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 D10D9C3F6B0 for ; Wed, 27 Jul 2022 23:34:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233000AbiG0Xef (ORCPT ); Wed, 27 Jul 2022 19:34:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229532AbiG0Xed (ORCPT ); Wed, 27 Jul 2022 19:34:33 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE6AE564E4 for ; Wed, 27 Jul 2022 16:34:32 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id v19-20020a252f13000000b0067174f085e9so366169ybv.1 for ; Wed, 27 Jul 2022 16:34:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:message-id:mime-version:subject:from:to:cc; bh=L3m2JC5GapMYqTiLfpgpy+Syxp+egGM8zqBmpln74FQ=; b=QvTYidN+KmLvcyrB45xodWUwi/AdeLijHMBx02iEklp/7wl57m7u637uhOrULFDewY TqAKGaiQ7JdJhAgxOWdP05ycp1WblrYbO0SCtaXgJg8L0lR2xMIw+Oe8OzAv+uEDD2l9 6fnOpN1vv4D2yUKVaT2JHZCS2EgkHP4db9EM4l7ip3q37wL7F5uWFshBXczDGRMuJUox 1SWxuGx+0993mtZ+Goym38hbqGpcArVYyE9t6b8l8IbutN+O5/7yXiMnDR/M7FhIVISX d/9g9w1XuC97w6ae9THw15cTzlH/zf/Ipxh6j8XnRZkXRmCG0oeyVTrqdwPkKIPMu/34 kGtQ== 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:message-id:mime-version:subject :from:to:cc; bh=L3m2JC5GapMYqTiLfpgpy+Syxp+egGM8zqBmpln74FQ=; b=x/1O0LdAty+IT31gYoahBf0yOmVrMoAgYuxzPaR1hfDlMWlORFI2XAjpkzLiwui1Sy JH4RZCWVta548c+Vq+pCO08IgvicHvD8+0WW9mKwetb09YJssYmI4EgHI4WagVXi9zU/ bTJXoKMpaBxqxYEqJM4XXq2EUMusZgpTulrZDWnqAv2p0cT6mzb395ekQ8YsbTJnVpMx hz8DJMd3bsJU28ziz4yg7Qlok2uGZZ4nOScyFRHJQarPQz918Sd1Irbc6V5/UlIo6gNY WOj34XpK5yvy6rzEI/j+a1qDmONZweLjdWc2hsnq3QMHrjdN8S0L6TiKhu4Pwq1IRh5/ bg0w== X-Gm-Message-State: AJIora8HCYdtYmepSdIjf68QoF77oMe0KWrLBEjp1ie4bsDpAO5DnUR7 5TnfRDpOR80M+/7/BTNr/tXLRmVXmn0= X-Google-Smtp-Source: AGRyM1sca9IphNd8CVhj6GCoCv/IHqCsRy7Rx96SSaFVhtFNf05rx3qu5MLsio63ysQSa/8xeUoPppboX9I= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a81:1c45:0:b0:31f:539b:91db with SMTP id c66-20020a811c45000000b0031f539b91dbmr7764607ywc.435.1658964872253; Wed, 27 Jul 2022 16:34:32 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 27 Jul 2022 23:34:21 +0000 Message-Id: <20220727233424.2968356-1-seanjc@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.37.1.359.gd136c6c3e2-goog Subject: [PATCH 0/3] KVM: x86: Intel PERF_CAPABILITIES fix and cleanups 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 Fix a bug where KVM doesn't refresh the vPMU after userspace writes PERF_CAPABILITIES, and then leverage that fix to avoiding checking guest_cpuid_has(X86_FEATURE_PDCM) during VM-Enter, which is slow enough that it shows up in perf traces[*]. [*] https://gist.github.com/avagin/f50a6d569440c9ae382281448c187f4e Sean Christopherson (3): KVM: x86: Refresh PMU after writes to MSR_IA32_PERF_CAPABILITIES KVM: VMX: Use proper type-safe functions for vCPU => LBRs helpers KVM: VMX: Adjust number of LBR records for PERF_CAPABILITIES at refresh arch/x86/kvm/vmx/pmu_intel.c | 12 +++--------- arch/x86/kvm/vmx/vmx.h | 29 ++++++++++++++++++++--------- arch/x86/kvm/x86.c | 4 ++-- 3 files changed, 25 insertions(+), 20 deletions(-) base-commit: 1a4d88a361af4f2e91861d632c6a1fe87a9665c2 -- 2.37.1.359.gd136c6c3e2-goog