diff options
Diffstat (limited to 'vhost_user.h')
| -rw-r--r-- | vhost_user.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/vhost_user.h b/vhost_user.h new file mode 100644 index 0000000..25f0b61 --- /dev/null +++ b/vhost_user.h @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/* some parts from subprojects/libvhost-user/libvhost-user.h */ + +#ifndef VHOST_USER_H +#define VHOST_USER_H + +#include "virtio.h" +#include "iov.h" + +#define VHOST_USER_F_PROTOCOL_FEATURES 30 + +#define VHOST_MEMORY_BASELINE_NREGIONS 8 + +enum vhost_user_protocol_feature { + VHOST_USER_PROTOCOL_F_MQ = 0, + VHOST_USER_PROTOCOL_F_LOG_SHMFD = 1, + VHOST_USER_PROTOCOL_F_RARP = 2, + VHOST_USER_PROTOCOL_F_REPLY_ACK = 3, + VHOST_USER_PROTOCOL_F_NET_MTU = 4, + VHOST_USER_PROTOCOL_F_BACKEND_REQ = 5, + VHOST_USER_PROTOCOL_F_CROSS_ENDIAN = 6, + VHOST_USER_PROTOCOL_F_CRYPTO_SESSION = 7, + VHOST_USER_PROTOCOL_F_PAGEFAULT = 8, + VHOST_USER_PROTOCOL_F_CONFIG = 9, + VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD = 10, + VHOST_USER_PROTOCOL_F_HOST_NOTIFIER = 11, + VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12, + VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS = 14, + VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS = 15, + + VHOST_USER_PROTOCOL_F_MAX +}; + +enum vhost_user_request { + VHOST_USER_NONE = 0, + VHOST_USER_GET_FEATURES = 1, + VHOST_USER_SET_FEATURES = 2, + VHOST_USER_SET_OWNER = 3, + VHOST_USER_RESET_OWNER = 4, + VHOST_USER_SET_MEM_TABLE = 5, + VHOST_USER_SET_LOG_BASE = 6, + VHOST_USER_SET_LOG_FD = 7, + VHOST_USER_SET_VRING_NUM = 8, + VHOST_USER_SET_VRING_ADDR = 9, + VHOST_USER_SET_VRING_BASE = 10, + VHOST_USER_GET_VRING_BASE = 11, + VHOST_USER_SET_VRING_KICK = 12, + VHOST_USER_SET_VRING_CALL = 13, + VHOST_USER_SET_VRING_ERR = 14, + VHOST_USER_GET_PROTOCOL_FEATURES = 15, + VHOST_USER_SET_PROTOCOL_FEATURES = 16, + VHOST_USER_GET_QUEUE_NUM = 17, + VHOST_USER_SET_VRING_ENABLE = 18, + VHOST_USER_SEND_RARP = 19, + VHOST_USER_NET_SET_MTU = 20, + VHOST_USER_SET_BACKEND_REQ_FD = 21, + VHOST_USER_IOTLB_MSG = 22, + VHOST_USER_SET_VRING_ENDIAN = 23, + VHOST_USER_GET_CONFIG = 24, + VHOST_USER_SET_CONFIG = 25, + VHOST_USER_CREATE_CRYPTO_SESSION = 26, + VHOST_USER_CLOSE_CRYPTO_SESSION = 27, + VHOST_USER_POSTCOPY_ADVISE = 28, + VHOST_USER_POSTCOPY_LISTEN = 29, + VHOST_USER_POSTCOPY_END = 30, + VHOST_USER_GET_INFLIGHT_FD = 31, + VHOST_USER_SET_INFLIGHT_FD = 32, + VHOST_USER_GPU_SET_SOCKET = 33, + VHOST_USER_VRING_KICK = 35, + VHOST_USER_GET_MAX_MEM_SLOTS = 36, + VHOST_USER_ADD_MEM_REG = 37, + VHOST_USER_REM_MEM_REG = 38, + VHOST_USER_MAX +}; + +typedef struct { + enum vhost_user_request request; + +#define VHOST_USER_VERSION_MASK 0x3 +#define VHOST_USER_REPLY_MASK (0x1 << 2) +#define VHOST_USER_NEED_REPLY_MASK (0x1 << 3) + uint32_t flags; + uint32_t size; /* the following payload size */ +} __attribute__ ((__packed__)) vhost_user_header; + +typedef struct VhostUserMemory_region { + uint64_t guest_phys_addr; + uint64_t memory_size; + uint64_t userspace_addr; + uint64_t mmap_offset; +} VhostUserMemory_region; + +struct VhostUserMemory { + uint32_t nregions; + uint32_t padding; + struct VhostUserMemory_region regions[VHOST_MEMORY_BASELINE_NREGIONS]; +}; + +typedef union { +#define VHOST_USER_VRING_IDX_MASK 0xff +#define VHOST_USER_VRING_NOFD_MASK (0x1 << 8) + uint64_t u64; + struct vhost_vring_state state; + struct vhost_vring_addr addr; + struct VhostUserMemory memory; +} vhost_user_payload; + +typedef struct VhostUserMsg { + vhost_user_header hdr; + vhost_user_payload payload; + + int fds[VHOST_MEMORY_BASELINE_NREGIONS]; + int fd_num; + uint8_t *data; +} __attribute__ ((__packed__)) VhostUserMsg; +#define VHOST_USER_HDR_SIZE sizeof(vhost_user_header) + +#define VHOST_USER_RX_QUEUE 0 +#define VHOST_USER_TX_QUEUE 1 + +static inline bool vu_queue_enabled(VuVirtq *vq) +{ + return vq->enable; +} + +static inline bool vu_queue_started(const VuVirtq *vq) +{ + return vq->started; +} + +size_t tap_send_frames_vu(const struct ctx *c, const struct iovec *iov, + size_t n); +int vu_send(const struct ctx *c, const void *data, size_t len); +void vu_print_capabilities(void); +void vu_init(struct ctx *c); +void vu_kick_cb(struct ctx *c, union epoll_ref ref); +void tap_handler_vu(struct ctx *c, uint32_t events); +#endif /* VHOST_USER_H */ |