| Message ID | 20220315032553.455-4-longpeng2@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vdpa: add two ioctl commands to support generic vDPA | expand |
On Tue, Mar 15, 2022 at 11:25:53AM +0800, Longpeng(Mike) wrote: >From: Longpeng <longpeng2@huawei.com> > >- GET_VQS_COUNT: the count of virtqueues that exposed > >Signed-off-by: Longpeng <longpeng2@huawei.com> >--- > drivers/vhost/vdpa.c | 13 +++++++++++++ > include/uapi/linux/vhost.h | 3 +++ > 2 files changed, 16 insertions(+) > >diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c >index 0c82eb5..69b3f05 100644 >--- a/drivers/vhost/vdpa.c >+++ b/drivers/vhost/vdpa.c >@@ -370,6 +370,16 @@ 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) > { >@@ -510,6 +520,9 @@ 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) >diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h >index bc74e95..5d99e7c 100644 >--- a/include/uapi/linux/vhost.h >+++ b/include/uapi/linux/vhost.h >@@ -154,4 +154,7 @@ > /* 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) I'd prefer VHOST_VDPA_GET_NUM_QUEUES, since we use "num_queues" also in the spec [1]. But I'm fine also with this: Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> [1] https://docs.oasis-open.org/virtio/virtio/v1.1/csprd01/virtio-v1.1-csprd01.html#x1-1120003
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 0c82eb5..69b3f05 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -370,6 +370,16 @@ 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) { @@ -510,6 +520,9 @@ 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) diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h index bc74e95..5d99e7c 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -154,4 +154,7 @@ /* 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) + #endif