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Date: Thu, 24 Sep 2020 11:21:16 +0800 From: Jason Wang <jasowang@...hat.com> To: mst@...hat.com, jasowang@...hat.com Cc: lulu@...hat.com, kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, rob.miller@...adcom.com, lingshan.zhu@...el.com, eperezma@...hat.com, hanand@...inx.com, mhabets@...arflare.com, eli@...lanox.com, amorenoz@...hat.com, maxime.coquelin@...hat.com, stefanha@...hat.com, sgarzare@...hat.com Subject: [RFC PATCH 15/24] vhost-vdpa: introduce uAPI to get the number of address spaces A new uAPI is introduced for the userspace to know the address spaces that is supported by a specific device. Signed-off-by: Jason Wang <jasowang@...hat.com> --- drivers/vhost/vdpa.c | 3 +++ include/uapi/linux/vhost.h | 2 ++ 2 files changed, 5 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 4b8882f55bc9..4d97a59824a1 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -532,6 +532,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, r = copy_to_user(argp, &v->vdpa->ngroups, sizeof(v->vdpa->ngroups)); break; + case VHOST_VDPA_GET_AS_NUM: + r = copy_to_user(argp, &v->vdpa->nas, sizeof(v->vdpa->nas)); + 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 19f1acdfe3ea..99bdf50efc50 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -145,4 +145,6 @@ /* Get the number of virtqueue groups. */ #define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x78, unsigned int) +/* Get the number of address spaces. */ +#define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x79, unsigned int) #endif -- 2.20.1
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