Pull iommu updates from Joerg Roedel: - Make the dma-iommu code more generic so that it can be used outside of the ARM context with other IOMMU drivers. Goal is to make use of it on x86 too. - Generic IOMMU domain support for the Intel VT-d driver. This driver now makes more use of common IOMMU code to allocate default domains for the devices it handles. - An IOMMU fault reporting API to userspace. With that the IOMMU fault handling can be done in user-space, for example to forward the faults to a VM. - Better handling for reserved regions requested by the firmware. These can be 'relaxed' now, meaning that those don't prevent a device being attached to a VM. - Suspend/Resume support for the Renesas IOMMU driver. - Added support for dumping SVA related fields of the DMAR table in the Intel VT-d driver via debugfs. - A pile of smaller fixes and cleanups. * tag 'iommu-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (90 commits) iommu/omap: No need to check return value of debugfs_create functions iommu/arm-smmu-v3: Invalidate ATC when detaching a device iommu/arm-smmu-v3: Fix compilation when CONFIG_CMA=n iommu/vt-d: Cleanup unused variable iommu/amd: Flush not present cache in iommu_map_page iommu/amd: Only free resources once on init error iommu/amd: Move gart fallback to amd_iommu_init iommu/amd: Make iommu_disable safer iommu/io-pgtable: Support non-coherent page tables iommu/io-pgtable: Replace IO_PGTABLE_QUIRK_NO_DMA with specific flag iommu/io-pgtable-arm: Add support to use system cache iommu/arm-smmu-v3: Increase maximum size of queues iommu/vt-d: Silence a variable set but not used iommu/vt-d: Remove an unused variable "length" iommu: Fix integer truncation iommu: Add padding to struct iommu_fault iommu/vt-d: Consolidate domain_init() to avoid duplication iommu/vt-d: Cleanup after delegating DMA domain to generic iommu iommu/vt-d: Fix suspicious RCU usage in probe_acpi_namespace_devices() iommu/vt-d: Allow DMA domain attaching to rmrr locked device ...
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| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | ||
| 2 | /* | ||
| 3 | * IOMMU user API definitions | ||
| 4 | */ | ||
| 5 | |||
| 6 | #ifndef _UAPI_IOMMU_H | ||
| 7 | #define _UAPI_IOMMU_H | ||
| 8 | |||
| 9 | #include <linux/types.h> | ||
| 10 | |||
| 11 | #define IOMMU_FAULT_PERM_READ (1 << 0) /* read */ | ||
| 12 | #define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */ | ||
| 13 | #define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */ | ||
| 14 | #define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */ | ||
| 15 | |||
| 16 | /* Generic fault types, can be expanded IRQ remapping fault */ | ||
| 17 | enum iommu_fault_type { | ||
| 18 | IOMMU_FAULT_DMA_UNRECOV = 1, /* unrecoverable fault */ | ||
| 19 | IOMMU_FAULT_PAGE_REQ, /* page request fault */ | ||
| 20 | }; | ||
| 21 | |||
| 22 | enum iommu_fault_reason { | ||
| 23 | IOMMU_FAULT_REASON_UNKNOWN = 0, | ||
| 24 | |||
| 25 | /* Could not access the PASID table (fetch caused external abort) */ | ||
| 26 | IOMMU_FAULT_REASON_PASID_FETCH, | ||
| 27 | |||
| 28 | /* PASID entry is invalid or has configuration errors */ | ||
| 29 | IOMMU_FAULT_REASON_BAD_PASID_ENTRY, | ||
| 30 | |||
| 31 | /* | ||
| 32 | * PASID is out of range (e.g. exceeds the maximum PASID | ||
| 33 | * supported by the IOMMU) or disabled. | ||
| 34 | */ | ||
| 35 | IOMMU_FAULT_REASON_PASID_INVALID, | ||
| 36 | |||
| 37 | /* | ||
| 38 | * An external abort occurred fetching (or updating) a translation | ||
| 39 | * table descriptor | ||
| 40 | */ | ||
| 41 | IOMMU_FAULT_REASON_WALK_EABT, | ||
| 42 | |||
| 43 | /* | ||
| 44 | * Could not access the page table entry (Bad address), | ||
| 45 | * actual translation fault | ||
| 46 | */ | ||
| 47 | IOMMU_FAULT_REASON_PTE_FETCH, | ||
| 48 | |||
| 49 | /* Protection flag check failed */ | ||
| 50 | IOMMU_FAULT_REASON_PERMISSION, | ||
| 51 | |||
| 52 | /* access flag check failed */ | ||
| 53 | IOMMU_FAULT_REASON_ACCESS, | ||
| 54 | |||
| 55 | /* Output address of a translation stage caused Address Size fault */ | ||
| 56 | IOMMU_FAULT_REASON_OOR_ADDRESS, | ||
| 57 | }; | ||
| 58 | |||
| 59 | /** | ||
