/** * 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 = 0x81,
IOMMUFD_CMD_IOAS_ALLOW_IOVAS = 0x82,
IOMMUFD_CMD_IOAS_COPY = 0x83,
IOMMUFD_CMD_IOAS_IOVA_RANGES = 0x84,
IOMMUFD_CMD_IOAS_MAP = 0x85,
IOMMUFD_CMD_IOAS_UNMAP = 0x86,
IOMMUFD_CMD_OPTION = 0x87,
IOMMUFD_CMD_VFIO_IOAS = 0x88,
IOMMUFD_CMD_HWPT_ALLOC = 0x89,
IOMMUFD_CMD_GET_HW_INFO = 0x8a,
IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING = 0x8b,
IOMMUFD_CMD_HWPT_GET_DIRTY_BITMAP = 0x8c,
IOMMUFD_CMD_HWPT_INVALIDATE = 0x8d,
IOMMUFD_CMD_FAULT_QUEUE_ALLOC = 0x8e,
IOMMUFD_CMD_IOAS_MAP_FILE = 0x8f,
IOMMUFD_CMD_VIOMMU_ALLOC = 0x90,
IOMMUFD_CMD_VDEVICE_ALLOC = 0x91,
IOMMUFD_CMD_IOAS_CHANGE_PROCESS = 0x92,
IOMMUFD_CMD_VEVENTQ_ALLOC = 0x93,
IOMMUFD_CMD_HW_QUEUE_ALLOC = 0x94,
};
/** * 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_map_file - ioctl(IOMMU_IOAS_MAP_FILE) * @size: sizeof(struct iommu_ioas_map_file) * @flags: same as for iommu_ioas_map * @ioas_id: same as for iommu_ioas_map * @fd: the memfd to map * @start: byte offset from start of file to map from * @length: same as for iommu_ioas_map * @iova: same as for iommu_ioas_map * * Set an IOVA mapping from a memfd file. All other arguments and semantics * match those of IOMMU_IOAS_MAP.
*/ struct iommu_ioas_map_file {
__u32 size;
__u32 flags;
__u32 ioas_id;
__s32 fd;
__aligned_u64 start;
__aligned_u64 length;
__aligned_u64 iova;
}; #define IOMMU_IOAS_MAP_FILE _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_MAP_FILE)
/** * 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 accounting, 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 * @IOMMU_HWPT_FAULT_ID_VALID: The fault_id field of hwpt allocation data is * valid. * @IOMMU_HWPT_ALLOC_PASID: Requests a domain that can be used with PASID. The * domain can be attached to any PASID on the device. * Any domain attached to the non-PASID part of the * device must also be flagged, otherwise attaching a * PASID will blocked. * For the user that wants to attach PASID, ioas is * not recommended for both the non-PASID part * and PASID part of the device. * If IOMMU does not support PASID it will return * error (-EOPNOTSUPP).
*/ enum iommufd_hwpt_alloc_flags {
IOMMU_HWPT_ALLOC_NEST_PARENT = 1 << 0,
IOMMU_HWPT_ALLOC_DIRTY_TRACKING = 1 << 1,
IOMMU_HWPT_FAULT_ID_VALID = 1 << 2,
IOMMU_HWPT_ALLOC_PASID = 1 << 3,
};
/** * 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;
};
/** * struct iommu_hwpt_arm_smmuv3 - ARM SMMUv3 nested STE * (IOMMU_HWPT_DATA_ARM_SMMUV3) * * @ste: The first two double words of the user space Stream Table Entry for * the translation. Must be little-endian. * Allowed fields: (Refer to "5.2 Stream Table Entry" in SMMUv3 HW Spec) * - word-0: V, Cfg, S1Fmt, S1ContextPtr, S1CDMax * - word-1: EATS, S1DSS, S1CIR, S1COR, S1CSH, S1STALLD * * -EIO will be returned if @ste is not legal or contains any non-allowed field. * Cfg can be used to select a S1, Bypass or Abort configuration. A Bypass * nested domain will translate the same as the nesting parent. The S1 will * install a Context Descriptor Table pointing at userspace memory translated * by the nesting parent.
