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authorLongpeng <longpeng2@huawei.com>2022-03-15 06:25:53 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-03-28 23:53:00 +0300
commitb04d910af330b55e1d5d6eb9ecd53a375a9cf81c (patch)
tree21325d43a9ba2f7277bc9991d60eef9617596ea6 /drivers/vhost
parent81d46d693173a5c86a9b0c648eca1817ad5c0ae5 (diff)
downloadlinux-b04d910af330b55e1d5d6eb9ecd53a375a9cf81c.tar.xz
vdpa: support exposing the count of vqs to userspace
- GET_VQS_COUNT: the count of virtqueues that exposed Signed-off-by: Longpeng <longpeng2@huawei.com> Link: https://lore.kernel.org/r/20220315032553.455-4-longpeng2@huawei.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Longpeng &lt;<a href="mailto:longpeng2@huawei.com" target="_blank">longpeng2@huawei.com</a>&gt;<br> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'drivers/vhost')
-rw-r--r--drivers/vhost/vdpa.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 3b7fc2fe45f3..4c2f0bd06285 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -373,6 +373,16 @@ static long vhost_vdpa_get_config_size(struct vhost_vdpa *v, u32 __user *argp)
return 0;
}
+static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp)
+{
+ struct vdpa_device *vdpa = v->vdpa;
+
+ if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs)))
+ return -EFAULT;
+
+ return 0;
+}
+
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
void __user *argp)
{
@@ -513,6 +523,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_GET_CONFIG_SIZE:
r = vhost_vdpa_get_config_size(v, argp);
break;
+ case VHOST_VDPA_GET_VQS_COUNT:
+ r = vhost_vdpa_get_vqs_count(v, argp);
+ break;
default:
r = vhost_dev_ioctl(&v->vdev, cmd, argp);
if (r == -ENOIOCTLCMD)