| 60 | * struct iommu_fault_unrecoverable - Unrecoverable fault data | ||
| 61 | * @reason: reason of the fault, from &enum iommu_fault_reason | ||
| 62 | * @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values) | ||
| 63 | * @pasid: Process Address Space ID | ||
| 64 | * @perm: requested permission access using by the incoming transaction | ||
| 65 | * (IOMMU_FAULT_PERM_* values) | ||
| 66 | * @addr: offending page address | ||
| 67 | * @fetch_addr: address that caused a fetch abort, if any | ||
| 68 | */ | ||
| 69 | struct iommu_fault_unrecoverable { | ||
| 70 | __u32 reason; | ||
| 71 | #define IOMMU_FAULT_UNRECOV_PASID_VALID (1 << 0) | ||
| 72 | #define IOMMU_FAULT_UNRECOV_ADDR_VALID (1 << 1) | ||
| 73 | #define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID (1 << 2) | ||
| 74 | __u32 flags; | ||
| 75 | __u32 pasid; | ||
| 76 | __u32 perm; | ||
| 77 | __u64 addr; | ||
| 78 | __u64 fetch_addr; | ||
| 79 | }; | ||
| 80 | |||
| 81 | /** | ||
| 82 | * struct iommu_fault_page_request - Page Request data | ||
| 83 | * @flags: encodes whether the corresponding fields are valid and whether this | ||
| 84 | * is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values) | ||
| 85 | * @pasid: Process Address Space ID | ||
| 86 | * @grpid: Page Request Group Index | ||
| 87 | * @perm: requested page permissions (IOMMU_FAULT_PERM_* values) | ||
| 88 | * @addr: page address | ||
| 89 | * @private_data: device-specific private information | ||
| 90 | */ | ||
| 91 | struct iommu_fault_page_request { | ||
| 92 | #define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0) | ||
| 93 | #define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1) | ||
| 94 | #define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2) | ||
| 95 | __u32 flags; | ||
| 96 | __u32 pasid; | ||
| 97 | __u32 grpid; | ||
| 98 | __u32 perm; | ||
| 99 | __u64 addr; | ||
| 100 | __u64 private_data[2]; | ||
| 101 | }; | ||
| 102 | |||
| 103 | /** | ||
| 104 | * struct iommu_fault - Generic fault data | ||
| 105 | * @type: fault type from &enum iommu_fault_type | ||
| 106 | * @padding: reserved for future use (should be zero) | ||
| 107 | * @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV | ||
| 108 | * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ | ||
| 109 | * @padding2: sets the fault size to allow for future extensions | ||
| 110 | */ | ||
| 111 | struct iommu_fault { | ||
| 112 | __u32 type; | ||
| 113 | __u32 padding; | ||
| 114 | union { | ||
| 115 | struct iommu_fault_unrecoverable event; | ||
| 116 | struct iommu_fault_page_request prm; | ||
| 117 | __u8 padding2[56]; | ||
| 118 | }; | ||
| 119 | }; | ||
| 120 | |||
| 121 | /** | ||
| 122 | * enum iommu_page_response_code - Return status of fault handlers | ||
| 123 | * @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables | ||
| 124 | * populated, retry the access. This is "Success" in PCI PRI. | ||
| 125 | * @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from | ||
| 126 | * this device if possible. This is "Response Failure" in PCI PRI. | ||
| 127 | * @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the | ||
| 128 | * access. This is "Invalid Request" in PCI PRI. | ||
| 129 | */ | ||
| 130 | enum iommu_page_response_code { | ||
| 131 | IOMMU_PAGE_RESP_SUCCESS = 0, | ||
| 132 | IOMMU_PAGE_RESP_INVALID, | ||
| 133 | IOMMU_PAGE_RESP_FAILURE, | ||
| 134 | }; | ||
| 135 | |||
| 136 | /** | ||
| 137 | * struct iommu_page_response - Generic page response information | ||
| 138 | * @version: API version of this structure | ||
| 139 | * @flags: encodes whether the corresponding fields are valid | ||
| 140 | * (IOMMU_FAULT_PAGE_RESPONSE_* values) | ||
| 141 | * @pasid: Process Address Space ID | ||
| 142 | * @grpid: Page Request Group Index | ||
| 143 | * @code: response code from &enum iommu_page_response_code | ||
| 144 | */ | ||
| 145 | struct iommu_page_response { | ||
| 146 | #define IOMMU_PAGE_RESP_VERSION_1 1 | ||
| 147 | __u32 version; | ||
| 148 | #define IOMMU_PAGE_RESP_PASID_VALID (1 << 0) | ||
| 149 | __u32 flags; | ||
| 150 | __u32 pasid; | ||
| 151 | __u32 grpid; | ||
| 152 | __u32 code; | ||
| 153 | }; | ||
| 154 | |||
| 155 | #endif /* _UAPI_IOMMU_H */ | ||