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=-5.9 required=3.0 tests=BAYES_00, 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 81B4EC07E9C for ; Mon, 12 Jul 2021 01:37:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63C356102A for ; Mon, 12 Jul 2021 01:37:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232066AbhGLBkp (ORCPT ); Sun, 11 Jul 2021 21:40:45 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:11254 "EHLO szxga08-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229660AbhGLBkp (ORCPT ); Sun, 11 Jul 2021 21:40:45 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4GNR8P0TNVz1CHt7; Mon, 12 Jul 2021 09:32:21 +0800 (CST) Received: from dggpeml500013.china.huawei.com (7.185.36.41) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Mon, 12 Jul 2021 09:37:41 +0800 Received: from [10.174.187.161] (10.174.187.161) by dggpeml500013.china.huawei.com (7.185.36.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Mon, 12 Jul 2021 09:37:40 +0800 To: References: <20210622094306.8336-1-lingshan.zhu@intel.com> Subject: Re: [PATCH V7 00/18] KVM: x86/pmu: Add *basic* support to enable guest PEBS via DS CC: , , , , , , , , , , , , , , , , , , "Fangyi (Eric)" , Xiexiangyou From: Liuxiangdong Message-ID: <60EB9CD8.6080608@huawei.com> Date: Mon, 12 Jul 2021 09:37:28 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <20210622094306.8336-1-lingshan.zhu@intel.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [10.174.187.161] X-ClientProxiedBy: dggeme720-chm.china.huawei.com (10.1.199.116) To dggpeml500013.china.huawei.com (7.185.36.41) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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? 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