From patchwork Fri Jul 19 12:04:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joao Martins X-Patchwork-Id: 13737247 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 48668C3DA5D for ; Fri, 19 Jul 2024 12:11:27 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sUmRp-0003BR-GT; Fri, 19 Jul 2024 08:10:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sUmRh-0002cL-2R for qemu-devel@nongnu.org; Fri, 19 Jul 2024 08:10:47 -0400 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sUmRe-0007fc-Kn for qemu-devel@nongnu.org; Fri, 19 Jul 2024 08:10:44 -0400 Received: from pps.filterd (m0246631.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46JC5ZFK015782; Fri, 19 Jul 2024 12:10:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=corp-2023-11-20; bh=d 3InZZPKqwQj+5FqIQz9OCEKe3TvmN8jRvFc5PxWhAM=; b=BAmeYlljzGW14OpBl yLh/vp/vSLq+PSroHW0oWYIWKVzxZXh4m1vvXKyQUtaG1ANNkQla2Twxk+apVAns IMvF5Aak56BlqxugZRZcC5YaJ/03SF1P79BU6hdqBcUtdTE7WBhUDVPD2glUbZBQ QlyF4CLL0T6e5fUenI8zLKYA35BCm7uE/d881WPcLNZ/RpcOcMnjhTMBdnuDkit9 Cndf+vwEyOs44EPd27UQC1B3VeHvYGjREfjkVYFUaW6IaJnjY+un/fR2X4r9B0Nw F2Qej6xzAEjTngOkufQ0PYh11vDFzWHnZuRGnZy0daBm5V2MFHnu+YX6Em8bPCQj 2Vbbg== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 40fquag0pb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 19 Jul 2024 12:10:40 +0000 (GMT) Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 46JBMRbu039507; Fri, 19 Jul 2024 12:05:39 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 40dwexk3qk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 19 Jul 2024 12:05:39 +0000 Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46JC5DMT011010; Fri, 19 Jul 2024 12:05:39 GMT Received: from joaomart-mac.nl.oracle.com (dhcp-10-175-12-11.vpn.oracle.com [10.175.12.11]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 40dwexk34j-10; Fri, 19 Jul 2024 12:05:38 +0000 From: Joao Martins To: qemu-devel@nongnu.org Cc: Yi Liu , Eric Auger , Zhenzhong Duan , Alex Williamson , Cedric Le Goater , Jason Gunthorpe , Avihai Horon , Joao Martins Subject: [PATCH v5 09/13] vfio/iommufd: Probe and request hwpt dirty tracking capability Date: Fri, 19 Jul 2024 13:04:57 +0100 Message-Id: <20240719120501.81279-10-joao.m.martins@oracle.com> In-Reply-To: <20240719120501.81279-1-joao.m.martins@oracle.com> References: <20240719120501.81279-1-joao.m.martins@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-19_06,2024-07-18_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 suspectscore=0 spamscore=0 bulkscore=0 mlxscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2407110000 definitions=main-2407190093 X-Proofpoint-GUID: -dJONroY4nQhB8eLwh3l12zqsRd3NXBa X-Proofpoint-ORIG-GUID: -dJONroY4nQhB8eLwh3l12zqsRd3NXBa Received-SPF: pass client-ip=205.220.177.32; envelope-from=joao.m.martins@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org In preparation to using the dirty tracking UAPI, probe whether the IOMMU supports dirty tracking. This is done via the data stored in hiod::caps::hw_caps initialized from GET_HW_INFO. Qemu doesn't know if VF dirty tracking is supported when allocating hardware pagetable in iommufd_cdev_autodomains_get(). This is because VFIODevice migration state hasn't been initialized *yet* hence it can't pick between VF dirty tracking vs IOMMU dirty tracking. So, if IOMMU supports dirty tracking it always creates HWPTs with IOMMU_HWPT_ALLOC_DIRTY_TRACKING even if later on VFIOMigration decides to use VF dirty tracking instead. Signed-off-by: Joao Martins --- include/hw/vfio/vfio-common.h | 1 + hw/vfio/iommufd.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 4e44b26d3c45..7e530c7869dc 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -97,6 +97,7 @@ typedef struct IOMMUFDBackend IOMMUFDBackend; typedef struct VFIOIOASHwpt { uint32_t hwpt_id; + uint32_t hwpt_flags; QLIST_HEAD(, VFIODevice) device_list; QLIST_ENTRY(VFIOIOASHwpt) next; } VFIOIOASHwpt; diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index bb44d948c735..2e5c207bbca0 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -110,6 +110,11 @@ static void iommufd_cdev_unbind_and_disconnect(VFIODevice *vbasedev) iommufd_backend_disconnect(vbasedev->iommufd); } +static bool iommufd_hwpt_dirty_tracking(VFIOIOASHwpt *hwpt) +{ + return hwpt && hwpt->hwpt_flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING; +} + static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp) { ERRP_GUARD(); @@ -246,6 +251,17 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev, } } + /* + * This is quite early and VFIO Migration state isn't yet fully + * initialized, thus rely only on IOMMU hardware capabilities as to + * whether IOMMU dirty tracking is going to be requested. Later + * vfio_migration_realize() may decide to use VF dirty tracking + * instead. + */ + if (vbasedev->hiod->caps.hw_caps & IOMMU_HW_CAP_DIRTY_TRACKING) { + flags = IOMMU_HWPT_ALLOC_DIRTY_TRACKING; + } + if (!iommufd_backend_alloc_hwpt(iommufd, vbasedev->devid, container->ioas_id, flags, IOMMU_HWPT_DATA_NONE, 0, NULL, @@ -255,6 +271,7 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev, hwpt = g_malloc0(sizeof(*hwpt)); hwpt->hwpt_id = hwpt_id; + hwpt->hwpt_flags = flags; QLIST_INIT(&hwpt->device_list); ret = iommufd_cdev_attach_ioas_hwpt(vbasedev, hwpt->hwpt_id, errp); @@ -267,6 +284,8 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev, vbasedev->hwpt = hwpt; QLIST_INSERT_HEAD(&hwpt->device_list, vbasedev, hwpt_next); QLIST_INSERT_HEAD(&container->hwpt_list, hwpt, next); + container->bcontainer.dirty_pages_supported |= + iommufd_hwpt_dirty_tracking(hwpt); return true; }