| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. |
| */ |
| #ifndef _IOMMUFD_H |
| #define _IOMMUFD_H |
| |
| #include <linux/types.h> |
| #include <linux/ioctl.h> |
| |
| #define IOMMUFD_TYPE (';') |
| |
| /** |
| * DOC: General ioctl format |
| * |
| * The ioctl interface follows a general format to allow for extensibility. Each |
| * ioctl is passed in a structure pointer as the argument providing the size of |
| * the structure in the first u32. The kernel checks that any structure space |
| * beyond what it understands is 0. This allows userspace to use the backward |
| * compatible portion while consistently using the newer, larger, structures. |
| * |
| * ioctls use a standard meaning for common errnos: |
| * |
| * - ENOTTY: The IOCTL number itself is not supported at all |
| * - E2BIG: The IOCTL number is supported, but the provided structure has |
| * non-zero in a part the kernel does not understand. |
| * - EOPNOTSUPP: The IOCTL number is supported, and the structure is |
| * understood, however a known field has a value the kernel does not |
| * understand or support. |
| * - EINVAL: Everything about the IOCTL was understood, but a field is not |
| * correct. |
| * - ENOENT: An ID or IOVA provided does not exist. |
| * - ENOMEM: Out of memory. |
| * - EOVERFLOW: Mathematics overflowed. |
| * |
| * As well as additional errnos, within specific ioctls. |
| */ |
| enum { |
| IOMMUFD_CMD_BASE = 0x80, |
| IOMMUFD_CMD_DESTROY = IOMMUFD_CMD_BASE, |
| IOMMUFD_CMD_IOAS_ALLOC, |
| IOMMUFD_CMD_IOAS_ALLOW_IOVAS, |
| IOMMUFD_CMD_IOAS_COPY, |
| IOMMUFD_CMD_IOAS_IOVA_RANGES, |
| IOMMUFD_CMD_IOAS_MAP, |
| IOMMUFD_CMD_IOAS_UNMAP, |
| IOMMUFD_CMD_OPTION, |
| IOMMUFD_CMD_VFIO_IOAS, |
| IOMMUFD_CMD_HWPT_ALLOC, |
| IOMMUFD_CMD_GET_HW_INFO, |
| IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING, |
| IOMMUFD_CMD_HWPT_GET_DIRTY_BITMAP, |
| }; |
| |
| /** |
| * struct iommu_destroy - ioctl(IOMMU_DESTROY) |
| * @size: sizeof(struct iommu_destroy) |
| * @id: iommufd object ID to destroy. Can be any destroyable object type. |
| * |
| * Destroy any object held within iommufd. |
| */ |
| struct iommu_destroy { |
| __u32 size; |
| __u32 id; |
| }; |
| #define IOMMU_DESTROY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_DESTROY) |
| |
| /** |
| * struct iommu_ioas_alloc - ioctl(IOMMU_IOAS_ALLOC) |
| * @size: sizeof(struct iommu_ioas_alloc) |
| * @flags: Must be 0 |
| * @out_ioas_id: Output IOAS ID for the allocated object |
| * |
| * Allocate an IO Address Space (IOAS) which holds an IO Virtual Address (IOVA) |
| * to memory mapping. |
| */ |
| struct iommu_ioas_alloc { |
| __u32 size; |
| __u32 flags; |
| __u32 out_ioas_id; |
| }; |
| #define IOMMU_IOAS_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOC) |
| |
| /** |
| * struct iommu_iova_range - ioctl(IOMMU_IOVA_RANGE) |
| * @start: First IOVA |
| * @last: Inclusive last IOVA |
| * |
| * An interval in IOVA space. |
| */ |
| struct iommu_iova_range { |
| __aligned_u64 start; |
| __aligned_u64 last; |
| }; |
| |
| /** |
| * struct iommu_ioas_iova_ranges - ioctl(IOMMU_IOAS_IOVA_RANGES) |
| * @size: sizeof(struct iommu_ioas_iova_ranges) |
| * @ioas_id: IOAS ID to read ranges from |
| * @num_iovas: Input/Output total number of ranges in the IOAS |
| * @__reserved: Must be 0 |