*/ struct iommu_hwpt_arm_smmuv3 {
__aligned_le64 ste[2];
};
/** * 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 * @IOMMU_HWPT_DATA_ARM_SMMUV3: ARM SMMUv3 Context Descriptor Table
*/ enum iommu_hwpt_data_type {
IOMMU_HWPT_DATA_NONE = 0,
IOMMU_HWPT_DATA_VTD_S1 = 1,
IOMMU_HWPT_DATA_ARM_SMMUV3 = 2,
};
/** * 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 or vIOMMU 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 * @fault_id: The ID of IOMMUFD_FAULT object. Valid only if flags field of * IOMMU_HWPT_FAULT_ID_VALID is set. * @__reserved2: Padding to 64-bit alignment. Must be 0. * * 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 vIOMMU (wrapping a * parent HWPT) or a 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. The device * via @dev_id and the vIOMMU via @pt_id must be associated to the same IOMMU * instance. * * 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;
__u32 fault_id;
__u32 __reserved2;
}; #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;
};
/** * struct iommu_hw_info_arm_smmuv3 - ARM SMMUv3 hardware information * (IOMMU_HW_INFO_TYPE_ARM_SMMUV3) * * @flags: Must be set to 0 * @__reserved: Must be 0 * @idr: Implemented features for ARM SMMU Non-secure programming interface * @iidr: Information about the implementation and implementer of ARM SMMU, * and architecture version supported * @aidr: ARM SMMU architecture version * * For the details of @idr, @iidr and @aidr, please refer to the chapters * from 6.3.1 to 6.3.6 in the SMMUv3 Spec. * * This reports the raw HW capability, and not all bits are meaningful to be * read by userspace. Only the following fields should be used: * * idr[0]: ST_LEVEL, TERM_MODEL, STALL_MODEL, TTENDIAN , CD2L, ASID16, TTF * idr[1]: SIDSIZE, SSIDSIZE * idr[3]: BBML, RIL * idr[5]: VAX, GRAN64K, GRAN16K, GRAN4K * * - S1P should be assumed to be true if a NESTED HWPT can be created * - VFIO/iommufd only support platforms with COHACC, it should be assumed to be * true. * - ATS is a per-device property. If the VMM describes any devices as ATS * capable in ACPI/DT it should set the corresponding idr. * * This list may expand in future (eg E0PD, AIE, PBHA, D128, DS etc). It is * important that VMMs do not read bits outside the list to allow for * compatibility with future kernels. Several features in the SMMUv3 * architecture are not currently supported by the kernel for nesting: HTTU, * BTM, MPAM and others.
*/ struct iommu_hw_info_arm_smmuv3 {
__u32 flags;
__u32 __reserved;
__u32 idr[6];
__u32 iidr;
__u32 aidr;
};
/** * struct iommu_hw_info_tegra241_cmdqv - NVIDIA Tegra241 CMDQV Hardware * Information (IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV) * * @flags: Must be 0 * @version: Version number for the CMDQ-V HW for PARAM bits[03:00] * @log2vcmdqs: Log2 of the total number of VCMDQs for PARAM bits[07:04] * @log2vsids: Log2 of the total number of SID replacements for PARAM bits[15:12] * @__reserved: Must be 0 * * VMM can use these fields directly in its emulated global PARAM register. Note * that only one Virtual Interface (VINTF) should be exposed to a VM, i.e. PARAM * bits[11:08] should be set to 0 for log2 of the total number of VINTFs.
