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Thu, 9 Mar 2023 02:54:35 -0800 Received: from drhqmail201.nvidia.com (10.126.190.180) by drhqmail202.nvidia.com (10.126.190.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.37; Thu, 9 Mar 2023 02:54:35 -0800 Received: from Asurada-Nvidia.nvidia.com (10.127.8.11) by mail.nvidia.com (10.126.190.180) with Microsoft SMTP Server id 15.2.986.37 via Frontend Transport; Thu, 9 Mar 2023 02:54:34 -0800 From: Nicolin Chen To: , , CC: , , , , , , , , Subject: [PATCH v1 03/14] iommufd/device: Setup MSI on kernel-managed domains Date: Thu, 9 Mar 2023 02:53:39 -0800 Message-ID: <5149b7e711a46e81aea8515676cf0e45608b3afd.1678348754.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF000108E8:EE_|SJ2PR12MB8649:EE_ X-MS-Office365-Filtering-Correlation-Id: f56f7c7c-84df-4e8c-b1f0-08db208cb19f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Mar 2023 10:54:44.8881 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f56f7c7c-84df-4e8c-b1f0-08db208cb19f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF000108E8.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8649 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759888023575003547?= X-GMAIL-MSGID: =?utf-8?q?1759888023575003547?= The IOMMU_RESV_SW_MSI is a kernel-managed domain thing. So, it should be only setup on a kernel-managed domain only. If the attaching domain is a user-managed domain, redirect the hwpt to hwpt->parent to do it correctly. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/device.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index f95b558f5e95..a3e7d2889164 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -350,7 +350,8 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup, * call iommu_get_msi_cookie() on its behalf. This is necessary to setup * the MSI window so iommu_dma_prepare_msi() can install pages into our * domain after request_irq(). If it is not done interrupts will not - * work on this domain. + * work on this domain. And the msi_cookie should be always set into the + * kernel-managed (parent) domain. * * FIXME: This is conceptually broken for iommufd since we want to allow * userspace to change the domains, eg switch from an identity IOAS to a @@ -358,6 +359,8 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup, * matches what the IRQ layer actually expects in a newly created * domain. */ + if (hwpt->parent) + hwpt = hwpt->parent; if (sw_msi_start != PHYS_ADDR_MAX && !hwpt->msi_cookie) { rc = iommu_get_msi_cookie(hwpt->domain, sw_msi_start); if (rc)