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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; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230025)(4636009)(396003)(346002)(136003)(376002)(39860400002)(451199018)(36840700001)(46966006)(40470700004)(36860700001)(86362001)(7636003)(356005)(82740400003)(70586007)(7416002)(70206006)(36756003)(2906002)(8936002)(5660300002)(4326008)(8676002)(41300700001)(82310400005)(47076005)(186003)(26005)(336012)(40480700001)(2616005)(426003)(40460700003)(83380400001)(316002)(54906003)(478600001)(7696005)(110136005);DIR:OUT;SFP:1101; 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230309_031041_436096_AC975C95 X-CRM114-Status: GOOD ( 14.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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)