| * @allowed_iovas: Pointer to the output array of struct iommu_iova_range |
| * @out_iova_alignment: Minimum alignment required for mapping IOVA |
| * |
| * Query an IOAS for ranges of allowed IOVAs. Mapping IOVA outside these ranges |
| * is not allowed. num_iovas will be set to the total number of iovas and |
| * the allowed_iovas[] will be filled in as space permits. |
| * |
| * The allowed ranges are dependent on the HW path the DMA operation takes, and |
| * can change during the lifetime of the IOAS. A fresh empty IOAS will have a |
| * full range, and each attached device will narrow the ranges based on that |
| * device's HW restrictions. Detaching a device can widen the ranges. Userspace |
| * should query ranges after every attach/detach to know what IOVAs are valid |
| * for mapping. |
| * |
| * On input num_iovas is the length of the allowed_iovas array. On output it is |
| * the total number of iovas filled in. The ioctl will return -EMSGSIZE and set |
| * num_iovas to the required value if num_iovas is too small. In this case the |
| * caller should allocate a larger output array and re-issue the ioctl. |
| * |
| * out_iova_alignment returns the minimum IOVA alignment that can be given |
| * to IOMMU_IOAS_MAP/COPY. IOVA's must satisfy:: |
| * |
| * starting_iova % out_iova_alignment == 0 |
| * (starting_iova + length) % out_iova_alignment == 0 |
| * |
| * out_iova_alignment can be 1 indicating any IOVA is allowed. It cannot |
| * be higher than the system PAGE_SIZE. |
| */ |
| struct iommu_ioas_iova_ranges { |
| __u32 size; |
| __u32 ioas_id; |
| __u32 num_iovas; |
| __u32 __reserved; |
| __aligned_u64 allowed_iovas; |
| __aligned_u64 out_iova_alignment; |
| }; |
| #define IOMMU_IOAS_IOVA_RANGES _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_IOVA_RANGES) |
| |
| /** |
| * struct iommu_ioas_allow_iovas - ioctl(IOMMU_IOAS_ALLOW_IOVAS) |
| * @size: sizeof(struct iommu_ioas_allow_iovas) |
| * @ioas_id: IOAS ID to allow IOVAs from |
| * @num_iovas: Input/Output total number of ranges in the IOAS |
| * @__reserved: Must be 0 |
| * @allowed_iovas: Pointer to array of struct iommu_iova_range |
| * |
| * Ensure a range of IOVAs are always available for allocation. If this call |
| * succeeds then IOMMU_IOAS_IOVA_RANGES will never return a list of IOVA ranges |
| * that are narrower than the ranges provided here. This call will fail if |
| * IOMMU_IOAS_IOVA_RANGES is currently narrower than the given ranges. |
| * |
| * When an IOAS is first created the IOVA_RANGES will be maximally sized, and as |
| * devices are attached the IOVA will narrow based on the device restrictions. |
| * When an allowed range is specified any narrowing will be refused, ie device |
| * attachment can fail if the device requires limiting within the allowed range. |
| * |
| * Automatic IOVA allocation is also impacted by this call. MAP will only |
| * allocate within the allowed IOVAs if they are present. |
| * |
| * This call replaces the entire allowed list with the given list. |
| */ |
| struct iommu_ioas_allow_iovas { |
| __u32 size; |
| __u32 ioas_id; |
| __u32 num_iovas; |
| __u32 __reserved; |
| __aligned_u64 allowed_iovas; |
| }; |
| #define IOMMU_IOAS_ALLOW_IOVAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOW_IOVAS) |
| |
| /** |
| * enum iommufd_ioas_map_flags - Flags for map and copy |