*/ struct iommu_hw_info_tegra241_cmdqv {
__u32 flags;
__u8 version;
__u8 log2vcmdqs;
__u8 log2vsids;
__u8 __reserved;
};
/** * enum iommu_hw_info_type - IOMMU Hardware Info Types * @IOMMU_HW_INFO_TYPE_NONE: Output by the drivers that do not report hardware * info * @IOMMU_HW_INFO_TYPE_DEFAULT: Input to request for a default type * @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type * @IOMMU_HW_INFO_TYPE_ARM_SMMUV3: ARM SMMUv3 iommu info type * @IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for ARM * SMMUv3) info type
*/ enum iommu_hw_info_type {
IOMMU_HW_INFO_TYPE_NONE = 0,
IOMMU_HW_INFO_TYPE_DEFAULT = 0,
IOMMU_HW_INFO_TYPE_INTEL_VTD = 1,
IOMMU_HW_INFO_TYPE_ARM_SMMUV3 = 2,
IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV = 3,
};
/** * 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 * * @IOMMU_HW_CAP_PCI_PASID_EXEC: Execute Permission Supported, user ignores it * when the struct * iommu_hw_info::out_max_pasid_log2 is zero. * @IOMMU_HW_CAP_PCI_PASID_PRIV: Privileged Mode Supported, user ignores it * when the struct * iommu_hw_info::out_max_pasid_log2 is zero.
*/ enum iommufd_hw_capabilities {
IOMMU_HW_CAP_DIRTY_TRACKING = 1 << 0,
IOMMU_HW_CAP_PCI_PASID_EXEC = 1 << 1,
IOMMU_HW_CAP_PCI_PASID_PRIV = 1 << 2,
};
/** * enum iommufd_hw_info_flags - Flags for iommu_hw_info * @IOMMU_HW_INFO_FLAG_INPUT_TYPE: If set, @in_data_type carries an input type * for user space to request for a specific info
*/ enum iommufd_hw_info_flags {
IOMMU_HW_INFO_FLAG_INPUT_TYPE = 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 * @in_data_type: This shares the same field with @out_data_type, making it be * a bidirectional field. When IOMMU_HW_INFO_FLAG_INPUT_TYPE is * set, an input type carried via this @in_data_type field will * be valid, requesting for the info data to the given type. If * IOMMU_HW_INFO_FLAG_INPUT_TYPE is unset, any input value will * be seen as IOMMU_HW_INFO_TYPE_DEFAULT * @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. * @out_max_pasid_log2: Output the width of PASIDs. 0 means no PASID support. * PCI devices turn to out_capabilities to check if the * specific capabilities is supported or not. * @__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; union {
__u32 in_data_type;
__u32 out_data_type;
};
__u8 out_max_pasid_log2;
__u8 __reserved[3];
__aligned_u64 out_capabilities;
}; #define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO)
/** * 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)
/** * enum iommu_hwpt_invalidate_data_type - IOMMU HWPT Cache Invalidation * Data Type * @IOMMU_HWPT_INVALIDATE_DATA_VTD_S1: Invalidation data for VTD_S1 * @IOMMU_VIOMMU_INVALIDATE_DATA_ARM_SMMUV3: Invalidation data for ARM SMMUv3
*/ enum iommu_hwpt_invalidate_data_type {
IOMMU_HWPT_INVALIDATE_DATA_VTD_S1 = 0,
IOMMU_VIOMMU_INVALIDATE_DATA_ARM_SMMUV3 = 1,
};
/** * enum iommu_hwpt_vtd_s1_invalidate_flags - Flags for Intel VT-d * stage-1 cache invalidation * @IOMMU_VTD_INV_FLAGS_LEAF: Indicates whether the invalidation applies * to all-levels page structure cache or just * the leaf PTE cache.
