mirror of
https://github.com/qemu/qemu.git
synced 2025-08-02 12:45:00 +00:00
f1f9e6c596
With virtio 1, the vring layout is split in 3 separate regions of contiguous memory for the descriptor table, the available ring and the used ring, as opposed with legacy virtio which uses a single region. In case of memory re-mapping, the code ensures it doesn't affect the vring mapping. This is done in vhost_verify_ring_mappings() which assumes the device is legacy. This patch changes vhost_verify_ring_mappings() to check the mappings of each part of the vring separately. This works for legacy mappings as well. Cc: qemu-stable@nongnu.org Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
#ifndef VHOST_H
|
|
#define VHOST_H
|
|
|
|
#include "hw/hw.h"
|
|
#include "hw/virtio/vhost-backend.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 desc_phys;
|
|
unsigned desc_size;
|
|
unsigned long long avail_phys;
|
|
unsigned avail_size;
|
|
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)
|
|
#define VHOST_INVALID_FEATURE_BIT (0xff)
|
|
|
|
struct vhost_log {
|
|
unsigned long long size;
|
|
int refcnt;
|
|
int fd;
|
|
vhost_log_chunk_t *log;
|
|
};
|
|
|
|
struct vhost_memory;
|
|
struct vhost_dev {
|
|
MemoryListener memory_listener;
|
|
struct vhost_memory *mem;
|
|
int n_mem_sections;
|
|
MemoryRegionSection *mem_sections;
|
|
struct vhost_virtqueue *vqs;
|
|
int nvqs;
|
|
/* the first virtqueue which would be used by this vhost dev */
|
|
int vq_index;
|
|
uint64_t features;
|
|
uint64_t acked_features;
|
|
uint64_t backend_features;
|
|
uint64_t protocol_features;
|
|
uint64_t max_queues;
|
|
bool started;
|
|
bool log_enabled;
|
|
uint64_t log_size;
|
|
Error *migration_blocker;
|
|
bool memory_changed;
|
|
hwaddr mem_changed_start_addr;
|
|
hwaddr mem_changed_end_addr;
|
|
const VhostOps *vhost_ops;
|
|
void *opaque;
|
|
struct vhost_log *log;
|
|
QLIST_ENTRY(vhost_dev) entry;
|
|
};
|
|
|
|
int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
|
|
VhostBackendType backend_type,
|
|
uint32_t busyloop_timeout);
|
|
void vhost_dev_cleanup(struct vhost_dev *hdev);
|
|
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);
|
|
uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
|
|
uint64_t features);
|
|
void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
|
|
uint64_t features);
|
|
bool vhost_has_free_slot(void);
|
|
|
|
int vhost_net_set_backend(struct vhost_dev *hdev,
|
|
struct vhost_vring_file *file);
|
|
|
|
#endif
|