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 3DAA3C433F5 for ; Wed, 6 Apr 2022 13:49:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233947AbiDFNvf (ORCPT ); Wed, 6 Apr 2022 09:51:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233635AbiDFNvQ (ORCPT ); Wed, 6 Apr 2022 09:51:16 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 786D055F66B for ; Wed, 6 Apr 2022 04:26:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649244365; 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=clK4mQhSKxURoMrRIrMnAnalT08fuiMGN0eGeD3I/lY=; b=YZSOPJBByx4IAOm8bAOITjwKkVE+h4ryWxB7HZQovZueDUQ0G+XZQm1xzPC47thp94HTpV kors3Q+K185WcNOf3HMuLT/dgQPAZ0VwW0a/fjRkYVVjD/p/UbhpiVcwt1MiZJSALgjo68 dR1lgsoRGPLfCj95U4qGYNyc/hwku3k= Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-659-T3mTwbX-P9e8E9SvqSABfw-1; Wed, 06 Apr 2022 07:26:04 -0400 X-MC-Unique: T3mTwbX-P9e8E9SvqSABfw-1 Received: by mail-ed1-f69.google.com with SMTP id d19-20020aa7d5d3000000b0041cd772fb03so1046963eds.9 for ; Wed, 06 Apr 2022 04:26:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=clK4mQhSKxURoMrRIrMnAnalT08fuiMGN0eGeD3I/lY=; b=IBN1pUdBN2my3hG469SHEQuXI6V3kcb/02P8xF1u8m394wwFBgyceP77RqtdLut5cU 4KJlz1rgzlgjBLfLk2ogNnMw+AH+PXsY6XhVjXumHidTUHQAPJLHe3FtfMpkeqpIZoZk jW9MDt0y5y4U3yJlEA0LKwGpqsoJ1uDvV33SCBuQSWm0CRj7OvwYqKFNOr1VAtTnAUwY AtTKG39daL01EXlLa5ztaO3AG5WVEx/q/s93D22uvGF8CSzn5fIlYTWRJctXupo+wFLM aikkuvXIP86QuC5SGYjHNMblypGM8yOtr16k/EREhOl5LDstUIqqMm6evzj/Fxed2EpN OOcQ== X-Gm-Message-State: AOAM531KH9ChlSLduNOW+LiiC4l42aoqGYLZG0/yyy+o9inABHQ34saV TOy4s2Q13AhPjnJ0vtfDvsQuDtsehgjoS7agHDlCGxh7wlmLtPRZqCz6GmtptxC00KUmjlj+cJq CplNETv9HAIPQ X-Received: by 2002:a17:907:eaa:b0:6e8:2f3:45f9 with SMTP id ho42-20020a1709070eaa00b006e802f345f9mr8050134ejc.323.1649244363401; Wed, 06 Apr 2022 04:26:03 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwR7GzG0hS7kBevOXm+ERUBNeUao9+p0S9glggxmPxAvVTf3S4VH6qrS14gYIvTbRpsyWqEHA== X-Received: by 2002:a17:907:eaa:b0:6e8:2f3:45f9 with SMTP id ho42-20020a1709070eaa00b006e802f345f9mr8050115ejc.323.1649244363157; Wed, 06 Apr 2022 04:26:03 -0700 (PDT) Received: from ?IPV6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.googlemail.com with ESMTPSA id cn27-20020a0564020cbb00b00418b0c7fbbfsm7634266edb.32.2022.04.06.04.26.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 06 Apr 2022 04:26:02 -0700 (PDT) Message-ID: Date: Wed, 6 Apr 2022 13:26:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [RFC PATCH v5 033/104] KVM: x86: Add infrastructure for stolen GPA bits Content-Language: en-US To: Kai Huang , isaku.yamahata@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@gmail.com, Jim Mattson , erdemaktas@google.com, Connor Kuehl , Sean Christopherson References: <2b8038c17b85658a054191b362840240bd66e46b.camel@intel.com> <5443b630-d2c8-b0c3-14f5-2b6b3f71221c@redhat.com> From: Paolo Bonzini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 4/6/22 04:23, Kai Huang wrote: >> >>>> >>>> >>>> - gfn = gpte_to_gfn(gpte); >>>> + gfn = gpte_to_gfn(vcpu, gpte); >>>> pte_access = sp->role.access; >>>> pte_access &= FNAME(gpte_access)(gpte); >>>> FNAME(protect_clean_gpte)(vcpu->arch.mmu, &pte_access, gpte); >>> >>> In commit message you mentioned "Don't support stolen bits for shadow EPT" (you >>> actually mean shadow MMU I suppose), yet there's bunch of code change to shadow >>> MMU. >> >> It's a bit ugly, but it's uglier to keep two versions of gpte_to_gfn. > > gpte_to_gfn() is only used in paging_tmpl.h. Could you elaborate why we need to > keep two versions of it? You're right. Yeah, considering page table walks are not supported when private memory is available, it shouldn't be necessary to change paging_tmpl.h. Paolo