motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

vhost-vdpa: batch updating IOTLB mappings

Browse source 
To speed up the memory mapping updating between vhost-vDPA and vDPA
device driver, this patch passes the IOTLB batching flags via IOTLB
API. Two new flags was introduced, VHOST_IOTLB_BATCH_BEGIN is a hint
that a bathced IOTLB updating may be initiated from the
userspace. VHOST_IOTLB_BATCH_END is a hint that userspace has finished
the updating:

VHOST_IOTLB_BATCH_BEGIN
VHOST_IOTLB_UPDATE/VHOST_IOTLB_INVALIDATE
...
VHOST_IOTLB_BATCH_END

Vhost-vDPA can then know that all mappings has been set and can do
optimization like passing all the mappings to the vDPA device driver.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20200907104903.31551-4-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2020-09-07 18:49:03 +08:00 • committed by Michael S. Tsirkin
parent b37556edec
commit a5bd05800f
2 changed files with 67 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/hw/virtio/vhost-vdpa.h
View file

@ -18,6 +18,7 @@ typedef struct vhost_vdpa {
int device_fd;
uint32_t msg_type;
MemoryListener listener;
struct vhost_dev *dev;
} VhostVDPA;
extern AddressSpace address_space_memory;