*/ enum iommu_hwpt_vtd_s1_invalidate_flags {
IOMMU_VTD_INV_FLAGS_LEAF = 1 << 0,
};
/** * struct iommu_hwpt_vtd_s1_invalidate - Intel VT-d cache invalidation * (IOMMU_HWPT_INVALIDATE_DATA_VTD_S1) * @addr: The start address of the range to be invalidated. It needs to * be 4KB aligned. * @npages: Number of contiguous 4K pages to be invalidated. * @flags: Combination of enum iommu_hwpt_vtd_s1_invalidate_flags * @__reserved: Must be 0 * * The Intel VT-d specific invalidation data for user-managed stage-1 cache * invalidation in nested translation. Userspace uses this structure to * tell the impacted cache scope after modifying the stage-1 page table. * * Invalidating all the caches related to the page table by setting @addr * to be 0 and @npages to be U64_MAX. * * The device TLB will be invalidated automatically if ATS is enabled.
*/ struct iommu_hwpt_vtd_s1_invalidate {
__aligned_u64 addr;
__aligned_u64 npages;
__u32 flags;
__u32 __reserved;
};
/** * struct iommu_viommu_arm_smmuv3_invalidate - ARM SMMUv3 cache invalidation * (IOMMU_VIOMMU_INVALIDATE_DATA_ARM_SMMUV3) * @cmd: 128-bit cache invalidation command that runs in SMMU CMDQ. * Must be little-endian. * * Supported command list only when passing in a vIOMMU via @hwpt_id: * CMDQ_OP_TLBI_NSNH_ALL * CMDQ_OP_TLBI_NH_VA * CMDQ_OP_TLBI_NH_VAA * CMDQ_OP_TLBI_NH_ALL * CMDQ_OP_TLBI_NH_ASID * CMDQ_OP_ATC_INV * CMDQ_OP_CFGI_CD * CMDQ_OP_CFGI_CD_ALL * * -EIO will be returned if the command is not supported.
*/ struct iommu_viommu_arm_smmuv3_invalidate {
__aligned_le64 cmd[2];
};
/** * struct iommu_hwpt_invalidate - ioctl(IOMMU_HWPT_INVALIDATE) * @size: sizeof(struct iommu_hwpt_invalidate) * @hwpt_id: ID of a nested HWPT or a vIOMMU, for cache invalidation * @data_uptr: User pointer to an array of driver-specific cache invalidation * data. * @data_type: One of enum iommu_hwpt_invalidate_data_type, defining the data * type of all the entries in the invalidation request array. It * should be a type supported by the hwpt pointed by @hwpt_id. * @entry_len: Length (in bytes) of a request entry in the request array * @entry_num: Input the number of cache invalidation requests in the array. * Output the number of requests successfully handled by kernel. * @__reserved: Must be 0. * * Invalidate iommu cache for user-managed page table or vIOMMU. Modifications * on a user-managed page table should be followed by this operation, if a HWPT * is passed in via @hwpt_id. Other caches, such as device cache or descriptor * cache can be flushed if a vIOMMU is passed in via the @hwpt_id field. * * Each ioctl can support one or more cache invalidation requests in the array * that has a total size of @entry_len * @entry_num. * * An empty invalidation request array by setting @entry_num==0 is allowed, and * @entry_len and @data_uptr would be ignored in this case. This can be used to * check if the given @data_type is supported or not by kernel.
*/ struct iommu_hwpt_invalidate {
__u32 size;
__u32 hwpt_id;
__aligned_u64 data_uptr;
__u32 data_type;
__u32 entry_len;
__u32 entry_num;
__u32 __reserved;
}; #define IOMMU_HWPT_INVALIDATE _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HWPT_INVALIDATE)
/** * enum iommu_hwpt_pgfault_flags - flags for struct iommu_hwpt_pgfault * @IOMMU_PGFAULT_FLAGS_PASID_VALID: The pasid field of the fault data is * valid. * @IOMMU_PGFAULT_FLAGS_LAST_PAGE: It's the last fault of a fault group.
