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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F01DC19F2C for ; Wed, 27 Jul 2022 23:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233590AbiG0Xei (ORCPT ); Wed, 27 Jul 2022 19:34:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232904AbiG0Xee (ORCPT ); Wed, 27 Jul 2022 19:34:34 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E838C56B9D for ; Wed, 27 Jul 2022 16:34:33 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id s6-20020a170902a50600b0016d2e77252eso174820plq.18 for ; Wed, 27 Jul 2022 16:34:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=tcg4fyWcMhApmssB1rrZxLEKjBF7sSie1JOHuz2QyKw=; b=Y22uyc7My63H8qiFF1kgEwUBLMnNiTDQAspI9xMCMaI8CL4pMsFZwEy5qqqu/OAbjk dCkhYEVY81t7juGyB3KIxXTQ16K2PW8Lbb0TiJluF1RHfns+Gpb4V79FfA53W3Jo94he OhcXVYyDhnTAEAhhX4NcAbrMDp1GYhjOIRVOBGVk99IfkIzYylefYMyoW1sFSV14LpXR /loGYZXkjgZj34YAUF1U+FsjpNVxIp22oA9ihhclEeuBB1IqhuA/NrFqXW3aYoCx0I57 74hrMCbtPcUJHybQ8N6HeVjtcLXTs1aNHY455CaZL+xFrrAx8aGJU+hv7v53sWhV6ZIR zeaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=tcg4fyWcMhApmssB1rrZxLEKjBF7sSie1JOHuz2QyKw=; b=ZVVVEIXEwIT0wPEEVLh2sYNwiK7p/V7ABD54cy2Hthfr7Cfq7iATSJjT8WaErAnRTJ cQlqQ9o3KjeyJrmVwouH3LbPMfP/rMSbIKf72GfuRS+34w69zIw732i9opXMvB56afCg amVeMRoJDWO4VA1FtBEJS3FBoKi/x/6k1XHEHd72Ms4rBdb0G23sfn0Mrv6iIaxsRifj rP/jGNQ7drlKBfliMb6J0KXv5fWdGJlcmxWiDg5JCGLkRKfYoE6/tXtsYUKSCnYPc4lg F89pbAV+Tp+WV+hsX4BzQ1ezTsFGhntoCjZ7QqKcgR9VvVFeEwnui/okqr0IneetJXkb ToYQ== X-Gm-Message-State: AJIora+piEwL+PekxXlkqkMavd0yhM+uOAMdyTguuCcoqRPV8n9VDCQn AghoO6pSzojFZxKypd6gJ5yJzd+0ZLs= X-Google-Smtp-Source: AGRyM1v9kW5QkJ7txPbJ2wbBnmnKx7n0zh8SlRr9e8pUg1+T0qGL/PY7sqMWVgiX+DZcxx9VtWqNPiGmxJI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:aa7:9e9b:0:b0:528:2948:e974 with SMTP id p27-20020aa79e9b000000b005282948e974mr24092040pfq.79.1658964873498; Wed, 27 Jul 2022 16:34:33 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 27 Jul 2022 23:34:22 +0000 In-Reply-To: <20220727233424.2968356-1-seanjc@google.com> Message-Id: <20220727233424.2968356-2-seanjc@google.com> Mime-Version: 1.0 References: <20220727233424.2968356-1-seanjc@google.com> X-Mailer: git-send-email 2.37.1.359.gd136c6c3e2-goog Subject: [PATCH 1/3] KVM: x86: Refresh PMU after writes to MSR_IA32_PERF_CAPABILITIES From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Like Xu Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Refresh the PMU if userspace modifies MSR_IA32_PERF_CAPABILITIES. KVM consumes the vCPU's PERF_CAPABILITIES when enumerating PEBS support, but relies on CPUID updates to refresh the PMU. I.e. KVM will do the wrong thing if userspace stuffs PERF_CAPABILITIES _after_ setting guest CPUID. Opportunistically fix a curly-brace indentation. Fixes: c59a1f106f5c ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS") Cc: Like Xu Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 5366f884e9a7..362c538285db 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3543,9 +3543,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return 1; vcpu->arch.perf_capabilities = data; - + kvm_pmu_refresh(vcpu); return 0; - } + } case MSR_EFER: return set_efer(vcpu, msr_info); case MSR_K7_HWCR: -- 2.37.1.359.gd136c6c3e2-goog