From: Gautam Dawar <gautam.dawar@xilinx.com>
Date: Wed, 30 Mar 2022 23:33:52 +0530
Subject: vhost-vdpa: introduce uAPI to get the number of address spaces
Patch-mainline: v5.19-rc1
Git-commit: a0c95f201170bd559737d3cdc8a950aea62f29c6
References: jsc#PED-1549
This patch introduces the uAPI for getting the number of address
spaces supported by this vDPA device.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-13-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/vhost/vdpa.c | 3 +++
include/uapi/linux/vhost.h | 2 ++
2 files changed, 5 insertions(+)
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -563,6 +563,9 @@ static long vhost_vdpa_unlocked_ioctl(st
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;
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -154,4 +154,6 @@
/* Get the number of virtqueue groups. */
#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x81, __u32)
+/* Get the number of address spaces. */
+#define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x7A, unsigned int)
#endif