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=-5.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 EC2ECC07E9C for ; Mon, 12 Jul 2021 10:34:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4E5A61006 for ; Mon, 12 Jul 2021 10:34:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234817AbhGLKhZ (ORCPT ); Mon, 12 Jul 2021 06:37:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234100AbhGLKhR (ORCPT ); Mon, 12 Jul 2021 06:37:17 -0400 Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D40DC0613E5; Mon, 12 Jul 2021 03:34:28 -0700 (PDT) Received: by mail-pf1-x431.google.com with SMTP id j199so15990183pfd.7; Mon, 12 Jul 2021 03:34:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=bZZ+r9TAdHHsxLCRnmElJouEcg6KlMoFa+SwP9B2Hb8=; b=n07LaDd+Q7BHFZ1vVP3/p0OAnGpuEo1aN5MQHACQHE+5AQKxKeOngqDi/cktBfJ5au VsXgFGRxJKYwn04MOnbCGX/4+k8F0GrlH90Z9UNIGBYE1YebAawjlIIXdslozBdMcFTb cqL4vbjG7/94hBU3at723lOA/N9VtYyNMnNn2TIjsf1DTT4KRInKDGMKiv066Yn5m1GD 2OYPMS36P1P5LZL5JNre5JyrOfdwYbPVjChMsLs+XNKU5Q2/AeiDBID27WhDQeYcI1vO T1j3g73S69kfFDVXPxDNCbNbU9wiNFTXLOJlfiOivdb8P5ltxFQT8iN3l5KgMlUqnpoP mHfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=bZZ+r9TAdHHsxLCRnmElJouEcg6KlMoFa+SwP9B2Hb8=; b=LasItA0joza+ExQm27QLPgfiA9gVUJeoZlsdV7wKa+yEXWSSSnJNRPChGTqYl+nMIu QqC2VxRmciV/t757CchkG1mJb3PJgNElNsfovBZsTbTkVuNmpfRB2WF/TZPj8Jp42nZ7 22T4MICHB0rG45j4/ePyweR5BaVM7setkDlXTATC8RuoG/dhLtsdPhtSAl8EoIfJUpOh uTgoPBDzzROr4YwGy/+mY1wi8ggbD/g/PnL9FJEOOuPtIyF1O3gtmNyLXPODewDsS6bb wTp6Vp//h7fc+9jH2DO1v8qb+v/7xg1RL++ePIk+Ue+uOeWazQE81+mpH8UaprfSA3MG Iy1g== X-Gm-Message-State: AOAM5317ucN9lIGBVgzgEh7nSxmDp3wavfLbrJZhQ+Exxd8bgb136dko XtKGsM63nN0qNQssEyxcPGA= X-Google-Smtp-Source: ABdhPJwxaxzVfwaz971hhX33+UhGltIgWQMW5Y3fx9QbUmbuDSwJRSgYHxNK4f01wYPASuV2LUc6oA== X-Received: by 2002:a63:1a5b:: with SMTP id a27mr53401043pgm.427.1626086068019; Mon, 12 Jul 2021 03:34:28 -0700 (PDT) Received: from Likes-MacBook-Pro.local ([103.7.29.32]) by smtp.gmail.com with ESMTPSA id nl2sm3803193pjb.10.2021.07.12.03.34.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Jul 2021 03:34:27 -0700 (PDT) Subject: Re: [PATCH V7 00/18] KVM: x86/pmu: Add *basic* support to enable guest PEBS via DS To: Liuxiangdong , lingshan.zhu@intel.com Cc: ak@linux.intel.com, bp@alien8.de, eranian@google.com, jmattson@google.com, joro@8bytes.org, kan.liang@linux.intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, peterz@infradead.org, seanjc@google.com, vkuznets@redhat.com, wanpengli@tencent.com, wei.w.wang@intel.com, weijiang.yang@intel.com, x86@kernel.org, "Fangyi (Eric)" , Xiexiangyou References: <20210622094306.8336-1-lingshan.zhu@intel.com> <60EB9CD8.6080608@huawei.com> From: Like Xu Message-ID: <19b7db9e-ccde-ca1f-3e17-09e718a1f3a4@gmail.com> Date: Mon, 12 Jul 2021 18:34:17 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <60EB9CD8.6080608@huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/7/2021 9:37 am, Liuxiangdong wrote: > Hi， Lingshan. > > We can use basic pebs for KVM Guest on ICX by this patches set. Will we > consider supporting "perf mem" for KVM Guest? > I suggest we can enable more advanced PEBS features after the basic support hits the mainline. > AFAIK, the load latency facility requires processor supporting PEBS. > Besides, it needs MSR_PEBS_LD_LAT_THRESHOLD > msr (3F6H) to specify the desired latency threshold. How about > passthrough this msr to Guest? > > Thanks! > Xiangdong Liu > >