lkml.org 
[lkml]   [2022]   [Feb]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC PATCH v2 11/19] vhost-vdpa: introduce uAPI to get the number of virtqueue groups
    Date
    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 <gdawar@xilinx.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 4e8b7c4809cd..7a8a99cef8a4 100644
    --- a/drivers/vhost/vdpa.c
    +++ b/drivers/vhost/vdpa.c
    @@ -538,6 +538,10 @@ 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 59c6c0fbaba1..8a4e6e426bbf 100644
    --- a/include/uapi/linux/vhost.h
    +++ b/include/uapi/linux/vhost.h
    @@ -145,4 +145,7 @@
    /* Get the valid iova range */
    #define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \
    struct vhost_vdpa_iova_range)
    +/* Get the number of virtqueue groups. */
    +#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x79, unsigned int)
    +
    #endif
    --
    2.25.0
    \
     
     \ /
      Last update: 2022-02-24 22:28    [W:3.220 / U:0.020 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site