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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, 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 7A56BC3F2D1 for ; Mon, 2 Mar 2020 16:20:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C9AD217F4 for ; Mon, 2 Mar 2020 16:20:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="d8tjR1Bq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727308AbgCBQUT (ORCPT ); Mon, 2 Mar 2020 11:20:19 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:44530 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726661AbgCBQUS (ORCPT ); Mon, 2 Mar 2020 11:20:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583166018; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dy2VYWwVWhSvzuqB6gToR7pJSPiAWRfT7pUZn4SEGOw=; b=d8tjR1BqFfdPiwtqFkescCL3KPqDlrOTV81uLA63qcSU/lB+AkmyaPNRJvXIJjMr4vOdZl 6Gno1c3VcOIaTxgp04uhGqvBIY6OmlIxss9j2jaVey3HyL54kJcvbU/plqMnE45wnK5gD6 WffpSiFBt4ihnVZynyPijNiVA6hxo5M= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-437-mJTb85PRM8SVgcXVQ_gvUQ-1; Mon, 02 Mar 2020 11:20:16 -0500 X-MC-Unique: mJTb85PRM8SVgcXVQ_gvUQ-1 Received: by mail-wr1-f72.google.com with SMTP id c6so5979327wrm.18 for ; Mon, 02 Mar 2020 08:20:15 -0800 (PST) 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=dy2VYWwVWhSvzuqB6gToR7pJSPiAWRfT7pUZn4SEGOw=; b=NOdP8bkitOw6ig4YTrUHvvW0ov8ncugY4vmscEDqzrTCCHslxSuDhYgmTs/sRa1DMW FvHvYsls5wuc0yhe/pFLyuwA10w59LW3Nn+a7cJwF/hqDXJ1n02kxDMhq5FM/rr+SK8h fzuBBy5KC6NztoIS+mkuoT87Wld4xlxp+cWOa3OpzzBkiFh5Bew2aBwSahUD2ENAA7Ev od+azrasSkxkvrI6kuo4j1CwpW22BCjVtVnm3H39tbiqnFqz6v0gDGa5uGa/LQkpGrh8 cI3wWXJ398Hk4lEYYGibTBcTWoIl6gGNy/N7Xf9cCHIducOKil/RRebSePSbwFQ4EA80 EL5A== X-Gm-Message-State: ANhLgQ03JaXNbmnW+0k54lTVkdVDfI2KfSKTMYrWRqL+WCsHjjmTEe9z U6e3x1lFdcdeJEu4aNAnnMiZO99OoTd6gNDoblT9WgoNzdHSu+TZKb3v1HslMy1kO4jnnXsLDkU wLgX0wGmkMw0u8ABbbCPbeySD X-Received: by 2002:adf:e74a:: with SMTP id c10mr341818wrn.113.1583166014975; Mon, 02 Mar 2020 08:20:14 -0800 (PST) X-Google-Smtp-Source: ADFU+vsFba2ap/3M2C8V1ZLS9AbnIszACse8Qml7+E+3tl18MRaCrS1ooNkZd4X3DTQzJig9UjS+Jw== X-Received: by 2002:adf:e74a:: with SMTP id c10mr341803wrn.113.1583166014808; Mon, 02 Mar 2020 08:20:14 -0800 (PST) Received: from [192.168.178.40] ([151.30.85.6]) by smtp.gmail.com with ESMTPSA id z14sm29021610wru.31.2020.03.02.08.20.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Mar 2020 08:20:14 -0800 (PST) Subject: Re: [PATCH 0/2] KVM: x86/mmu: Fast CR3 switch improvements To: Sean Christopherson Cc: Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200228225240.8646-1-sean.j.christopherson@intel.com> From: Paolo Bonzini Message-ID: Date: Mon, 2 Mar 2020 17:20:11 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200228225240.8646-1-sean.j.christopherson@intel.com> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 28/02/20 23:52, Sean Christopherson wrote: > Two improvements for fast CR3 switch, implemented with nested VMX in mind, > but they should be helpful in general. > > Sean Christopherson (2): > KVM: x86/mmu: Ignore guest CR3 on fast root switch for direct MMU > KVM: x86/mmu: Reuse the current root if possible for fast switch > > arch/x86/kvm/mmu/mmu.c | 19 +++++++++++++++---- > 1 file changed, 15 insertions(+), 4 deletions(-) > Queued, thanks. Paolo