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 F028BC4338F for ; Thu, 29 Jul 2021 19:56:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DA5B360F01 for ; Thu, 29 Jul 2021 19:56:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232710AbhG2T4w (ORCPT ); Thu, 29 Jul 2021 15:56:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232529AbhG2T4s (ORCPT ); Thu, 29 Jul 2021 15:56:48 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBB5DC0613C1 for ; Thu, 29 Jul 2021 12:56:44 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id f3-20020a25cf030000b029055a2303fc2dso7850561ybg.11 for ; Thu, 29 Jul 2021 12:56:44 -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=pgN08b/yk00GBllZokVtpDSIFyPI7a31tDiORmsCfCE=; b=YYy23uG1UwrvJN92781dawTqDn7rZMmOuoeD+4Fa5cMOURrHKF4+7b+PbMfknbbdxA gAO0wbzpUDvMB/7yIdtwvwc5NMSXTrutcgwm4KEhR8VtONe2DahfE+BQsbia6PESTKca 0+xIPncJvhoGX1fBAjyBzaTX/3YpdeWuQTVe/qzrGc1zEJV/3vyTEgzpd5gTGq0vXQEm LeylFxvvkaMHXaRdAiuuEjB2TqJ5zZ2ew7iYg9KMiHHP25U1dRuUvOY07cskE37oe/XJ DRTHHBc88F/Vh8xcmrroJWrPOD9C13B3s6UPhD860jT69w1S70hx2aht/1RR8+d6xe5w Vv0Q== 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=pgN08b/yk00GBllZokVtpDSIFyPI7a31tDiORmsCfCE=; b=YOhQ6rtZV/y5JKA5Y1JG5bnhh4jTdMgbU+XuenqZJOCE7HRUXqFuiG9pRWeieukFtP E8PST4nXZ2Mck5RHR01a6Gi+xh4dAVRn16y72EDqxxYCsGrUjMPg/L/s8LL0ubrv/ZdF A7fUIISEtpXVuIXY9WEbQCR2qLdJxF07KTQoJCBEw/R6HS3Ocs8ZT1Zw7nfSL7jy01JJ mP6FHG7PWanTUk/3SQrmNXWJQyS4znroF0HnzZmXAz/77BKjJISFm/nPqX69fGDKeCD/ JOugdbhfRVsL5k1RQxFqHorkJ0hiU6Lv64yZx662ONdzDSNBz0635MWMWHWeePtDa1t3 hqcg== X-Gm-Message-State: AOAM532D7e4ISYHxHCWZReR/6jas29C1vCudbjyhp1HKJalu5rL0n4bx Q2Adt9Av+wH3eQuCZp02dgDzaMGIlNs= X-Google-Smtp-Source: ABdhPJxv5Q9iSjza/dtoJWD8Ji6uBJa+KRn2GwxkRTQBooW5PwZGIYhH1qvOF/ZaptJAN9C14jeegk4SH7g= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:a25:7a03:: with SMTP id v3mr9033669ybc.202.1627588604139; Thu, 29 Jul 2021 12:56:44 -0700 (PDT) Date: Thu, 29 Jul 2021 19:56:30 +0000 In-Reply-To: <20210729195632.489978-1-oupton@google.com> Message-Id: <20210729195632.489978-2-oupton@google.com> Mime-Version: 1.0 References: <20210729195632.489978-1-oupton@google.com> X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH 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. Cc: 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 | 3 ++- 3 files changed, 4 insertions(+), 1 deletion(-) 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..50fc16ad872f 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -50,7 +50,8 @@ 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, exits) + STATS_DESC_COUNTER(VCPU, exits), + STATS_DESC_COUNTER(VCPU, signal_exits), }; static_assert(ARRAY_SIZE(kvm_vcpu_stats_desc) == sizeof(struct kvm_vcpu_stat) / sizeof(u64)); -- 2.32.0.554.ge1b32706d8-goog