| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| #ifndef _LINUX_VHOST_TYPES_H |
| #define _LINUX_VHOST_TYPES_H |
| /* Userspace interface for in-kernel virtio accelerators. */ |
| |
| /* vhost is used to reduce the number of system calls involved in virtio. |
| * |
| * Existing virtio net code is used in the guest without modification. |
| * |
| * This header includes interface used by userspace hypervisor for |
| * device configuration. |
| */ |
| |
| #include "standard-headers/linux/types.h" |
| |
| #include "standard-headers/linux/virtio_config.h" |
| #include "standard-headers/linux/virtio_ring.h" |
| |
| struct vhost_vring_state { |
| unsigned int index; |
| unsigned int num; |
| }; |
| |
| struct vhost_vring_file { |
| unsigned int index; |
| int fd; /* Pass -1 to unbind from file. */ |
| |
| }; |
| |
| struct vhost_vring_addr { |
| unsigned int index; |
| /* Option flags. */ |
| unsigned int flags; |
| /* Flag values: */ |
| /* Whether log address is valid. If set enables logging. */ |
| #define VHOST_VRING_F_LOG 0 |
| |
| /* Start of array of descriptors (virtually contiguous) */ |
| uint64_t desc_user_addr; |
| /* Used structure address. Must be 32 bit aligned */ |
| uint64_t used_user_addr; |
| /* Available structure address. Must be 16 bit aligned */ |
| uint64_t avail_user_addr; |
| /* Logging support. */ |
| /* Log writes to used structure, at offset calculated from specified |
| * address. Address must be 32 bit aligned. */ |
| uint64_t log_guest_addr; |
| }; |
| |
| /* no alignment requirement */ |
| struct vhost_iotlb_msg { |
| uint64_t iova; |
| uint64_t size; |
| uint64_t uaddr; |
| #define VHOST_ACCESS_RO 0x1 |
| #define VHOST_ACCESS_WO 0x2 |
| #define VHOST_ACCESS_RW 0x3 |
| uint8_t perm; |
| #define VHOST_IOTLB_MISS 1 |
| #define VHOST_IOTLB_UPDATE 2 |
| #define VHOST_IOTLB_INVALIDATE 3 |
| #define VHOST_IOTLB_ACCESS_FAIL 4 |
| /* |
| * VHOST_IOTLB_BATCH_BEGIN and VHOST_IOTLB_BATCH_END allow modifying |
| * multiple mappings in one go: beginning with |
| * VHOST_IOTLB_BATCH_BEGIN, followed by any number of |
| * VHOST_IOTLB_UPDATE messages, and ending with VHOST_IOTLB_BATCH_END. |
| * When one of these two values is used as the message type, the rest |
| * of the fields in the message are ignored. There's no guarantee that |
| * these changes take place automatically in the device. |
| */ |
| #define VHOST_IOTLB_BATCH_BEGIN 5 |
| #define VHOST_IOTLB_BATCH_END 6 |
| uint8_t type; |
| }; |
| |
| #define VHOST_IOTLB_MSG 0x1 |
| #define VHOST_IOTLB_MSG_V2 0x2 |
| |
| struct vhost_msg { |
| int type; |
| union { |
| struct vhost_iotlb_msg iotlb; |
| uint8_t padding[64]; |
| }; |
| }; |
| |
| struct vhost_msg_v2 { |
| uint32_t type; |
| uint32_t reserved; |
| union { |
| struct vhost_iotlb_msg iotlb; |
| uint8_t padding[64]; |
| }; |
| }; |
| |
| struct vhost_memory_region { |
| uint64_t guest_phys_addr; |
| uint64_t memory_size; /* bytes */ |
| uint64_t userspace_addr; |
| uint64_t flags_padding; /* No flags are currently specified. */ |
| }; |
| |
| /* All region addresses and sizes must be 4K aligned. */ |
| #define VHOST_PAGE_SIZE 0x1000 |
| |
| struct vhost_memory { |
| uint32_t nregions; |
| uint32_t padding; |
| struct vhost_memory_region regions[0]; |
| }; |
| |
| /* VHOST_SCSI specific definitions */ |
| |
| /* |
| * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. |
| * |
| * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate + |
| * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage |
| * ABI Rev 1: January 2013. Ignore vhost_tpgt field in struct vhost_scsi_target. |
| * All the targets under vhost_wwpn can be seen and used by guset. |
| */ |
| |
| #define VHOST_SCSI_ABI_VERSION 1 |
| |
| struct vhost_scsi_target { |
| int abi_version; |
| char vhost_wwpn[224]; /* TRANSPORT_IQN_LEN */ |
| unsigned short vhost_tpgt; |
| unsigned short reserved; |
| }; |
| |
| /* VHOST_VDPA specific definitions */ |
| |
| struct vhost_vdpa_config { |
| uint32_t off; |
| uint32_t len; |
| uint8_t buf[0]; |
| }; |
| |
| /* Feature bits */ |
| /* Log all write descriptors. Can be changed while device is active. */ |
| #define VHOST_F_LOG_ALL 26 |
| /* vhost-net should add virtio_net_hdr for RX, and strip for TX packets. */ |
| #define VHOST_NET_F_VIRTIO_NET_HDR 27 |
| |
| #endif |