*/ enum iommu_hwpt_pgfault_flags {
IOMMU_PGFAULT_FLAGS_PASID_VALID = (1 << 0),
IOMMU_PGFAULT_FLAGS_LAST_PAGE = (1 << 1),
};
/** * enum iommu_hwpt_pgfault_perm - perm bits for struct iommu_hwpt_pgfault * @IOMMU_PGFAULT_PERM_READ: request for read permission * @IOMMU_PGFAULT_PERM_WRITE: request for write permission * @IOMMU_PGFAULT_PERM_EXEC: (PCIE 10.4.1) request with a PASID that has the * Execute Requested bit set in PASID TLP Prefix. * @IOMMU_PGFAULT_PERM_PRIV: (PCIE 10.4.1) request with a PASID that has the * Privileged Mode Requested bit set in PASID TLP * Prefix.
*/ enum iommu_hwpt_pgfault_perm {
IOMMU_PGFAULT_PERM_READ = (1 << 0),
IOMMU_PGFAULT_PERM_WRITE = (1 << 1),
IOMMU_PGFAULT_PERM_EXEC = (1 << 2),
IOMMU_PGFAULT_PERM_PRIV = (1 << 3),
};
/** * struct iommu_hwpt_pgfault - iommu page fault data * @flags: Combination of enum iommu_hwpt_pgfault_flags * @dev_id: id of the originated device * @pasid: Process Address Space ID * @grpid: Page Request Group Index * @perm: Combination of enum iommu_hwpt_pgfault_perm * @__reserved: Must be 0. * @addr: Fault address * @length: a hint of how much data the requestor is expecting to fetch. For * example, if the PRI initiator knows it is going to do a 10MB * transfer, it could fill in 10MB and the OS could pre-fault in * 10MB of IOVA. It's default to 0 if there's no such hint. * @cookie: kernel-managed cookie identifying a group of fault messages. The * cookie number encoded in the last page fault of the group should * be echoed back in the response message.
*/ struct iommu_hwpt_pgfault {
__u32 flags;
__u32 dev_id;
__u32 pasid;
__u32 grpid;
__u32 perm;
__u32 __reserved;
__aligned_u64 addr;
__u32 length;
__u32 cookie;
};
/** * enum iommufd_page_response_code - Return status of fault handlers * @IOMMUFD_PAGE_RESP_SUCCESS: Fault has been handled and the page tables * populated, retry the access. This is the * "Success" defined in PCI 10.4.2.1. * @IOMMUFD_PAGE_RESP_INVALID: Could not handle this fault, don't retry the * access. This is the "Invalid Request" in PCI * 10.4.2.1.
*/ enum iommufd_page_response_code {
IOMMUFD_PAGE_RESP_SUCCESS = 0,
IOMMUFD_PAGE_RESP_INVALID = 1,
};
/** * struct iommu_hwpt_page_response - IOMMU page fault response * @cookie: The kernel-managed cookie reported in the fault message. * @code: One of response code in enum iommufd_page_response_code.
*/ struct iommu_hwpt_page_response {
__u32 cookie;
__u32 code;
};
/** * struct iommu_fault_alloc - ioctl(IOMMU_FAULT_QUEUE_ALLOC) * @size: sizeof(struct iommu_fault_alloc) * @flags: Must be 0 * @out_fault_id: The ID of the new FAULT * @out_fault_fd: The fd of the new FAULT * * Explicitly allocate a fault handling object.
*/ struct iommu_fault_alloc {
__u32 size;
__u32 flags;
__u32 out_fault_id;
__u32 out_fault_fd;
}; #define IOMMU_FAULT_QUEUE_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_FAULT_QUEUE_ALLOC)
/** * enum iommu_viommu_type - Virtual IOMMU Type * @IOMMU_VIOMMU_TYPE_DEFAULT: Reserved for future use * @IOMMU_VIOMMU_TYPE_ARM_SMMUV3: ARM SMMUv3 driver specific type * @IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for ARM * SMMUv3) enabled ARM SMMUv3 type
*/ enum iommu_viommu_type {
IOMMU_VIOMMU_TYPE_DEFAULT = 0,
IOMMU_VIOMMU_TYPE_ARM_SMMUV3 = 1,
IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV = 2,
};
/** * struct iommu_viommu_tegra241_cmdqv - NVIDIA Tegra241 CMDQV Virtual Interface * (IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV) * @out_vintf_mmap_offset: mmap offset argument for VINTF's page0 * @out_vintf_mmap_length: mmap length argument for VINTF's page0 * * Both @out_vintf_mmap_offset and @out_vintf_mmap_length are reported by kernel * for user space to mmap the VINTF page0 from the host physical address space * to the guest physical address space so that a guest kernel can directly R/W * access to the VINTF page0 in order to control its virtual command queues.
