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 B6FAAC4167B for ; Fri, 1 Dec 2023 01:56:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231697AbjLAB4K (ORCPT ); Thu, 30 Nov 2023 20:56:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231563AbjLAB4I (ORCPT ); Thu, 30 Nov 2023 20:56:08 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0E4C19E for ; Thu, 30 Nov 2023 17:56:14 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5ccc8b7f578so28599077b3.2 for ; Thu, 30 Nov 2023 17:56:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1701395774; x=1702000574; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=UpBBsyYVohX+FTYFefwcFtMNMJUH3TaZgqYxYwvBXOY=; b=g5m715rXsbq9RB3bNRG5/IBH8hxMp04MOk0EWtbLXOSTJCO6vpUpL1MsKBIJxrBGJL K+O+W2A9Htua6xG3Gn8lu66ukoMwPz3TRWKyKe1UlUJ94evpam+AiB35gDT9LN1x0lt4 rzqgGZiVJfufOgTX/Ewp0vLSBRDAjBFgxbZf24NffVTQNrkDSsa+OZJ71akRtQcZcQVO cqHwNVguBSRWagwWAD97eAvEPIvwtWVITzNY9X5v3U4gufeQQ8RriFGfUFPqL/NRwi23 Gr1ei7C3Not9JRfnEoEPz1TITofmdN4WoWkYAaHO3v7DBzatXykvcMYg5g/nMUVZABUE k4Zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701395774; x=1702000574; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UpBBsyYVohX+FTYFefwcFtMNMJUH3TaZgqYxYwvBXOY=; b=siGPb+Q2OodO/JiLM7mJEhqLRXn0RxermgshgAFl+2ZKzHC8zT6l6KYe8gns8BG0yV udPC2zrY0sB9W/0M9WFXPO86zjvatWe1cmJy0PEC/s62X04vT6RDVA18wjgen0qZo1r1 5eaSiDCuWLLbVGK043UxqU1oF3CQHdjWinZfHbjT8TjZVvnPyOdKKQ14UYgf571b2hy1 OJkPfq4oZP5OEGTHJTogPaEO7B+FsHP3uPPrCgVDXgHCfpKdYmYzlwezPvdUMFR5lY3L sJwQCn3dEx5Mn7OjSkJXmrq+BtoNHjD1bkJtJ26x/tWHHEOuJ5GZNUN8P0J5TYV73/Kw G06g== X-Gm-Message-State: AOJu0Yy2fVSMR3ur3mzVtrdOJWb8QKcS+OPSCH9QnEhakFdqX/08dW1k GTTqYrVuujNKL0QyrHo+up/teNZQFhA= X-Google-Smtp-Source: AGHT+IGzAbxxayMyLDqWERzPqpD5Bo/x0IIJ65uHtJJNm2ABavlKe6+btFUsWJ9cdfFF3T0n1HeMmR7p1Cw= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a25:3d44:0:b0:db4:7ac:fea6 with SMTP id k65-20020a253d44000000b00db407acfea6mr711502yba.7.1701395774125; Thu, 30 Nov 2023 17:56:14 -0800 (PST) Date: Thu, 30 Nov 2023 17:52:24 -0800 In-Reply-To: <20231103230541.352265-1-seanjc@google.com> Mime-Version: 1.0 References: <20231103230541.352265-1-seanjc@google.com> X-Mailer: git-send-email 2.43.0.rc2.451.g8631bc7472-goog Message-ID: <170137839352.665680.16618790592517929019.b4-ty@google.com> Subject: Re: [PATCH v2 0/6] KVM: x86/pmu: Clean up emulated PMC event handling From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Dapeng Mi , Mingwei Zhang , Roman Kagan , Jim Mattson , Like Xu Content-Type: text/plain; charset="utf-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 03 Nov 2023 16:05:35 -0700, Sean Christopherson wrote: > The ultimate goal of this series is to track emulated counter events using > a dedicated variable instead of trying to track the previous counter value. > Tracking the previous counter value is flawed as it takes a snapshot at > every emulated event, but only checks for overflow prior to VM-Enter, i.e. > KVM could miss an overflow if KVM ever supports emulating event types that > can occur multiple times in a single VM-Exit. > > [...] Applied to kvm-x86 pmu, thanks! [1/6] KVM: x86/pmu: Move PMU reset logic to common x86 code https://github.com/kvm-x86/linux/commit/cbb359d81a26 [2/6] KVM: x86/pmu: Reset the PMU, i.e. stop counters, before refreshing https://github.com/kvm-x86/linux/commit/1647b52757d5 [3/6] KVM: x86/pmu: Stop calling kvm_pmu_reset() at RESET (it's redundant) https://github.com/kvm-x86/linux/commit/f2f63f7ec6fd [4/6] KVM: x86/pmu: Remove manual clearing of fields in kvm_pmu_init() https://github.com/kvm-x86/linux/commit/ec61b2306dfd [5/6] KVM: x86/pmu: Update sample period in pmc_write_counter() https://github.com/kvm-x86/linux/commit/89acf1237b81 [6/6] KVM: x86/pmu: Track emulated counter events instead of previous counter https://github.com/kvm-x86/linux/commit/fd89499a5151 -- https://github.com/kvm-x86/linux/tree/next