| * @IOMMU_IOAS_MAP_FIXED_IOVA: If clear the kernel will compute an appropriate |
| * IOVA to place the mapping at |
| * @IOMMU_IOAS_MAP_WRITEABLE: DMA is allowed to write to this mapping |
| * @IOMMU_IOAS_MAP_READABLE: DMA is allowed to read from this mapping |
| */ |
| enum iommufd_ioas_map_flags { |
| IOMMU_IOAS_MAP_FIXED_IOVA = 1 << 0, |
| IOMMU_IOAS_MAP_WRITEABLE = 1 << 1, |
| IOMMU_IOAS_MAP_READABLE = 1 << 2, |
| }; |
| |
| /** |
| * struct iommu_ioas_map - ioctl(IOMMU_IOAS_MAP) |
| * @size: sizeof(struct iommu_ioas_map) |
| * @flags: Combination of enum iommufd_ioas_map_flags |
| * @ioas_id: IOAS ID to change the mapping of |
| * @__reserved: Must be 0 |
| * @user_va: Userspace pointer to start mapping from |
| * @length: Number of bytes to map |
| * @iova: IOVA the mapping was placed at. If IOMMU_IOAS_MAP_FIXED_IOVA is set |
| * then this must be provided as input. |
| * |
| * Set an IOVA mapping from a user pointer. If FIXED_IOVA is specified then the |
| * mapping will be established at iova, otherwise a suitable location based on |
| * the reserved and allowed lists will be automatically selected and returned in |
| * iova. |
| * |
| * If IOMMU_IOAS_MAP_FIXED_IOVA is specified then the iova range must currently |
| * be unused, existing IOVA cannot be replaced. |
| */ |
| struct iommu_ioas_map { |
| __u32 size; |
| __u32 flags; |
| __u32 ioas_id; |
| __u32 __reserved; |
| __aligned_u64 user_va; |
| __aligned_u64 length; |
| __aligned_u64 iova; |
| }; |
| #define IOMMU_IOAS_MAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_MAP) |
| |
| /** |
| * struct iommu_ioas_copy - ioctl(IOMMU_IOAS_COPY) |
| * @size: sizeof(struct iommu_ioas_copy) |
| * @flags: Combination of enum iommufd_ioas_map_flags |
| * @dst_ioas_id: IOAS ID to change the mapping of |
| * @src_ioas_id: IOAS ID to copy from |
| * @length: Number of bytes to copy and map |
| * @dst_iova: IOVA the mapping was placed at. If IOMMU_IOAS_MAP_FIXED_IOVA is |
| * set then this must be provided as input. |
| * @src_iova: IOVA to start the copy |
| * |
| * Copy an already existing mapping from src_ioas_id and establish it in |
| * dst_ioas_id. The src iova/length must exactly match a range used with |
| * IOMMU_IOAS_MAP. |
| * |
| * This may be used to efficiently clone a subset of an IOAS to another, or as a |
| * kind of 'cache' to speed up mapping. Copy has an efficiency advantage over |
| * establishing equivalent new mappings, as internal resources are shared, and |
| * the kernel will pin the user memory only once. |
| */ |
| struct iommu_ioas_copy { |
| __u32 size; |
| __u32 flags; |
| __u32 dst_ioas_id; |
| __u32 src_ioas_id; |
| __aligned_u64 length; |
| __aligned_u64 dst_iova; |
| __aligned_u64 src_iova; |
| }; |
| #define IOMMU_IOAS_COPY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_COPY) |
| |
| /** |
| * struct iommu_ioas_unmap - ioctl(IOMMU_IOAS_UNMAP) |
| * @size: sizeof(struct iommu_ioas_unmap) |
| * @ioas_id: IOAS ID to change the mapping of |
| * @iova: IOVA to start the unmapping at |
| * @length: Number of bytes to unmap, and return back the bytes unmapped |
| * |
| * Unmap an IOVA range. The iova/length must be a superset of a previously |
| * mapped range used with IOMMU_IOAS_MAP or IOMMU_IOAS_COPY. Splitting or |
| * truncating ranges is not allowed. The values 0 to U64_MAX will unmap |
