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...ned-off-by: Si-Wei Liu <si-wei.liu at oracle.com> Acked-by: Eugenio P?rez <eperezma at redhat.com> --- drivers/vhost/vdpa.c | 10 ++++++++++ include/uapi/linux/vhost.h | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index f2e5dce..eabac06 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -602,6 +602,16 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, else if (copy_to_user(argp, &s, sizeof(s))) return -EFAULT; return 0; + case VHOST_VDPA_GET_VRING_DESC_GROUP: + if (!...

...--- RFC v1 -> v2: - add clarifications for what areas F_DESC_ASID should cover --- drivers/vhost/vdpa.c | 17 +++++++++++++++++ include/uapi/linux/vhost_types.h | 5 +++++ 2 files changed, 22 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index b43e868..f2e5dce 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -389,6 +389,14 @@ static bool vhost_vdpa_can_resume(const struct vhost_vdpa *v) return ops->resume; } +static bool vhost_vdpa_has_desc_group(const struct vhost_vdpa *v) +{ + struct vdpa_device *vdpa = v->vdpa; + const struc...

Following patchset introduces dedicated group for descriptor table to reduce live migration downtime when passthrough VQ is being switched to shadow VQ. This RFC v2 is sent to incorporate the early feedback from reviewers on the uAPI and driver API part of changes, the associated driver patch set consuming ths API will come around soon along with formal submission of this series. Some initial