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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 38148C3A5A0 for ; Mon, 19 Aug 2019 12:58:18 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0BF11205C9 for ; Mon, 19 Aug 2019 12:58:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0BF11205C9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49740 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hzhEm-00036d-Ms for qemu-devel@archiver.kernel.org; Mon, 19 Aug 2019 08:58:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42967) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hzh1p-0005fn-Un for qemu-devel@nongnu.org; Mon, 19 Aug 2019 08:44:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hzh1o-0003pC-Jc for qemu-devel@nongnu.org; Mon, 19 Aug 2019 08:44:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41488) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hzh1o-0003oS-93 for qemu-devel@nongnu.org; Mon, 19 Aug 2019 08:44:52 -0400 Received: from mail-pg1-f200.google.com (mail-pg1-f200.google.com [209.85.215.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8D3B8C057F31 for ; Mon, 19 Aug 2019 12:44:51 +0000 (UTC) Received: by mail-pg1-f200.google.com with SMTP id z35so2506075pgk.10 for ; Mon, 19 Aug 2019 05:44:51 -0700 (PDT) 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:user-agent; bh=VX59h7cYMfm7tHfMNYleY8XgaDwvKlk0BYd+QJymBwk=; b=d8+ZFTqCv7UJmlNrFeIoF/7HoOB84MvDDxGWSvwd2gLhCq/QABA32IFUeEkOq0ZG4J H2E+QG1TWFPXAMb5ypmrTHfqCe0hH6e9lGpSymxSNyK5wv0Tw5RYy6VPEfYUsDYHEUgM JQOJyCmh4bWs/limulBVrt51FId26cGSIAsBD1Y4RH4RrojgXp0i9DC5vzbSPJcYwbll GjgoyfM2bkfJkj/3xftq9yzocc+H+1Na4zb79itKLisjo2HX0zB9AlZRM099+Kplv/QT 5IpTTPW7Wwp91Xj86jW6lOPGHoxsiQfrx75CmrnM5FAqSg0H5H7F53pldyYAMULHhyCO MUDQ== X-Gm-Message-State: APjAAAWL6fUp5Z61ZbQNQWC6uo1xp4P0rtBD1CXaGse7i/bcvkp0Uazz vIVyApPU5eeONNFop+Wfongek7XLxpb/BGkCGCkdWpM3BRCTRxJ1NB/bYM+H3UiQ7sZAAHZh48/ +9XLM/jYzTDxJc0k= X-Received: by 2002:a17:902:2ae9:: with SMTP id j96mr12769964plb.10.1566218691147; Mon, 19 Aug 2019 05:44:51 -0700 (PDT) X-Google-Smtp-Source: APXvYqyrYbay3xVMt1ctWFr5kZshNjIYr4lxtnwgUyEA+AlZ8CLWvD/VQ2xjLQXAC0kG9T/xv36YGg== X-Received: by 2002:a17:902:2ae9:: with SMTP id j96mr12769951plb.10.1566218690954; Mon, 19 Aug 2019 05:44:50 -0700 (PDT) Received: from xz-x1 ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id v18sm16431169pgl.87.2019.08.19.05.44.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Aug 2019 05:44:50 -0700 (PDT) Date: Mon, 19 Aug 2019 20:44:38 +0800 From: Peter Xu To: Eric Auger Message-ID: <20190819124438.GE13560@xz-x1> References: <20190730172137.23114-1-eric.auger@redhat.com> <20190730172137.23114-14-eric.auger@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190730172137.23114-14-eric.auger@redhat.com> User-Agent: Mutt/1.11.4 (2019-03-13) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH for-4.2 v10 13/15] virtio_iommu: Handle reserved regions in translation process X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, kevin.tian@intel.com, mst@redhat.com, tn@semihalf.com, qemu-devel@nongnu.org, alex.williamson@redhat.com, qemu-arm@nongnu.org, jean-philippe@linaro.org, bharat.bhushan@nxp.com, eric.auger.pro@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jul 30, 2019 at 07:21:35PM +0200, Eric Auger wrote: > When translating an address we need to check if it belongs to > a reserved virtual address range. If it does, there are 2 cases: > > - it belongs to a RESERVED region: the guest should neither use > this address in a MAP not instruct the end-point to DMA on > them. We report an error > > - It belongs to an MSI region: we bypass the translation. > > Signed-off-by: Eric Auger Reviewed-by: Peter Xu -- Peter Xu