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| author | Changpeng Liu <changpeng.liu@intel.com> | 2018-01-04 09:53:31 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-01-18 21:52:37 +0200 |
| commit | 4c3e257b5e6ccba6bd34f780fab8008e0d79680a (patch) | |
| tree | 30483268b49b9826d8387f443b88d19e9a58a5f5 /include/hw/virtio/vhost.h | |
| parent | 1bcf209154445a5837a8fc0fc9d88200fedb25b2 (diff) | |
| download | qemu-4c3e257b5e6ccba6bd34f780fab8008e0d79680a.zip qemu-4c3e257b5e6ccba6bd34f780fab8008e0d79680a.tar.gz qemu-4c3e257b5e6ccba6bd34f780fab8008e0d79680a.tar.bz2 | |
vhost-user: add new vhost user messages to support virtio config space
Add VHOST_USER_GET_CONFIG/VHOST_USER_SET_CONFIG messages which can be
used for live migration of vhost user devices, also vhost user devices
can benefit from the messages to get/set virtio config space from/to the
I/O target. For the purpose to support virtio config space change,
VHOST_USER_SLAVE_CONFIG_CHANGE_MSG message is added as the event notifier
in case virtio config space change in the slave I/O target.
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/virtio/vhost.h')
| -rw-r--r-- | include/hw/virtio/vhost.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 467dc77..1dc2d73 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -46,6 +46,12 @@ struct vhost_iommu { QLIST_ENTRY(vhost_iommu) iommu_next; }; +typedef struct VhostDevConfigOps { + /* Vhost device config space changed callback + */ + int (*vhost_dev_config_notifier)(struct vhost_dev *dev); +} VhostDevConfigOps; + struct vhost_memory; struct vhost_dev { VirtIODevice *vdev; @@ -76,6 +82,7 @@ struct vhost_dev { QLIST_ENTRY(vhost_dev) entry; QLIST_HEAD(, vhost_iommu) iommu_list; IOMMUNotifier n; + const VhostDevConfigOps *config_ops; }; int vhost_dev_init(struct vhost_dev *hdev, void *opaque, @@ -106,4 +113,12 @@ int vhost_net_set_backend(struct vhost_dev *hdev, struct vhost_vring_file *file); int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); +int vhost_dev_get_config(struct vhost_dev *dev, uint8_t *config, + uint32_t config_len); +int vhost_dev_set_config(struct vhost_dev *dev, const uint8_t *data, + uint32_t offset, uint32_t size, uint32_t flags); +/* notifier callback in case vhost device config space changed + */ +void vhost_dev_set_config_notifier(struct vhost_dev *dev, + const VhostDevConfigOps *ops); #endif |