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| author | Jason Wang <jasowang@redhat.com> | 2020-09-07 18:49:03 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-09-29 02:14:29 -0400 |
| commit | a5bd05800f8659851d9d0a1546726e16b7da9db3 (patch) | |
| tree | 5188269fbdeb733e563d73f743dc374f5404c825 /hw/semihosting | |
| parent | b37556edec8372bef83959901fc142a272a7e1fa (diff) | |
| download | qemu-a5bd05800f8659851d9d0a1546726e16b7da9db3.zip | |
vhost-vdpa: batch updating IOTLB mappings
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>
Diffstat (limited to 'hw/semihosting')
0 files changed, 0 insertions, 0 deletions