From nobody Sat Feb 7 08:06:58 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1561973795; cv=none; d=zoho.com; s=zohoarc; b=fizG1VyRn6EoQ+JaVLiESa49X6q817D5KG5cumoZ7xZTLyGKDMrVsg7hSlHWfzy699Zy7JOjG+XNC3fN6k8RyfHpZ3wtQFfnoWIC2c7q+al35oTHTayrw1r+Nqf+L0vYrwOrD+W8SEF2/lOOf4wTovzzHOKnasG6yBxGvEYTreQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1561973795; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=QJOz5IxboWBUAR0WhSEvSs4gEZE6WbU5uudqeG1JbUc=; b=IJmQcOy/jC1kucPSfROS8VY6qhi8W7wVT6ySug9aaKzbCUmoHOAn6bPhIJUFvG+214HMY/xYYuzijuvpNE19VVGSR0ZApcG/WX6qCQMoG/davdNK/mpWr+gGEmr6AYapZ9YrVaH2iq2jJEaB8qPFib9VetLkIJkQ/oRyMdDcJOQ= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1561973795173904.9105693663738; Mon, 1 Jul 2019 02:36:35 -0700 (PDT) Received: from localhost ([::1]:56456 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hhsjc-0004bH-Do for importer@patchew.org; Mon, 01 Jul 2019 05:36:28 -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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" 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