blob: de24746c7e2e66595ba5d0f1368f060be6315cff (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
#ifndef VHOST_H
#define VHOST_H
#include "hw/hw.h"
#include "hw/virtio/virtio.h"
#include "exec/memory.h"
/* Generic structures common for any vhost based device. */
struct vhost_virtqueue {
int kick;
int call;
void *desc;
void *avail;
void *used;
int num;
unsigned long long used_phys;
unsigned used_size;
void *ring;
unsigned long long ring_phys;
unsigned ring_size;
EventNotifier masked_notifier;
};
typedef unsigned long vhost_log_chunk_t;
#define VHOST_LOG_PAGE 0x1000
#define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t))
#define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS)
struct vhost_memory;
struct vhost_dev {
MemoryListener memory_listener;
int control;
struct vhost_memory *mem;
int n_mem_sections;
MemoryRegionSection *mem_sections;
struct vhost_virtqueue *vqs;
int nvqs;
/* the first virtuque which would be used by this vhost dev */
int vq_index;
unsigned long long features;
unsigned long long acked_features;
unsigned long long backend_features;
bool started;
bool log_enabled;
vhost_log_chunk_t *log;
unsigned long long log_size;
bool force;
bool memory_changed;
hwaddr mem_changed_start_addr;
hwaddr mem_changed_end_addr;
};
int vhost_dev_init(struct vhost_dev *hdev, int devfd, const char *devpath,
bool force);
void vhost_dev_cleanup(struct vhost_dev *hdev);
bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev);
int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
/* Test and clear masked event pending status.
* Should be called after unmask to avoid losing events.
*/
bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
/* Mask/unmask events from this vq.
*/
void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
bool mask);
#endif
|
