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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 77465C0650E for ; Mon, 1 Jul 2019 09:36:25 +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 529E0206E0 for ; Mon, 1 Jul 2019 09:36:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 529E0206E0 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]:56456 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hhsjY-0004bH-AI for qemu-devel@archiver.kernel.org; Mon, 01 Jul 2019 05:36:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49661) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hhseh-0002Pb-Vh for qemu-devel@nongnu.org; Mon, 01 Jul 2019 05:31:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hhseg-0000Px-RR for qemu-devel@nongnu.org; Mon, 01 Jul 2019 05:31:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54962) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hhsee-00009G-50; Mon, 01 Jul 2019 05:31:20 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 35B66811D8; Mon, 1 Jul 2019 09:30:56 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-89.ams2.redhat.com [10.36.116.89]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3C02C7DF6B; Mon, 1 Jul 2019 09:30:53 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, peterx@redhat.com, pbonzini@redhat.com, alex.williamson@redhat.com Date: Mon, 1 Jul 2019 11:30:30 +0200 Message-Id: <20190701093034.18873-3-eric.auger@redhat.com> In-Reply-To: <20190701093034.18873-1-eric.auger@redhat.com> References: <20190701093034.18873-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 01 Jul 2019 09:31:01 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 2/6] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We introduce a new IOMMU Memory Region attribute, IOMMU_ATTR_VFIO_NESTED that tells whether the virtual IOMMU requires physical nested stages for VFIO integration. Current Intel virtual IOMMU device supports "Caching Mode" and does not require 2 stages at physical level to be integrated with VFIO. However SMMUv3 does not implement such "caching mode" and requires to use physical stage 1 for VFIO integration. Signed-off-by: Eric Auger --- include/exec/memory.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/exec/memory.h b/include/exec/memory.h index bdd76653a8..dd7ef23f96 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -204,7 +204,8 @@ struct MemoryRegionOps { }; =20 enum IOMMUMemoryRegionAttr { - IOMMU_ATTR_SPAPR_TCE_FD + IOMMU_ATTR_SPAPR_TCE_FD, + IOMMU_ATTR_VFIO_NESTED, }; =20 /** --=20 2.20.1