*/ struct iommu_viommu_tegra241_cmdqv {
__aligned_u64 out_vintf_mmap_offset;
__aligned_u64 out_vintf_mmap_length;
};
/** * struct iommu_viommu_alloc - ioctl(IOMMU_VIOMMU_ALLOC) * @size: sizeof(struct iommu_viommu_alloc) * @flags: Must be 0 * @type: Type of the virtual IOMMU. Must be defined in enum iommu_viommu_type * @dev_id: The device's physical IOMMU will be used to back the virtual IOMMU * @hwpt_id: ID of a nesting parent HWPT to associate to * @out_viommu_id: Output virtual IOMMU ID for the allocated object * @data_len: Length of the type specific data * @__reserved: Must be 0 * @data_uptr: User pointer to a driver-specific virtual IOMMU data * * Allocate a virtual IOMMU object, representing the underlying physical IOMMU's * virtualization support that is a security-isolated slice of the real IOMMU HW * that is unique to a specific VM. Operations global to the IOMMU are connected * to the vIOMMU, such as: * - Security namespace for guest owned ID, e.g. guest-controlled cache tags * - Non-device-affiliated event reporting, e.g. invalidation queue errors * - Access to a sharable nesting parent pagetable across physical IOMMUs * - Virtualization of various platforms IDs, e.g. RIDs and others * - Delivery of paravirtualized invalidation * - Direct assigned invalidation queues * - Direct assigned interrupts
*/ struct iommu_viommu_alloc {
__u32 size;
__u32 flags;
__u32 type;
__u32 dev_id;
__u32 hwpt_id;
__u32 out_viommu_id;
__u32 data_len;
__u32 __reserved;
__aligned_u64 data_uptr;
}; #define IOMMU_VIOMMU_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VIOMMU_ALLOC)
/** * struct iommu_vdevice_alloc - ioctl(IOMMU_VDEVICE_ALLOC) * @size: sizeof(struct iommu_vdevice_alloc) * @viommu_id: vIOMMU ID to associate with the virtual device * @dev_id: The physical device to allocate a virtual instance on the vIOMMU * @out_vdevice_id: Object handle for the vDevice. Pass to IOMMU_DESTORY * @virt_id: Virtual device ID per vIOMMU, e.g. vSID of ARM SMMUv3, vDeviceID * of AMD IOMMU, and vRID of Intel VT-d * * Allocate a virtual device instance (for a physical device) against a vIOMMU. * This instance holds the device's information (related to its vIOMMU) in a VM. * User should use IOMMU_DESTROY to destroy the virtual device before * destroying the physical device (by closing vfio_cdev fd). Otherwise the * virtual device would be forcibly destroyed on physical device destruction, * its vdevice_id would be permanently leaked (unremovable & unreusable) until * iommu fd closed.
*/ struct iommu_vdevice_alloc {
__u32 size;
__u32 viommu_id;
__u32 dev_id;
__u32 out_vdevice_id;
__aligned_u64 virt_id;
}; #define IOMMU_VDEVICE_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VDEVICE_ALLOC)
/** * struct iommu_ioas_change_process - ioctl(VFIO_IOAS_CHANGE_PROCESS) * @size: sizeof(struct iommu_ioas_change_process) * @__reserved: Must be 0 * * This transfers pinned memory counts for every memory map in every IOAS * in the context to the current process. This only supports maps created * with IOMMU_IOAS_MAP_FILE, and returns EINVAL if other maps are present. * If the ioctl returns a failure status, then nothing is changed. * * This API is useful for transferring operation of a device from one process * to another, such as during userland live update.
