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=-0.9 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 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 542DFC33CB1 for ; Thu, 16 Jan 2020 08:38:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2700D2073A for ; Thu, 16 Jan 2020 08:38:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ag+LGri+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731229AbgAPIi3 (ORCPT ); Thu, 16 Jan 2020 03:38:29 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:55376 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727003AbgAPIi2 (ORCPT ); Thu, 16 Jan 2020 03:38:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579163908; 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: in-reply-to:in-reply-to:references:references; bh=IXtSmPS0i6Qsp99yh//fgz82ZG06+bv6j5QX91/2YyA=; b=ag+LGri+lLDYHUGNGUm4wSWQJdFTAdE4g4qUEil9toltT9/7wvsi53c2tALoTTIpfYkjEf 3YF1c5Q1Sf6NddRW6p1ZiCJrMD4BSVGnF6b+OMJlJUGUlE59mg8X8aeLvHOq4h5lOUBlBu 83Q8X9JnP177K96yJOXlkUSIVv+8JY0= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-72-fv8lU_O8PFCebhCmS2oC-w-1; Thu, 16 Jan 2020 03:38:27 -0500 X-MC-Unique: fv8lU_O8PFCebhCmS2oC-w-1 Received: by mail-wm1-f69.google.com with SMTP id l11so2097545wmi.0 for ; Thu, 16 Jan 2020 00:38:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=IXtSmPS0i6Qsp99yh//fgz82ZG06+bv6j5QX91/2YyA=; b=kYXxem6xGfJ3AgokdbUh2fTFyShoV0NPt4kqNlKaHf6fhwJDBl5hzs5oAyj5jW+R82 iTeuualDRRcmlxCieu1FadoCU32kUuZQyZIM2NsbR9Mk8gr9fXC8JYl9Kzu+CyMTfrPr AfU+H8UvDQ5u3PJMS7Ok95uxUXZqHAJIi5FoeJMSVUqM14nIQ+VqXtJVdH87bZ3bROcU 3X9aoPXU8xlfWeqkgzhJh5ZTBLyqyMkMpc6+OUG5mWRniCzrfV+dbDOzKodKuVXsSV3n bicppcNErMDUFOM+DnA/B9fAWypDq4X7KavFaON3g2T1HC/FMfz5c8Tv8NwBhD6nXoWc plng== X-Gm-Message-State: APjAAAUOXfnHCqtijpsW6r1t5b1mHjjYH9IAp5CKYwBD0d2ewFYceOYS AJKdR8OW5Qkz/VZ9kAX+bilnTXI6se0NPD8pAydfIpgbj3NLlRVjbpVTC+HQJgIVPueUaM2ZByu SnW+47I+z4e6broduoUJmDMO8 X-Received: by 2002:a05:6000:118d:: with SMTP id g13mr2102069wrx.141.1579163905495; Thu, 16 Jan 2020 00:38:25 -0800 (PST) X-Google-Smtp-Source: APXvYqwGO77Z98jPmNC+6Lx21D2RFFW5UOBHp3rIpKkBmINzKtpHw/Lyr1d04DYLp7eI2k9wrDOeaA== X-Received: by 2002:a05:6000:118d:: with SMTP id g13mr2102044wrx.141.1579163905272; Thu, 16 Jan 2020 00:38:25 -0800 (PST) Received: from redhat.com (bzq-79-179-85-180.red.bezeqint.net. [79.179.85.180]) by smtp.gmail.com with ESMTPSA id y139sm2277799wmd.24.2020.01.16.00.38.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jan 2020 00:38:24 -0800 (PST) Date: Thu, 16 Jan 2020 03:38:21 -0500 From: "Michael S. Tsirkin" To: Peter Xu Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Christophe de Dinechin , Paolo Bonzini , Sean Christopherson , Yan Zhao , Alex Williamson , Jason Wang , Kevin Kevin , Vitaly Kuznetsov , "Dr . David Alan Gilbert" , Lei Cao Subject: Re: [PATCH v3 12/21] KVM: X86: Implement ring-based dirty memory tracking Message-ID: <20200116033725-mutt-send-email-mst@kernel.org> References: <20200109145729.32898-1-peterx@redhat.com> <20200109145729.32898-13-peterx@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200109145729.32898-13-peterx@redhat.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 09, 2020 at 09:57:20AM -0500, Peter Xu wrote: > + /* If to map any writable page within dirty ring, fail it */ > + if ((kvm_page_in_dirty_ring(vcpu->kvm, vma->vm_pgoff) || > + kvm_page_in_dirty_ring(vcpu->kvm, vma->vm_pgoff + pages - 1)) && > + vma->vm_flags & VM_WRITE) > + return -EINVAL; Worth thinking about other flags. Do we want to force VM_SHARED? Disable VM_EXEC?