[PATCH v2 11/19] vhost-vdpa: introduce uAPI to get the number of virtqueue groups
From: Gautam Dawar <hidden>
Date: 2022-03-30 18:15:03
Also in:
kvm, lkml
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Follows the vDPA support for multiple address spaces, this patch introduce uAPI for the userspace to know the number of virtqueue groups supported by the vDPA device. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Gautam Dawar <redacted> --- drivers/vhost/vdpa.c | 4 ++++ include/uapi/linux/vhost.h | 4 +++- 2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index cd1bee536c46..92f78df0f685 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -559,6 +559,10 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, case VHOST_VDPA_GET_VRING_NUM: r = vhost_vdpa_get_vring_num(v, argp); break; + case VHOST_VDPA_GET_GROUP_NUM: + r = copy_to_user(argp, &v->vdpa->ngroups, + sizeof(v->vdpa->ngroups)); + break; case VHOST_SET_LOG_BASE: case VHOST_SET_LOG_FD: r = -ENOIOCTLCMD;
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 8f7b4a95d6f9..61317c61d768 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h@@ -145,11 +145,13 @@ /* Get the valid iova range */ #define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \ struct vhost_vdpa_iova_range) - /* Get the config size */ #define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32) /* Get the count of all virtqueues */ #define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32) +/* Get the number of virtqueue groups. */ +#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x81, __u32) + #endif
--
2.30.1