| * everything. |
| */ |
| struct iommu_ioas_unmap { |
| __u32 size; |
| __u32 ioas_id; |
| __aligned_u64 iova; |
| __aligned_u64 length; |
| }; |
| #define IOMMU_IOAS_UNMAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_UNMAP) |
| |
| /** |
| * enum iommufd_option - ioctl(IOMMU_OPTION_RLIMIT_MODE) and |
| * ioctl(IOMMU_OPTION_HUGE_PAGES) |
| * @IOMMU_OPTION_RLIMIT_MODE: |
| * Change how RLIMIT_MEMLOCK accounting works. The caller must have privilege |
| * to invoke this. Value 0 (default) is user based accouting, 1 uses process |
| * based accounting. Global option, object_id must be 0 |
| * @IOMMU_OPTION_HUGE_PAGES: |
| * Value 1 (default) allows contiguous pages to be combined when generating |
| * iommu mappings. Value 0 disables combining, everything is mapped to |
| * PAGE_SIZE. This can be useful for benchmarking. This is a per-IOAS |
| * option, the object_id must be the IOAS ID. |
| */ |
| enum iommufd_option { |
| IOMMU_OPTION_RLIMIT_MODE = 0, |
| IOMMU_OPTION_HUGE_PAGES = 1, |
| }; |
| |
| /** |
| * enum iommufd_option_ops - ioctl(IOMMU_OPTION_OP_SET) and |
| * ioctl(IOMMU_OPTION_OP_GET) |
| * @IOMMU_OPTION_OP_SET: Set the option's value |
| * @IOMMU_OPTION_OP_GET: Get the option's value |
| */ |
| enum iommufd_option_ops { |
| IOMMU_OPTION_OP_SET = 0, |
| IOMMU_OPTION_OP_GET = 1, |
| }; |
| |
| /** |
| * struct iommu_option - iommu option multiplexer |
| * @size: sizeof(struct iommu_option) |
| * @option_id: One of enum iommufd_option |
| * @op: One of enum iommufd_option_ops |
| * @__reserved: Must be 0 |
| * @object_id: ID of the object if required |
| * @val64: Option value to set or value returned on get |
| * |
| * Change a simple option value. This multiplexor allows controlling options |
| * on objects. IOMMU_OPTION_OP_SET will load an option and IOMMU_OPTION_OP_GET |
| * will return the current value. |
| */ |
| struct iommu_option { |
| __u32 size; |
| __u32 option_id; |
| __u16 op; |
| __u16 __reserved; |
| __u32 object_id; |
| __aligned_u64 val64; |
| }; |
| #define IOMMU_OPTION _IO(IOMMUFD_TYPE, IOMMUFD_CMD_OPTION) |
| |
| /** |
| * enum iommufd_vfio_ioas_op - IOMMU_VFIO_IOAS_* ioctls |
| * @IOMMU_VFIO_IOAS_GET: Get the current compatibility IOAS |
| * @IOMMU_VFIO_IOAS_SET: Change the current compatibility IOAS |
| * @IOMMU_VFIO_IOAS_CLEAR: Disable VFIO compatibility |
| */ |
| enum iommufd_vfio_ioas_op { |
| IOMMU_VFIO_IOAS_GET = 0, |
| IOMMU_VFIO_IOAS_SET = 1, |
| IOMMU_VFIO_IOAS_CLEAR = 2, |
| }; |
| |
| /** |
| * struct iommu_vfio_ioas - ioctl(IOMMU_VFIO_IOAS) |
| * @size: sizeof(struct iommu_vfio_ioas) |
| * @ioas_id: For IOMMU_VFIO_IOAS_SET the input IOAS ID to set |
| * For IOMMU_VFIO_IOAS_GET will output the IOAS ID |
| * @op: One of enum iommufd_vfio_ioas_op |
| * @__reserved: Must be 0 |
| * |
| * The VFIO compatibility support uses a single ioas because VFIO APIs do not |
| * support the ID field. Set or Get the IOAS that VFIO compatibility will use. |
| * When VFIO_GROUP_SET_CONTAINER is used on an iommufd it will get the |
| * compatibility ioas, either by taking what is already set, or auto creating |
| * one. From then on VFIO will continue to use that ioas and is not effected by |
| * this ioctl. SET or CLEAR does not destroy any auto-created IOAS. |
| */ |
| struct iommu_vfio_ioas { |
