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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 5DF41C43381 for ; Fri, 8 Jan 2021 01:46:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 416A923380 for ; Fri, 8 Jan 2021 01:46:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729896AbhAHBqK (ORCPT ); Thu, 7 Jan 2021 20:46:10 -0500 Received: from mga09.intel.com ([134.134.136.24]:27993 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729466AbhAHBqJ (ORCPT ); Thu, 7 Jan 2021 20:46:09 -0500 IronPort-SDR: uqKyTDYG1Wp+69dKGRWoK5v5J5xHl/BBU88mjMYrLSim1bNMewFPQoVLvY0sFew/sNUAacTV0S 82OB5aggkO/A== X-IronPort-AV: E=McAfee;i="6000,8403,9857"; a="177672386" X-IronPort-AV: E=Sophos;i="5.79,330,1602572400"; d="scan'208";a="177672386" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jan 2021 17:43:14 -0800 IronPort-SDR: r3Lu4qp+eMJ0PLLfj1cPpDKLwA5CNbEcWqoA5qIWR3zv8MupfN0FsGYGz3t594mzbE5pDY31E3 Bgjt04ANwfpQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,330,1602572400"; d="scan'208";a="379938048" Received: from clx-ap-likexu.sh.intel.com ([10.239.48.108]) by orsmga008.jf.intel.com with ESMTP; 07 Jan 2021 17:43:10 -0800 From: Like Xu To: Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel Cc: Ingo Molnar , Thomas Gleixner , Borislav Petkov , "H . Peter Anvin" , ak@linux.intel.com, wei.w.wang@intel.com, kan.liang@intel.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RESEND v13 03/10] KVM: x86/pmu: Use IA32_PERF_CAPABILITIES to adjust features visibility Date: Fri, 8 Jan 2021 09:36:57 +0800 Message-Id: <20210108013704.134985-4-like.xu@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210108013704.134985-1-like.xu@linux.intel.com> References: <20210108013704.134985-1-like.xu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Intel platforms, KVM agent could configure MSR_IA32_PERF_CAPABILITIES (such as unmask some vmx-supported bits in vcpu->arch.perf_capabilities) to adjust the visibility of guest PMU features for vPMU-enabled guests. Once MSR_IA32_PERF_CAPABILITIES is changed via vmx_set_msr() validly, the adjustment in intel_pmu_refresh() will be triggered. To ensure the sustainability of the new value, the default initialization path is moved to intel_pmu_init(). Signed-off-by: Like Xu Reviewed-by: Andi Kleen --- arch/x86/kvm/vmx/pmu_intel.c | 6 +++--- arch/x86/kvm/vmx/vmx.c | 5 +++++ arch/x86/kvm/x86.c | 2 +- 3 files changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index a886a47daebd..f8083ecf8c7b 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -327,7 +327,6 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu) pmu->counter_bitmask[KVM_PMC_FIXED] = 0; pmu->version = 0; pmu->reserved_bits = 0xffffffff00200000ull; - vcpu->arch.perf_capabilities = 0; entry = kvm_find_cpuid_entry(vcpu, 0xa, 0); if (!entry) @@ -340,8 +339,6 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu) return; perf_get_x86_pmu_capability(&x86_pmu); - if (guest_cpuid_has(vcpu, X86_FEATURE_PDCM)) - vcpu->arch.perf_capabilities = vmx_get_perf_capabilities(); pmu->nr_arch_gp_counters = min_t(int, eax.split.num_counters, x86_pmu.num_counters_gp); @@ -401,6 +398,9 @@ static void intel_pmu_init(struct kvm_vcpu *vcpu) pmu->fixed_counters[i].idx = i + INTEL_PMC_IDX_FIXED; pmu->fixed_counters[i].current_config = 0; } + + vcpu->arch.perf_capabilities = guest_cpuid_has(vcpu, X86_FEATURE_PDCM) ? + vmx_get_perf_capabilities() : 0; } static void intel_pmu_reset(struct kvm_vcpu *vcpu) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 035bd6d279a4..085a14579bbe 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2209,6 +2209,11 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) if ((data >> 32) != 0) return 1; goto find_uret_msr; + case MSR_IA32_PERF_CAPABILITIES: + if (data && !vcpu_to_pmu(vcpu)->version) + return 1; + ret = kvm_set_msr_common(vcpu, msr_info); + break; default: find_uret_msr: diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c765fd72a66c..a1b251ae648a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3037,7 +3037,7 @@ 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: -- 2.29.2