1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef _LINUX_VHOST_TYPES_H |
3 | #define _LINUX_VHOST_TYPES_H |
4 | /* Userspace interface for in-kernel virtio accelerators. */ |
5 | |
6 | /* vhost is used to reduce the number of system calls involved in virtio. |
7 | * |
8 | * Existing virtio net code is used in the guest without modification. |
9 | * |
10 | * This header includes interface used by userspace hypervisor for |
11 | * device configuration. |
12 | */ |
13 | |
14 | #include "standard-headers/linux/types.h" |
15 | |
16 | #include "standard-headers/linux/virtio_config.h" |
17 | #include "standard-headers/linux/virtio_ring.h" |
18 | |
19 | struct vhost_vring_state { |
20 | unsigned int index; |
21 | unsigned int num; |
22 | }; |
23 | |
24 | struct vhost_vring_file { |
25 | unsigned int index; |
26 | int fd; /* Pass -1 to unbind from file. */ |
27 | |
28 | }; |
29 | |
30 | struct vhost_vring_addr { |
31 | unsigned int index; |
32 | /* Option flags. */ |
33 | unsigned int flags; |
34 | /* Flag values: */ |
35 | /* Whether log address is valid. If set enables logging. */ |
36 | #define VHOST_VRING_F_LOG 0 |
37 | |
38 | /* Start of array of descriptors (virtually contiguous) */ |
39 | uint64_t desc_user_addr; |
40 | /* Used structure address. Must be 32 bit aligned */ |
41 | uint64_t used_user_addr; |
42 | /* Available structure address. Must be 16 bit aligned */ |
43 | uint64_t avail_user_addr; |
44 | /* Logging support. */ |
45 | /* Log writes to used structure, at offset calculated from specified |
46 | * address. Address must be 32 bit aligned. */ |
47 | uint64_t log_guest_addr; |
48 | }; |
49 | |
50 | /* no alignment requirement */ |
51 | struct vhost_iotlb_msg { |
52 | uint64_t iova; |
53 | uint64_t size; |
54 | uint64_t uaddr; |
55 | #define VHOST_ACCESS_RO 0x1 |
56 | #define VHOST_ACCESS_WO 0x2 |
57 | #define VHOST_ACCESS_RW 0x3 |
58 | uint8_t perm; |
59 | #define VHOST_IOTLB_MISS 1 |
60 | #define VHOST_IOTLB_UPDATE 2 |
61 | #define VHOST_IOTLB_INVALIDATE 3 |
62 | #define VHOST_IOTLB_ACCESS_FAIL 4 |
63 | uint8_t type; |
64 | }; |
65 | |
66 | #define VHOST_IOTLB_MSG 0x1 |
67 | #define VHOST_IOTLB_MSG_V2 0x2 |
68 | |
69 | struct vhost_msg { |
70 | int type; |
71 | union { |
72 | struct vhost_iotlb_msg iotlb; |
73 | uint8_t padding[64]; |
74 | }; |
75 | }; |
76 | |
77 | struct vhost_msg_v2 { |
78 | uint32_t type; |
79 | uint32_t reserved; |
80 | union { |
81 | struct vhost_iotlb_msg iotlb; |
82 | uint8_t padding[64]; |
83 | }; |
84 | }; |
85 | |
86 | struct vhost_memory_region { |
87 | uint64_t guest_phys_addr; |
88 | uint64_t memory_size; /* bytes */ |
89 | uint64_t userspace_addr; |
90 | uint64_t flags_padding; /* No flags are currently specified. */ |
91 | }; |
92 | |
93 | /* All region addresses and sizes must be 4K aligned. */ |
94 | #define VHOST_PAGE_SIZE 0x1000 |
95 | |
96 | struct vhost_memory { |
97 | uint32_t nregions; |
98 | uint32_t padding; |
99 | struct vhost_memory_region regions[0]; |
100 | }; |
101 | |
102 | /* VHOST_SCSI specific definitions */ |
103 | |
104 | /* |
105 | * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. |
106 | * |
107 | * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate + |
108 | * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage |
109 | * ABI Rev 1: January 2013. Ignore vhost_tpgt field in struct vhost_scsi_target. |
110 | * All the targets under vhost_wwpn can be seen and used by guset. |
111 | */ |
112 | |
113 | #define VHOST_SCSI_ABI_VERSION 1 |
114 | |
115 | struct vhost_scsi_target { |
116 | int abi_version; |
117 | char vhost_wwpn[224]; /* TRANSPORT_IQN_LEN */ |
118 | unsigned short vhost_tpgt; |
119 | unsigned short reserved; |
120 | }; |
121 | |
122 | /* Feature bits */ |
123 | /* Log all write descriptors. Can be changed while device is active. */ |
124 | #define VHOST_F_LOG_ALL 26 |
125 | /* vhost-net should add virtio_net_hdr for RX, and strip for TX packets. */ |
126 | #define VHOST_NET_F_VIRTIO_NET_HDR 27 |
127 | |
128 | #endif |
129 | |