| __u32 size; |
| __u32 ioas_id; |
| __u16 op; |
| __u16 __reserved; |
| }; |
| #define IOMMU_VFIO_IOAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VFIO_IOAS) |
| |
| /** |
| * enum iommufd_hwpt_alloc_flags - Flags for HWPT allocation |
| * @IOMMU_HWPT_ALLOC_NEST_PARENT: If set, allocate a HWPT that can serve as |
| * the parent HWPT in a nesting configuration. |
| * @IOMMU_HWPT_ALLOC_DIRTY_TRACKING: Dirty tracking support for device IOMMU is |
| * enforced on device attachment |
| */ |
| enum iommufd_hwpt_alloc_flags { |
| IOMMU_HWPT_ALLOC_NEST_PARENT = 1 << 0, |
| IOMMU_HWPT_ALLOC_DIRTY_TRACKING = 1 << 1, |
| }; |
| |
| /** |
| * enum iommu_hwpt_vtd_s1_flags - Intel VT-d stage-1 page table |
| * entry attributes |
| * @IOMMU_VTD_S1_SRE: Supervisor request |
| * @IOMMU_VTD_S1_EAFE: Extended access enable |
| * @IOMMU_VTD_S1_WPE: Write protect enable |
| */ |
| enum iommu_hwpt_vtd_s1_flags { |
| IOMMU_VTD_S1_SRE = 1 << 0, |
| IOMMU_VTD_S1_EAFE = 1 << 1, |
| IOMMU_VTD_S1_WPE = 1 << 2, |
| }; |
| |
| /** |
| * struct iommu_hwpt_vtd_s1 - Intel VT-d stage-1 page table |
| * info (IOMMU_HWPT_DATA_VTD_S1) |
| * @flags: Combination of enum iommu_hwpt_vtd_s1_flags |
| * @pgtbl_addr: The base address of the stage-1 page table. |
| * @addr_width: The address width of the stage-1 page table |
| * @__reserved: Must be 0 |
| */ |
| struct iommu_hwpt_vtd_s1 { |
| __aligned_u64 flags; |
| __aligned_u64 pgtbl_addr; |
| __u32 addr_width; |
| __u32 __reserved; |
| }; |
| |
| /** |
| * enum iommu_hwpt_data_type - IOMMU HWPT Data Type |
| * @IOMMU_HWPT_DATA_NONE: no data |
| * @IOMMU_HWPT_DATA_VTD_S1: Intel VT-d stage-1 page table |
| */ |
| enum iommu_hwpt_data_type { |
| IOMMU_HWPT_DATA_NONE, |
| IOMMU_HWPT_DATA_VTD_S1, |
| }; |
| |
| /** |
| * struct iommu_hwpt_alloc - ioctl(IOMMU_HWPT_ALLOC) |
| * @size: sizeof(struct iommu_hwpt_alloc) |
| * @flags: Combination of enum iommufd_hwpt_alloc_flags |
| * @dev_id: The device to allocate this HWPT for |
| * @pt_id: The IOAS or HWPT to connect this HWPT to |
| * @out_hwpt_id: The ID of the new HWPT |
| * @__reserved: Must be 0 |
| * @data_type: One of enum iommu_hwpt_data_type |
| * @data_len: Length of the type specific data |
| * @data_uptr: User pointer to the type specific data |
| * |
| * Explicitly allocate a hardware page table object. This is the same object |
| * type that is returned by iommufd_device_attach() and represents the |
| * underlying iommu driver's iommu_domain kernel object. |
| * |
| * A kernel-managed HWPT will be created with the mappings from the given |
| * IOAS via the @pt_id. The @data_type for this allocation must be set to |
| * IOMMU_HWPT_DATA_NONE. The HWPT can be allocated as a parent HWPT for a |
| * nesting configuration by passing IOMMU_HWPT_ALLOC_NEST_PARENT via @flags. |
| * |
| * A user-managed nested HWPT will be created from a given parent HWPT via |
| * @pt_id, in which the parent HWPT must be allocated previously via the |
| * same ioctl from a given IOAS (@pt_id). In this case, the @data_type |
| * must be set to a pre-defined type corresponding to an I/O page table |
| * type supported by the underlying IOMMU hardware. |
| * |
| * If the @data_type is set to IOMMU_HWPT_DATA_NONE, @data_len and |
| * @data_uptr should be zero. Otherwise, both @data_len and @data_uptr |
| * must be given. |
