include/uapi/linux/virtio_iommu.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/virtio_iommu.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/virtio_iommu.h
Extension
.h
Size
3941 bytes
Lines
172
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct virtio_iommu_range_64 {
	__le64					start;
	__le64					end;
};

struct virtio_iommu_range_32 {
	__le32					start;
	__le32					end;
};

struct virtio_iommu_config {
	/* Supported page sizes */
	__le64					page_size_mask;
	/* Supported IOVA range */
	struct virtio_iommu_range_64		input_range;
	/* Max domain ID size */
	struct virtio_iommu_range_32		domain_range;
	/* Probe buffer size */
	__le32					probe_size;
	__u8					bypass;
	__u8					reserved[3];
};

/* Request types */
#define VIRTIO_IOMMU_T_ATTACH			0x01
#define VIRTIO_IOMMU_T_DETACH			0x02
#define VIRTIO_IOMMU_T_MAP			0x03
#define VIRTIO_IOMMU_T_UNMAP			0x04
#define VIRTIO_IOMMU_T_PROBE			0x05

/* Status types */
#define VIRTIO_IOMMU_S_OK			0x00
#define VIRTIO_IOMMU_S_IOERR			0x01
#define VIRTIO_IOMMU_S_UNSUPP			0x02
#define VIRTIO_IOMMU_S_DEVERR			0x03
#define VIRTIO_IOMMU_S_INVAL			0x04
#define VIRTIO_IOMMU_S_RANGE			0x05
#define VIRTIO_IOMMU_S_NOENT			0x06
#define VIRTIO_IOMMU_S_FAULT			0x07
#define VIRTIO_IOMMU_S_NOMEM			0x08

struct virtio_iommu_req_head {
	__u8					type;
	__u8					reserved[3];
};

struct virtio_iommu_req_tail {
	__u8					status;
	__u8					reserved[3];
};

#define VIRTIO_IOMMU_ATTACH_F_BYPASS		(1 << 0)

struct virtio_iommu_req_attach {
	struct virtio_iommu_req_head		head;
	__le32					domain;
	__le32					endpoint;
	__le32					flags;
	__u8					reserved[4];
	struct virtio_iommu_req_tail		tail;
};

struct virtio_iommu_req_detach {
	struct virtio_iommu_req_head		head;
	__le32					domain;
	__le32					endpoint;
	__u8					reserved[8];
	struct virtio_iommu_req_tail		tail;
};

#define VIRTIO_IOMMU_MAP_F_READ			(1 << 0)
#define VIRTIO_IOMMU_MAP_F_WRITE		(1 << 1)
#define VIRTIO_IOMMU_MAP_F_MMIO			(1 << 2)

#define VIRTIO_IOMMU_MAP_F_MASK			(VIRTIO_IOMMU_MAP_F_READ |	\
						 VIRTIO_IOMMU_MAP_F_WRITE |	\
						 VIRTIO_IOMMU_MAP_F_MMIO)

struct virtio_iommu_req_map {
	struct virtio_iommu_req_head		head;
	__le32					domain;
	__le64					virt_start;
	__le64					virt_end;
	__le64					phys_start;
	__le32					flags;
	struct virtio_iommu_req_tail		tail;
};

struct virtio_iommu_req_unmap {
	struct virtio_iommu_req_head		head;

Annotation

Implementation Notes