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