kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

vhost: support ASID in IOTLB API

Browse source 
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>
This commit is contained in:
Gautam Dawar 2022-03-30 23:33:49 +05:30 • committed by Michael S. Tsirkin
parent 1cb108994c
commit 91233ad711
4 changed files with 29 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

6
include/uapi/linux/vhost_types.h
View file

@ -87,7 +87,7 @@ struct vhost_msg {
struct vhost_msg_v2 {
__u32 type;
__u32 reserved;
__u32 asid;
union {
struct vhost_iotlb_msg iotlb;
__u8 padding[64];
@ -157,5 +157,9 @@ struct vhost_vdpa_iova_range {
#define VHOST_BACKEND_F_IOTLB_MSG_V2 0x1
/* IOTLB can accept batching hints */
#define VHOST_BACKEND_F_IOTLB_BATCH 0x2
/* IOTLB can accept address space identifier through V2 type of IOTLB
* message
*/
#define VHOST_BACKEND_F_IOTLB_ASID 0x3
#endif