From nobody Mon Feb 9 09:43:13 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.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 (zohomail.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=intel.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1580299992471826.6663167956254; Wed, 29 Jan 2020 04:13:12 -0800 (PST) Received: from localhost ([::1]:45372 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iwmDW-0000wP-Ub for importer@patchew.org; Wed, 29 Jan 2020 07:13:10 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52225) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iwmCI-0007cz-4u for qemu-devel@nongnu.org; Wed, 29 Jan 2020 07:11:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iwmCG-0001Zg-OF for qemu-devel@nongnu.org; Wed, 29 Jan 2020 07:11:54 -0500 Received: from mga09.intel.com ([134.134.136.24]:58702) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iwmCG-0001NW-FA for qemu-devel@nongnu.org; Wed, 29 Jan 2020 07:11:52 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jan 2020 04:11:47 -0800 Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by fmsmga001.fm.intel.com with ESMTP; 29 Jan 2020 04:11:47 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,377,1574150400"; d="scan'208";a="314070960" From: "Liu, Yi L" To: qemu-devel@nongnu.org, david@gibson.dropbear.id.au, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com Subject: [RFC v3 09/25] vfio: check VFIO_TYPE1_NESTING_IOMMU support Date: Wed, 29 Jan 2020 04:16:40 -0800 Message-Id: <1580300216-86172-10-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1580300216-86172-1-git-send-email-yi.l.liu@intel.com> References: <1580300216-86172-1-git-send-email-yi.l.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.24 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: kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , kvm@vger.kernel.org, mst@redhat.com, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, Jacob Pan , hao.wu@intel.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Liu Yi L VFIO needs to check VFIO_TYPE1_NESTING_IOMMU support with Kernel before further using it. e.g. requires to check IOMMU UAPI version. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Cc: Alex Williamson Signed-off-by: Liu Yi L Signed-off-by: Yi Sun --- hw/vfio/common.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 0cc7ff5..a5e70b1 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1157,12 +1157,21 @@ static void vfio_put_address_space(VFIOAddressSpace= *space) static int vfio_get_iommu_type(VFIOContainer *container, Error **errp) { - int iommu_types[] =3D { VFIO_TYPE1v2_IOMMU, VFIO_TYPE1_IOMMU, + int iommu_types[] =3D { VFIO_TYPE1_NESTING_IOMMU, + VFIO_TYPE1v2_IOMMU, VFIO_TYPE1_IOMMU, VFIO_SPAPR_TCE_v2_IOMMU, VFIO_SPAPR_TCE_IOMMU }; - int i; + int i, version; =20 for (i =3D 0; i < ARRAY_SIZE(iommu_types); i++) { if (ioctl(container->fd, VFIO_CHECK_EXTENSION, iommu_types[i])) { + if (iommu_types[i] =3D=3D VFIO_TYPE1_NESTING_IOMMU) { + version =3D ioctl(container->fd, + VFIO_NESTING_GET_IOMMU_UAPI_VERSION); + if (version < IOMMU_UAPI_VERSION) { + printf("IOMMU UAPI incompatible for nesting\n"); + continue; + } + } return iommu_types[i]; } } @@ -1278,6 +1287,7 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, } =20 switch (container->iommu_type) { + case VFIO_TYPE1_NESTING_IOMMU: case VFIO_TYPE1v2_IOMMU: case VFIO_TYPE1_IOMMU: { --=20 2.7.4