*/ struct iommu_ioas_change_process {
__u32 size;
__u32 __reserved;
};
/** * enum iommu_veventq_flag - flag for struct iommufd_vevent_header * @IOMMU_VEVENTQ_FLAG_LOST_EVENTS: vEVENTQ has lost vEVENTs
*/ enum iommu_veventq_flag {
IOMMU_VEVENTQ_FLAG_LOST_EVENTS = (1U << 0),
};
/** * struct iommufd_vevent_header - Virtual Event Header for a vEVENTQ Status * @flags: Combination of enum iommu_veventq_flag * @sequence: The sequence index of a vEVENT in the vEVENTQ, with a range of * [0, INT_MAX] where the following index of INT_MAX is 0 * * Each iommufd_vevent_header reports a sequence index of the following vEVENT: * * +----------------------+-------+----------------------+-------+---+-------+ * | header0 {sequence=0} | data0 | header1 {sequence=1} | data1 |...| dataN | * +----------------------+-------+----------------------+-------+---+-------+ * * And this sequence index is expected to be monotonic to the sequence index of * the previous vEVENT. If two adjacent sequence indexes has a delta larger than * 1, it means that delta - 1 number of vEVENTs has lost, e.g. two lost vEVENTs: * * +-----+----------------------+-------+----------------------+-------+-----+ * | ... | header3 {sequence=3} | data3 | header6 {sequence=6} | data6 | ... | * +-----+----------------------+-------+----------------------+-------+-----+ * * If a vEVENT lost at the tail of the vEVENTQ and there is no following vEVENT * providing the next sequence index, an IOMMU_VEVENTQ_FLAG_LOST_EVENTS header * would be added to the tail, and no data would follow this header: * * +--+----------------------+-------+-----------------------------------------+ * |..| header3 {sequence=3} | data3 | header4 {flags=LOST_EVENTS, sequence=4} | * +--+----------------------+-------+-----------------------------------------+
*/ struct iommufd_vevent_header {
__u32 flags;
__u32 sequence;
};
/** * struct iommu_vevent_arm_smmuv3 - ARM SMMUv3 Virtual Event * (IOMMU_VEVENTQ_TYPE_ARM_SMMUV3) * @evt: 256-bit ARM SMMUv3 Event record, little-endian. * Reported event records: (Refer to "7.3 Event records" in SMMUv3 HW Spec) * - 0x04 C_BAD_STE * - 0x06 F_STREAM_DISABLED * - 0x08 C_BAD_SUBSTREAMID * - 0x0a C_BAD_CD * - 0x10 F_TRANSLATION * - 0x11 F_ADDR_SIZE * - 0x12 F_ACCESS * - 0x13 F_PERMISSION * * StreamID field reports a virtual device ID. To receive a virtual event for a * device, a vDEVICE must be allocated via IOMMU_VDEVICE_ALLOC.
*/ struct iommu_vevent_arm_smmuv3 {
__aligned_le64 evt[4];
};
/** * struct iommu_vevent_tegra241_cmdqv - Tegra241 CMDQV IRQ * (IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV) * @lvcmdq_err_map: 128-bit logical vcmdq error map, little-endian. * (Refer to register LVCMDQ_ERR_MAPs per VINTF ) * * The 128-bit register value from HW exclusively reflect the error bits for a * Virtual Interface represented by a vIOMMU object. Read and report directly.
