Add a VhostOps callback issuing VHOST_RESET_OWNER, wired up for the kernel backend. The CPR (checkpoint-restore) path uses it to release device ownership on the source so the destination can reclaim it later with VHOST_SET_OWNER.
Originally-by: Mark Kanda <[email protected]> Originally-by: Steve Sistare <[email protected]> Originally-by: Ben Chaney <[email protected]> Reviewed-by: Stefano Garzarella <[email protected]> Signed-off-by: Andrey Drobyshev <[email protected]> --- hw/virtio/vhost-kernel.c | 6 ++++++ include/hw/virtio/vhost-backend.h | 2 ++ 2 files changed, 8 insertions(+) diff --git a/hw/virtio/vhost-kernel.c b/hw/virtio/vhost-kernel.c index 3390b48c6f1..55d316b88e9 100644 --- a/hw/virtio/vhost-kernel.c +++ b/hw/virtio/vhost-kernel.c @@ -261,6 +261,11 @@ static int vhost_kernel_set_owner(struct vhost_dev *dev) return vhost_kernel_call(dev, VHOST_SET_OWNER, NULL); } +static int vhost_kernel_reset_owner(struct vhost_dev *dev) +{ + return vhost_kernel_call(dev, VHOST_RESET_OWNER, NULL); +} + static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx) { assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); @@ -385,6 +390,7 @@ const VhostOps kernel_ops = { .vhost_get_features_ex = vhost_kernel_get_features, .vhost_set_backend_cap = vhost_kernel_set_backend_cap, .vhost_set_owner = vhost_kernel_set_owner, + .vhost_reset_owner = vhost_kernel_reset_owner, .vhost_get_vq_index = vhost_kernel_get_vq_index, .vhost_vsock_set_guest_cid = vhost_kernel_vsock_set_guest_cid, .vhost_vsock_set_running = vhost_kernel_vsock_set_running, diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index daa979a1aae..fb580aa417e 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -104,6 +104,7 @@ typedef int (*vhost_get_features_op)(struct vhost_dev *dev, uint64_t *features); typedef int (*vhost_set_backend_cap_op)(struct vhost_dev *dev); typedef int (*vhost_set_owner_op)(struct vhost_dev *dev); +typedef int (*vhost_reset_owner_op)(struct vhost_dev *dev); typedef int (*vhost_reset_device_op)(struct vhost_dev *dev); typedef int (*vhost_get_vq_index_op)(struct vhost_dev *dev, int idx); typedef int (*vhost_set_vring_enable_op)(struct vhost_dev *dev, @@ -205,6 +206,7 @@ typedef struct VhostOps { vhost_get_features_op vhost_get_features; vhost_set_backend_cap_op vhost_set_backend_cap; vhost_set_owner_op vhost_set_owner; + vhost_reset_owner_op vhost_reset_owner; vhost_reset_device_op vhost_reset_device; vhost_get_vq_index_op vhost_get_vq_index; vhost_set_vring_enable_op vhost_set_vring_enable; -- 2.47.1
