1#ifndef VHOST_H
2#define VHOST_H
3
4#include "hw/virtio/vhost-backend.h"
5#include "hw/virtio/virtio.h"
6#include "exec/memory.h"
7
8
9
10struct vhost_inflight {
11 int fd;
12 void *addr;
13 uint64_t size;
14 uint64_t offset;
15 uint16_t queue_size;
16};
17
18struct vhost_virtqueue {
19 int kick;
20 int call;
21 void *desc;
22 void *avail;
23 void *used;
24 int num;
25 unsigned long long desc_phys;
26 unsigned desc_size;
27 unsigned long long avail_phys;
28 unsigned avail_size;
29 unsigned long long used_phys;
30 unsigned used_size;
31 EventNotifier masked_notifier;
32 struct vhost_dev *dev;
33};
34
35typedef unsigned long vhost_log_chunk_t;
36#define VHOST_LOG_PAGE 0x1000
37#define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t))
38#define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS)
39#define VHOST_INVALID_FEATURE_BIT (0xff)
40
41struct vhost_log {
42 unsigned long long size;
43 int refcnt;
44 int fd;
45 vhost_log_chunk_t *log;
46};
47
48struct vhost_dev;
49struct vhost_iommu {
50 struct vhost_dev *hdev;
51 MemoryRegion *mr;
52 hwaddr iommu_offset;
53 IOMMUNotifier n;
54 QLIST_ENTRY(vhost_iommu) iommu_next;
55};
56
57typedef struct VhostDevConfigOps {
58
59
60 int (*vhost_dev_config_notifier)(struct vhost_dev *dev);
61} VhostDevConfigOps;
62
63struct vhost_memory;
64struct vhost_dev {
65 VirtIODevice *vdev;
66 MemoryListener memory_listener;
67 MemoryListener iommu_listener;
68 struct vhost_memory *mem;
69 int n_mem_sections;
70 MemoryRegionSection *mem_sections;
71 int n_tmp_sections;
72 MemoryRegionSection *tmp_sections;
73 struct vhost_virtqueue *vqs;
74 int nvqs;
75
76 int vq_index;
77
78 int num_queues;
79 uint64_t features;
80 uint64_t acked_features;
81 uint64_t backend_features;
82 uint64_t protocol_features;
83 uint64_t max_queues;
84 uint64_t backend_cap;
85 bool started;
86 bool log_enabled;
87 uint64_t log_size;
88 Error *migration_blocker;
89 const VhostOps *vhost_ops;
90 void *opaque;
91 struct vhost_log *log;
92 QLIST_ENTRY(vhost_dev) entry;
93 QLIST_HEAD(, vhost_iommu) iommu_list;
94 IOMMUNotifier n;
95 const VhostDevConfigOps *config_ops;
96};
97
98struct vhost_net {
99 struct vhost_dev dev;
100 struct vhost_virtqueue vqs[2];
101 int backend;
102 NetClientState *nc;
103};
104
105int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
106 VhostBackendType backend_type,
107 uint32_t busyloop_timeout, Error **errp);
108void vhost_dev_cleanup(struct vhost_dev *hdev);
109int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
110void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
111int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
112void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
113
114
115
116
117bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
118
119
120
121void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
122 bool mask);
123uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
124 uint64_t features);
125void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
126 uint64_t features);
127bool vhost_has_free_slot(void);
128
129int vhost_net_set_backend(struct vhost_dev *hdev,
130 struct vhost_vring_file *file);
131
132int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write);
133int vhost_dev_get_config(struct vhost_dev *hdev, uint8_t *config,
134 uint32_t config_len, Error **errp);
135int vhost_dev_set_config(struct vhost_dev *dev, const uint8_t *data,
136 uint32_t offset, uint32_t size, uint32_t flags);
137
138
139void vhost_dev_set_config_notifier(struct vhost_dev *dev,
140 const VhostDevConfigOps *ops);
141
142void vhost_dev_reset_inflight(struct vhost_inflight *inflight);
143void vhost_dev_free_inflight(struct vhost_inflight *inflight);
144void vhost_dev_save_inflight(struct vhost_inflight *inflight, QEMUFile *f);
145int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f);
146int vhost_dev_prepare_inflight(struct vhost_dev *hdev, VirtIODevice *vdev);
147int vhost_dev_set_inflight(struct vhost_dev *dev,
148 struct vhost_inflight *inflight);
149int vhost_dev_get_inflight(struct vhost_dev *dev, uint16_t queue_size,
150 struct vhost_inflight *inflight);
151#endif
152