diff options
| author |   Si-Wei Liu <si-wei.liu@oracle.com> | 2023-10-21 02:25:17 -0700 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2023-11-01 09:20:00 -0400 |
| commit | bc91df5c70ac720eca18bd1f4a288f2582713d3e (patch) | |
| tree | 78c8529cfc86aa5e19ff61921feeb3db5bde81bc /drivers/virtio | |
| parent | vdpa: introduce .compat_reset operation callback (diff) | |
| download | wireguard-linux-bc91df5c70ac720eca18bd1f4a288f2582713d3e.tar.xz wireguard-linux-bc91df5c70ac720eca18bd1f4a288f2582713d3e.zip | |
vhost-vdpa: clean iotlb map during reset for older userspace
Using .compat_reset op from the previous patch, the buggy .reset
behaviour can be kept as-is on older userspace apps, which don't ack the
IOTLB_PERSIST backend feature. As this compatibility quirk is limited to
those drivers that used to be buggy in the past, it won't affect change
the behaviour or affect ABI on the setups with API compliant driver.
The separation of .compat_reset from the regular .reset allows
vhost-vdpa able to know which driver had broken behaviour before, so it
can apply the corresponding compatibility quirk to the individual driver
whenever needed. Compared to overloading the existing .reset with
flags, .compat_reset won't cause any extra burden to the implementation
of every compliant driver.
[mst: squashed in two fixup commits]
Message-Id: <1697880319-4937-6-git-send-email-si-wei.liu@oracle.com>
Message-Id: <1698102863-21122-1-git-send-email-si-wei.liu@oracle.com>
Reported-by: Dragos Tatulea <dtatulea@nvidia.com>
Tested-by: Dragos Tatulea <dtatulea@nvidia.com>
Message-Id: <1698275594-19204-1-git-send-email-si-wei.liu@oracle.com>
Reported-by: Lei Yang <leiyang@redhat.com>
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_vdpa.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index 06ce6d8c2e00..8d63e5923d24 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -100,7 +100,7 @@ static void virtio_vdpa_reset(struct virtio_device *vdev) { struct vdpa_device *vdpa = vd_get_vdpa(vdev); - vdpa_reset(vdpa); + vdpa_reset(vdpa, 0); } static bool virtio_vdpa_notify(struct virtqueue *vq) |