diff options
| author | Gautam Dawar <gautam.dawar@xilinx.com> | 2022-03-30 20:03:49 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-05-31 18:44:29 +0200 |
| commit | 91233ad711866f4e375742d84ef3ed6aab9daa96 (patch) | |
| tree | ec745c48fc32434571ad37553b3843c6e07c1372 /drivers/vhost/vdpa.c | |
| parent | vhost_iotlb: split out IOTLB initialization (diff) | |
| download | linux-91233ad711866f4e375742d84ef3ed6aab9daa96.tar.xz linux-91233ad711866f4e375742d84ef3ed6aab9daa96.zip | |
vhost: support ASID in IOTLB API
This patches allows userspace to send ASID based IOTLB message to
vhost. This idea is to use the reserved u32 field in the existing V2
IOTLB message. Vhost device should advertise this capability via
VHOST_BACKEND_F_IOTLB_ASID backend feature.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-10-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost/vdpa.c')
| -rw-r--r-- | drivers/vhost/vdpa.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 9202ff97ddb5..174c9e81df4e 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -870,7 +870,7 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v, msg->perm); } -static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, +static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, u32 asid, struct vhost_iotlb_msg *msg) { struct vhost_vdpa *v = container_of(dev, struct vhost_vdpa, vdev); @@ -879,6 +879,9 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, struct vhost_iotlb *iotlb = v->iotlb; int r = 0; + if (asid != 0) + return -EINVAL; + mutex_lock(&dev->mutex); r = vhost_dev_check_owner(dev); |