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SubjectRe: [PATCH 12/21] vhost-vdpa: introduce uAPI to get the number of virtqueue groups
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On 2020/12/30 下午6:05, Eli Cohen wrote:
> On Wed, Dec 16, 2020 at 02:48:09PM +0800, Jason Wang wrote:
>> 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>
>> ---
>> drivers/vhost/vdpa.c | 4 ++++
>> include/uapi/linux/vhost.h | 3 +++
>> 2 files changed, 7 insertions(+)
>>
>> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
>> index 060d5b5b7e64..1ba5901b28e7 100644
>> --- a/drivers/vhost/vdpa.c
>> +++ b/drivers/vhost/vdpa.c
>> @@ -536,6 +536,10 @@ 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;
> Is this and other ioctls already supported in qemu?


Not yet, the prototype is under development.

I test the series with a small and dedicated userspace program.

Thanks


>

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