| */ |
| struct iommu_hwpt_alloc { |
| __u32 size; |
| __u32 flags; |
| __u32 dev_id; |
| __u32 pt_id; |
| __u32 out_hwpt_id; |
| __u32 __reserved; |
| __u32 data_type; |
| __u32 data_len; |
| __aligned_u64 data_uptr; |
| }; |
| #define IOMMU_HWPT_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HWPT_ALLOC) |
| |
| /** |
| * enum iommu_hw_info_vtd_flags - Flags for VT-d hw_info |
| * @IOMMU_HW_INFO_VTD_ERRATA_772415_SPR17: If set, disallow read-only mappings |
| * on a nested_parent domain. |
| * https://www.intel.com/content/www/us/en/content-details/772415/content-details.html |
| */ |
| enum iommu_hw_info_vtd_flags { |
| IOMMU_HW_INFO_VTD_ERRATA_772415_SPR17 = 1 << 0, |
| }; |
| |
| /** |
| * struct iommu_hw_info_vtd - Intel VT-d hardware information |
| * |
| * @flags: Combination of enum iommu_hw_info_vtd_flags |
| * @__reserved: Must be 0 |
| * |
| * @cap_reg: Value of Intel VT-d capability register defined in VT-d spec |
| * section 11.4.2 Capability Register. |
| * @ecap_reg: Value of Intel VT-d capability register defined in VT-d spec |
| * section 11.4.3 Extended Capability Register. |
| * |
| * User needs to understand the Intel VT-d specification to decode the |
| * register value. |
| */ |
| struct iommu_hw_info_vtd { |
| __u32 flags; |
| __u32 __reserved; |
| __aligned_u64 cap_reg; |
| __aligned_u64 ecap_reg; |
| }; |
| |
| /** |
| * enum iommu_hw_info_type - IOMMU Hardware Info Types |
| * @IOMMU_HW_INFO_TYPE_NONE: Used by the drivers that do not report hardware |
| * info |
| * @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type |
| */ |
| enum iommu_hw_info_type { |
| IOMMU_HW_INFO_TYPE_NONE, |
| IOMMU_HW_INFO_TYPE_INTEL_VTD, |
| }; |
| |
| /** |
| * enum iommufd_hw_capabilities |
| * @IOMMU_HW_CAP_DIRTY_TRACKING: IOMMU hardware support for dirty tracking |
| * If available, it means the following APIs |
| * are supported: |
| * |
| * IOMMU_HWPT_GET_DIRTY_BITMAP |
| * IOMMU_HWPT_SET_DIRTY_TRACKING |
| * |
| */ |
| enum iommufd_hw_capabilities { |
| IOMMU_HW_CAP_DIRTY_TRACKING = 1 << 0, |
| }; |
| |
| /** |
| * struct iommu_hw_info - ioctl(IOMMU_GET_HW_INFO) |
| * @size: sizeof(struct iommu_hw_info) |
| * @flags: Must be 0 |
| * @dev_id: The device bound to the iommufd |
| * @data_len: Input the length of a user buffer in bytes. Output the length of |
| * data that kernel supports |
| * @data_uptr: User pointer to a user-space buffer used by the kernel to fill |
| * the iommu type specific hardware information data |
| * @out_data_type: Output the iommu hardware info type as defined in the enum |
| * iommu_hw_info_type. |
| * @out_capabilities: Output the generic iommu capability info type as defined |
| * in the enum iommu_hw_capabilities. |
| * @__reserved: Must be 0 |
| * |
| * Query an iommu type specific hardware information data from an iommu behind |
| * a given device that has been bound to iommufd. This hardware info data will |
| * be used to sync capabilities between the virtual iommu and the physical |
| * iommu, e.g. a nested translation setup needs to check the hardware info, so |
| * a guest stage-1 page table can be compatible with the physical iommu. |
| * |
| * To capture an iommu type specific hardware information data, @data_uptr and |
| * its length @data_len must be provided. Trailing bytes will be zeroed if the |
