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| author | Longpeng <longpeng2@huawei.com> | 2022-03-15 11:25:53 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-03-28 16:53:00 -0400 |
| commit | b04d910af330b55e1d5d6eb9ecd53a375a9cf81c (patch) | |
| tree | 21325d43a9ba2f7277bc9991d60eef9617596ea6 /drivers/vhost | |
| parent | 81d46d693173a5c86a9b0c648eca1817ad5c0ae5 (diff) | |
| download | linux-stable-b04d910af330b55e1d5d6eb9ecd53a375a9cf81c.tar.gz linux-stable-b04d910af330b55e1d5d6eb9ecd53a375a9cf81c.tar.bz2 linux-stable-b04d910af330b55e1d5d6eb9ecd53a375a9cf81c.zip | |
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 <<a href="mailto:longpeng2@huawei.com" target="_blank">longpeng2@huawei.com</a>><br>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 13 |
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) |