*/ struct iommu_vevent_tegra241_cmdqv {
__aligned_le64 lvcmdq_err_map[2];
};
/** * struct iommu_veventq_alloc - ioctl(IOMMU_VEVENTQ_ALLOC) * @size: sizeof(struct iommu_veventq_alloc) * @flags: Must be 0 * @viommu_id: virtual IOMMU ID to associate the vEVENTQ with * @type: Type of the vEVENTQ. Must be defined in enum iommu_veventq_type * @veventq_depth: Maximum number of events in the vEVENTQ * @out_veventq_id: The ID of the new vEVENTQ * @out_veventq_fd: The fd of the new vEVENTQ. User space must close the * successfully returned fd after using it * @__reserved: Must be 0 * * Explicitly allocate a virtual event queue interface for a vIOMMU. A vIOMMU * can have multiple FDs for different types, but is confined to one per @type. * User space should open the @out_veventq_fd to read vEVENTs out of a vEVENTQ, * if there are vEVENTs available. A vEVENTQ will lose events due to overflow, * if the number of the vEVENTs hits @veventq_depth. * * Each vEVENT in a vEVENTQ encloses a struct iommufd_vevent_header followed by * a type-specific data structure, in a normal case: * * +-+---------+-------+---------+-------+-----+---------+-------+-+ * | | header0 | data0 | header1 | data1 | ... | headerN | dataN | | * +-+---------+-------+---------+-------+-----+---------+-------+-+ * * unless a tailing IOMMU_VEVENTQ_FLAG_LOST_EVENTS header is logged (refer to * struct iommufd_vevent_header).
*/ struct iommu_veventq_alloc {
__u32 size;
__u32 flags;
__u32 viommu_id;
__u32 type;
__u32 veventq_depth;
__u32 out_veventq_id;
__u32 out_veventq_fd;
__u32 __reserved;
}; #define IOMMU_VEVENTQ_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VEVENTQ_ALLOC)
/** * enum iommu_hw_queue_type - HW Queue Type * @IOMMU_HW_QUEUE_TYPE_DEFAULT: Reserved for future use * @IOMMU_HW_QUEUE_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for ARM * SMMUv3) Virtual Command Queue (VCMDQ)
*/ enum iommu_hw_queue_type {
IOMMU_HW_QUEUE_TYPE_DEFAULT = 0, /* * TEGRA241_CMDQV requirements (otherwise, allocation will fail) * - alloc starts from the lowest @index=0 in ascending order * - destroy starts from the last allocated @index in descending order * - @base_addr must be aligned to @length in bytes and mapped in IOAS * - @length must be a power of 2, with a minimum 32 bytes and a maximum * 2 ^ idr[1].CMDQS * 16 bytes (use GET_HW_INFO call to read idr[1] * from struct iommu_hw_info_arm_smmuv3) * - suggest to back the queue memory with contiguous physical pages or * a single huge page with alignment of the queue size, and limit the * emulated vSMMU's IDR1.CMDQS to log2(huge page size / 16 bytes)
*/
IOMMU_HW_QUEUE_TYPE_TEGRA241_CMDQV = 1,
};
/** * struct iommu_hw_queue_alloc - ioctl(IOMMU_HW_QUEUE_ALLOC) * @size: sizeof(struct iommu_hw_queue_alloc) * @flags: Must be 0 * @viommu_id: Virtual IOMMU ID to associate the HW queue with * @type: One of enum iommu_hw_queue_type * @index: The logical index to the HW queue per virtual IOMMU for a multi-queue * model * @out_hw_queue_id: The ID of the new HW queue * @nesting_parent_iova: Base address of the queue memory in the guest physical * address space * @length: Length of the queue memory * * Allocate a HW queue object for a vIOMMU-specific HW-accelerated queue, which * allows HW to access a guest queue memory described using @nesting_parent_iova * and @length. * * A vIOMMU can allocate multiple queues, but it must use a different @index per * type to separate each allocation, e.g:: * * Type1 HW queue0, Type1 HW queue1, Type2 HW queue0, ...
*/ struct iommu_hw_queue_alloc {
__u32 size;
__u32 flags;
__u32 viommu_id;
__u32 type;
__u32 index;
__u32 out_hw_queue_id;
__aligned_u64 nesting_parent_iova;
__aligned_u64 length;
}; #define IOMMU_HW_QUEUE_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HW_QUEUE_ALLOC) #endif
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