 22:11:49 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3C2DC604DB for ; Thu, 29 Jul 2021 22:11:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3C2DC604DB Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:References: Mime-Version:Message-Id:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=sRibo6ux+5qn/kY2pjm72NRBI/jrfOI/7AjTR9csb8Q=; b=isoD2MHCUarz3HdaptHTSeHwR+ CFdIqxTCHuFlhrKLBq5vIYlQG3/2nw5E1XJ2jyzF8XzHrkrOaLkKmsvSNGGrEkTsumQjiBQRTKVI0 F8VGItMANgJor9gIB86PS57zfCpCoHMT3J+s3oO9T/cbGZyLWSJ/PoFCNy326Z8R/AI6XPRB0m8AR oFN4DIMpxNyKXe9hGmjeczEmDbWfGS6lBzF/CFUtAIxKTH1URrkLMKZAbWx4ovFIkNpPxMoSKHwQb FZbKKZ8FFXyrwEY2TpIpveWl/C5Afdzx+kPvK5qfQ8zUmVnah4P9gbxBwnxLgnbuqEGSeStiGhDRZ 7JJETNWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m9EDo-006BPC-Pc; Thu, 29 Jul 2021 22:09:44 +0000 Received: from mail-oi1-x24a.google.com ([2607:f8b0:4864:20::24a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m9EDZ-006BKn-Qs for linux-arm-kernel@lists.infradead.org; Thu, 29 Jul 2021 22:09:31 +0000 Received: by mail-oi1-x24a.google.com with SMTP id o5-20020a0568080bc5b029025cbda427bbso3670359oik.5 for ; Thu, 29 Jul 2021 15:09:27 -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=ugW9I6GN7pWL34ADNzvmolXeBcl8BcWkp42bUMTI1HufksQY7hkq6QIre1ssegbcDK 1HingL2dULatPpmnK4uTzlDTe5eHq4aIvslbmDd+0FZDk9o/YhXmqlRUHTKClJqtjIRx lO9lAb7lc0X/0//6WYsoJanHg5bq1N/NKju+D9SXdR0TnkG7bI2ZtwBRiaEWf6bOkRAb 98/5vkebBq7V5Nz4THlbYao4dA+pzlZ/gHl/QwtbvjtosU+04rXIX/8S9Log9/7k7tkG h+Dzno/lXwqxLsTSydVwT48EpccvW4FnKhbvPPd1heziD9Z5v6dkZjVLzssvROFfgMNZ 1Y1Q== 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=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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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) == -- 2.32.0.554.ge1b32706d8-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel