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Wed, 7 Aug 2024 12:00:18 -0700 From: Nicolin Chen To: , , CC: , , , , , Subject: [PATCH v3 1/4] iommufd: Reorder include files Date: Wed, 7 Aug 2024 12:00:04 -0700 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001509:EE_|MN2PR12MB4094:EE_ X-MS-Office365-Filtering-Correlation-Id: 46ef7adc-0140-46b3-7f74-08dcb7133998 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(1800799024)(82310400026)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2024 19:00:37.6918 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 46ef7adc-0140-46b3-7f74-08dcb7133998 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00001509.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4094 Reorder include files to alphabetic order to simplify maintenance, and separate local headers and global headers with a blank line. No functional change intended. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/device.c | 4 ++-- drivers/iommu/iommufd/fault.c | 4 ++-- drivers/iommu/iommufd/io_pagetable.c | 8 ++++---- drivers/iommu/iommufd/io_pagetable.h | 2 +- drivers/iommu/iommufd/ioas.c | 2 +- drivers/iommu/iommufd/iommufd_private.h | 9 +++++---- drivers/iommu/iommufd/iommufd_test.h | 2 +- drivers/iommu/iommufd/iova_bitmap.c | 2 +- drivers/iommu/iommufd/main.c | 8 ++++---- drivers/iommu/iommufd/pages.c | 10 +++++----- drivers/iommu/iommufd/selftest.c | 8 ++++---- include/linux/iommufd.h | 4 ++-- include/uapi/linux/iommufd.h | 2 +- 13 files changed, 33 insertions(+), 32 deletions(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index bcbcd6d94062..5fd3dd420290 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -1,12 +1,12 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */ +#include #include #include -#include #include -#include "../iommu-priv.h" +#include "../iommu-priv.h" #include "io_pagetable.h" #include "iommufd_private.h" diff --git a/drivers/iommu/iommufd/fault.c b/drivers/iommu/iommufd/fault.c index a643d5c7c535..df03411c8728 100644 --- a/drivers/iommu/iommufd/fault.c +++ b/drivers/iommu/iommufd/fault.c @@ -3,14 +3,14 @@ */ #define pr_fmt(fmt) "iommufd: " fmt +#include #include #include +#include #include #include -#include #include #include -#include #include #include "../iommu-priv.h" diff --git a/drivers/iommu/iommufd/io_pagetable.c b/drivers/iommu/iommufd/io_pagetable.c index 05fd9d3abf1b..bbbc8a044bcf 100644 --- a/drivers/iommu/iommufd/io_pagetable.c +++ b/drivers/iommu/iommufd/io_pagetable.c @@ -8,17 +8,17 @@ * The datastructure uses the iopt_pages to optimize the storage of the PFNs * between the domains and xarray. */ +#include +#include +#include #include #include -#include #include -#include #include -#include #include -#include "io_pagetable.h" #include "double_span.h" +#include "io_pagetable.h" struct iopt_pages_list { struct iopt_pages *pages; diff --git a/drivers/iommu/iommufd/io_pagetable.h b/drivers/iommu/iommufd/io_pagetable.h index 0ec3509b7e33..c61d74471684 100644 --- a/drivers/iommu/iommufd/io_pagetable.h +++ b/drivers/iommu/iommufd/io_pagetable.h @@ -6,8 +6,8 @@ #define __IO_PAGETABLE_H #include -#include #include +#include #include #include "iommufd_private.h" diff --git a/drivers/iommu/iommufd/ioas.c b/drivers/iommu/iommufd/ioas.c index 742248276548..82428e44a837 100644 --- a/drivers/iommu/iommufd/ioas.c +++ b/drivers/iommu/iommufd/ioas.c @@ -3,8 +3,8 @@ * Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */ #include -#include #include +#include #include #include "io_pagetable.h" diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 0bfacaf40c05..5d3768d77099 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -4,13 +4,14 @@ #ifndef __IOMMUFD_PRIVATE_H #define __IOMMUFD_PRIVATE_H -#include -#include -#include -#include #include #include +#include +#include +#include +#include #include + #include "../iommu-priv.h" struct iommu_domain; diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index acbbba1c6671..f4bc23a92f9a 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -4,8 +4,8 @@ #ifndef _UAPI_IOMMUFD_TEST_H #define _UAPI_IOMMUFD_TEST_H -#include #include +#include enum { IOMMU_TEST_OP_ADD_RESERVED = 1, diff --git a/drivers/iommu/iommufd/iova_bitmap.c b/drivers/iommu/iommufd/iova_bitmap.c index b9e964b1ad5c..d90b9e253412 100644 --- a/drivers/iommu/iommufd/iova_bitmap.c +++ b/drivers/iommu/iommufd/iova_bitmap.c @@ -3,10 +3,10 @@ * Copyright (c) 2022, Oracle and/or its affiliates. * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved */ +#include #include #include #include -#include #define BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE) diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c index 83bbd7c5d160..b5f5d27ee963 100644 --- a/drivers/iommu/iommufd/main.c +++ b/drivers/iommu/iommufd/main.c @@ -8,15 +8,15 @@ */ #define pr_fmt(fmt) "iommufd: " fmt +#include #include #include -#include -#include +#include #include +#include #include -#include +#include #include -#include #include "io_pagetable.h" #include "iommufd_private.h" diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index 117f644a0c5b..93d806c9c073 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -45,16 +45,16 @@ * last_iova + 1 can overflow. An iopt_pages index will always be much less than * ULONG_MAX so last_index + 1 cannot overflow. */ +#include +#include +#include +#include #include #include -#include #include -#include -#include -#include -#include "io_pagetable.h" #include "double_span.h" +#include "io_pagetable.h" #ifndef CONFIG_IOMMUFD_TEST #define TEMP_MEMORY_LIMIT 65536 diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index f95e32e29133..b60687f57bef 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -3,13 +3,13 @@ * * Kernel side components to support tools/testing/selftests/iommu */ -#include -#include -#include -#include #include #include +#include +#include #include +#include +#include #include #include "../iommu-priv.h" diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index ffc3a949f837..c2f2f6b9148e 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -6,9 +6,9 @@ #ifndef __LINUX_IOMMUFD_H #define __LINUX_IOMMUFD_H -#include -#include #include +#include +#include struct device; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2024 19:00:39.1482 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e9349ec6-1396-48ea-69dc-08dcb7133a68 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8306 From: Robin Murphy Currently, iommu-dma is the only place outside of IOMMUFD and drivers which might need to be aware of the stage 2 domain encapsulated within a nested domain. This would be still the RMR solution where we're using host-managed MSIs with an identity mapping at stage 1, where it is the underlying stage 2 domain which owns an MSI cookie and holds the corresponding dynamic mappings. Hook up the new op to resolve what we need from a nested domain. Signed-off-by: Robin Murphy Signed-off-by: Nicolin Chen --- drivers/iommu/dma-iommu.c | 18 ++++++++++++++++-- include/linux/iommu.h | 4 ++++ 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 7b1dfa0665df..5b21be04e04a 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1799,6 +1799,20 @@ static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev, return NULL; } +/* + * Nested domains may not have an MSI cookie or accept mappings, but they may + * be related to a domain which does, so we let them tell us what they need. + */ +static struct iommu_domain *iommu_dma_get_msi_mapping_domain(struct device *dev) +{ + struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + + if (domain && domain->type == IOMMU_DOMAIN_NESTED && + domain->ops && domain->ops->get_msi_mapping_domain) + domain = domain->ops->get_msi_mapping_domain(domain); + return domain; +} + /** * iommu_dma_prepare_msi() - Map the MSI page in the IOMMU domain * @desc: MSI descriptor, will store the MSI page @@ -1809,7 +1823,7 @@ static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev, int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) { struct device *dev = msi_desc_to_dev(desc); - struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + struct iommu_domain *domain = iommu_dma_get_msi_mapping_domain(dev); struct iommu_dma_msi_page *msi_page; static DEFINE_MUTEX(msi_prepare_lock); /* see below */ @@ -1842,7 +1856,7 @@ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg) { struct device *dev = msi_desc_to_dev(desc); - const struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + const struct iommu_domain *domain = iommu_dma_get_msi_mapping_domain(dev); const struct iommu_dma_msi_page *msi_page; msi_page = msi_desc_get_iommu_cookie(desc); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index b0323290cb6c..20a40fd6c4ba 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -684,6 +684,8 @@ struct iommu_ops { * specific mechanisms. * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*) * @free: Release the domain after use. + * @get_msi_mapping_domain: Return the related iommu_domain that should hold the + * MSI cookie and accept mapping(s). */ struct iommu_domain_ops { int (*attach_dev)(struct iommu_domain *domain, struct device *dev); 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Implement the get_msi_mapping_domain nested domain op to allow dma-iommu to find the correct paging domain. Add a new IOMMU_TEST_OP_MD_CHECK_SW_MSI to loopback test the MSI mapping using public dma-iommu and iommu helpers. Note that iommu_fwspec_init is a must for iommu_dma_get_resv_regions(). Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 4 + drivers/iommu/iommufd/selftest.c | 84 +++++++++++++++++++ tools/testing/selftests/iommu/iommufd_utils.h | 9 ++ 3 files changed, 97 insertions(+) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index f4bc23a92f9a..0bb30275a92f 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -23,6 +23,7 @@ enum { IOMMU_TEST_OP_DIRTY, IOMMU_TEST_OP_MD_CHECK_IOTLB, IOMMU_TEST_OP_TRIGGER_IOPF, + IOMMU_TEST_OP_MD_CHECK_SW_MSI, }; enum { @@ -135,6 +136,9 @@ struct iommu_test_cmd { __u32 perm; __u64 addr; } trigger_iopf; + struct { + __u32 stdev_id; + } check_sw_msi; }; __u32 last; }; diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index b60687f57bef..642ae135ada9 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -7,11 +7,13 @@ #include #include #include +#include #include #include #include #include +#include "../dma-iommu.h" #include "../iommu-priv.h" #include "io_pagetable.h" #include "iommufd_private.h" @@ -539,6 +541,24 @@ static int mock_dev_disable_feat(struct device *dev, enum iommu_dev_features fea return 0; } +#define MSI_IOVA_BASE 0x80000000 +#define MSI_IOVA_LENGTH 0x100000 + +static void mock_dev_get_resv_regions(struct device *dev, + struct list_head *head) +{ + int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO; + struct iommu_resv_region *region; + + region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH, + prot, IOMMU_RESV_SW_MSI, GFP_KERNEL); + if (!region) + return; + + list_add_tail(®ion->list, head); + iommu_dma_get_resv_regions(dev, head); +} + static const struct iommu_ops mock_ops = { /* * IOMMU_DOMAIN_BLOCKED cannot be returned from def_domain_type() @@ -557,6 +577,7 @@ static const struct iommu_ops mock_ops = { .page_response = mock_domain_page_response, .dev_enable_feat = mock_dev_enable_feat, .dev_disable_feat = mock_dev_disable_feat, + .get_resv_regions = mock_dev_get_resv_regions, .user_pasid_table = true, .default_domain_ops = &(struct iommu_domain_ops){ @@ -625,10 +646,20 @@ mock_domain_cache_invalidate_user(struct iommu_domain *domain, return rc; } +static struct iommu_domain * +mock_domain_get_msi_mapping_domain(struct iommu_domain *domain) +{ + struct mock_iommu_domain_nested *mock_nested = + container_of(domain, struct mock_iommu_domain_nested, domain); + + return &mock_nested->parent->domain; +} + static struct iommu_domain_ops domain_nested_ops = { .free = mock_domain_free_nested, .attach_dev = mock_domain_nop_attach, .cache_invalidate_user = mock_domain_cache_invalidate_user, + .get_msi_mapping_domain = mock_domain_get_msi_mapping_domain, }; static inline struct iommufd_hw_pagetable * @@ -701,6 +732,7 @@ static struct mock_dev *mock_dev_create(unsigned long dev_flags) return ERR_PTR(-ENOMEM); device_initialize(&mdev->dev); + iommu_fwspec_init(&mdev->dev, NULL); mdev->flags = dev_flags; mdev->dev.release = mock_dev_release; mdev->dev.bus = &iommufd_mock_bus_type.bus; @@ -960,6 +992,55 @@ static int iommufd_test_md_check_iotlb(struct iommufd_ucmd *ucmd, return rc; } +#define MOCK_MSI_PAGE 0xbeef0000 +static int iommufd_test_md_check_sw_msi(struct iommufd_ucmd *ucmd, + u32 mockpt_id, u32 device_id) +{ + struct mock_iommu_domain_nested *mock_nested; + struct iommufd_hw_pagetable *hwpt; + struct iommufd_object *dev_obj; + struct mock_iommu_domain *mock; + struct selftest_obj *sobj; + struct msi_desc desc = {}; + int rc = 0; + + hwpt = get_md_pagetable(ucmd, mockpt_id, &mock); + if (IS_ERR(hwpt)) { + /* Try nested domain */ + hwpt = get_md_pagetable_nested(ucmd, mockpt_id, &mock_nested); + if (IS_ERR(hwpt)) + return PTR_ERR(hwpt); + mock = mock_nested->parent; + } + + dev_obj = + iommufd_get_object(ucmd->ictx, device_id, IOMMUFD_OBJ_SELFTEST); + if (IS_ERR(dev_obj)) { + rc = PTR_ERR(dev_obj); + goto out_put_hwpt; + } + + sobj = container_of(dev_obj, struct selftest_obj, obj); + if (sobj->type != TYPE_IDEV) { + rc = -EINVAL; + goto out_dev_obj; + } + + desc.dev = sobj->idev.idev->dev; + rc = iommu_dma_prepare_msi(&desc, MOCK_MSI_PAGE); + if (rc) + goto out_dev_obj; + + if (iommu_iova_to_phys(&mock->domain, MSI_IOVA_BASE) != MOCK_MSI_PAGE) + rc = -EINVAL; + +out_dev_obj: + iommufd_put_object(ucmd->ictx, dev_obj); +out_put_hwpt: + iommufd_put_object(ucmd->ictx, &hwpt->obj); + return rc; +} + struct selftest_access { struct iommufd_access *access; struct file *file; @@ -1470,6 +1551,9 @@ int iommufd_test(struct iommufd_ucmd *ucmd) return iommufd_test_md_check_iotlb(ucmd, cmd->id, cmd->check_iotlb.id, cmd->check_iotlb.iotlb); + case IOMMU_TEST_OP_MD_CHECK_SW_MSI: + return iommufd_test_md_check_sw_msi(ucmd, cmd->id, + cmd->check_sw_msi.stdev_id); case IOMMU_TEST_OP_CREATE_ACCESS: return iommufd_test_create_access(ucmd, cmd->id, cmd->create_access.flags); diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index 40f6f14ce136..bc4556a48d82 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -130,6 +130,13 @@ static int _test_cmd_mock_domain_flags(int fd, unsigned int ioas_id, static int _test_cmd_mock_domain_replace(int fd, __u32 stdev_id, __u32 pt_id, __u32 *hwpt_id) { + struct iommu_test_cmd sw_msi = { + .size = sizeof(sw_msi), + .op = IOMMU_TEST_OP_MD_CHECK_SW_MSI, + .check_sw_msi = { + .stdev_id = stdev_id, + }, + }; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2024 19:00:43.8451 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7c785ad3-ef6c-4fad-b880-08dcb7133d32 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CDF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6004 In a 1-stage translation setup, a device is attached to a paging domain. In a 2-stage translation setup, a device is attached to a nested domain, which does not have the mappings for the MSI page but only an s2_parent paging domain pointer that holds the mappings. Add arm_smmu_get_msi_mapping_domain in arm_smmu_nested_ops to return the correct paging domain. Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 24836f3269b3..3962d5a55519 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3305,10 +3305,20 @@ static int arm_smmu_cache_invalidate_user(struct iommu_domain *domain, return ret; } +static struct iommu_domain * +arm_smmu_get_msi_mapping_domain(struct iommu_domain *domain) +{ + struct arm_smmu_nested_domain *nested_domain = + container_of(domain, struct arm_smmu_nested_domain, domain); + + return &nested_domain->s2_parent->domain; +} + static const struct iommu_domain_ops arm_smmu_nested_ops = { .attach_dev = arm_smmu_attach_dev_nested, .free = arm_smmu_domain_nested_free, .cache_invalidate_user = arm_smmu_cache_invalidate_user, + .get_msi_mapping_domain = arm_smmu_get_msi_mapping_domain, }; static struct iommu_domain *