| * user buffer is larger than the data that kernel has. Otherwise, kernel only |
| * fills the buffer using the given length in @data_len. If the ioctl succeeds, |
| * @data_len will be updated to the length that kernel actually supports, |
| * @out_data_type will be filled to decode the data filled in the buffer |
| * pointed by @data_uptr. Input @data_len == zero is allowed. |
| */ |
| struct iommu_hw_info { |
| __u32 size; |
| __u32 flags; |
| __u32 dev_id; |
| __u32 data_len; |
| __aligned_u64 data_uptr; |
| __u32 out_data_type; |
| __u32 __reserved; |
| __aligned_u64 out_capabilities; |
| }; |
| #define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO) |
| |
| /* |
| * enum iommufd_hwpt_set_dirty_tracking_flags - Flags for steering dirty |
| * tracking |
| * @IOMMU_HWPT_DIRTY_TRACKING_ENABLE: Enable dirty tracking |
| */ |
| enum iommufd_hwpt_set_dirty_tracking_flags { |
| IOMMU_HWPT_DIRTY_TRACKING_ENABLE = 1, |
| }; |
| |
| /** |
| * struct iommu_hwpt_set_dirty_tracking - ioctl(IOMMU_HWPT_SET_DIRTY_TRACKING) |
| * @size: sizeof(struct iommu_hwpt_set_dirty_tracking) |
| * @flags: Combination of enum iommufd_hwpt_set_dirty_tracking_flags |
| * @hwpt_id: HW pagetable ID that represents the IOMMU domain |
| * @__reserved: Must be 0 |
| * |
| * Toggle dirty tracking on an HW pagetable. |
| */ |
| struct iommu_hwpt_set_dirty_tracking { |
| __u32 size; |
| __u32 flags; |
| __u32 hwpt_id; |
| __u32 __reserved; |
| }; |
| #define IOMMU_HWPT_SET_DIRTY_TRACKING _IO(IOMMUFD_TYPE, \ |
| IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING) |
| |
| /** |
| * enum iommufd_hwpt_get_dirty_bitmap_flags - Flags for getting dirty bits |
| * @IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR: Just read the PTEs without clearing |
| * any dirty bits metadata. This flag |
| * can be passed in the expectation |
| * where the next operation is an unmap |
| * of the same IOVA range. |
| * |
| */ |
| enum iommufd_hwpt_get_dirty_bitmap_flags { |
| IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR = 1, |
| }; |
| |
| /** |
| * struct iommu_hwpt_get_dirty_bitmap - ioctl(IOMMU_HWPT_GET_DIRTY_BITMAP) |
| * @size: sizeof(struct iommu_hwpt_get_dirty_bitmap) |
| * @hwpt_id: HW pagetable ID that represents the IOMMU domain |
| * @flags: Combination of enum iommufd_hwpt_get_dirty_bitmap_flags |
| * @__reserved: Must be 0 |
| * @iova: base IOVA of the bitmap first bit |
| * @length: IOVA range size |
| * @page_size: page size granularity of each bit in the bitmap |
| * @data: bitmap where to set the dirty bits. The bitmap bits each |
| * represent a page_size which you deviate from an arbitrary iova. |
| * |
| * Checking a given IOVA is dirty: |
| * |
| * data[(iova / page_size) / 64] & (1ULL << ((iova / page_size) % 64)) |
| * |
| * Walk the IOMMU pagetables for a given IOVA range to return a bitmap |
| * with the dirty IOVAs. In doing so it will also by default clear any |
| * dirty bit metadata set in the IOPTE. |
| */ |
| struct iommu_hwpt_get_dirty_bitmap { |
| __u32 size; |
| __u32 hwpt_id; |
| __u32 flags; |
| __u32 __reserved; |
| __aligned_u64 iova; |
| __aligned_u64 length; |
| __aligned_u64 page_size; |
| __aligned_u64 data; |
| }; |
| #define IOMMU_HWPT_GET_DIRTY_BITMAP _IO(IOMMUFD_TYPE, \ |
| IOMMUFD_CMD_HWPT_GET_DIRTY_BITMAP) |
| |
| #endif |
