David Reveman 22272dd4b2 virtwl: implement dmabuf sync support ... This provides proper synchronization for guest access to DMABufs. Virtio wayland device is given access to the DMA_BUF_SYNC ioctl in order to implement this. Being able to use this directly in the virtio wayland device process is important as these calls can sometimes be relatively expensive and they are frequent enough that avoiding another context switch is useful for good performance. TEST=cache-line artifacts no longer noticeable BUG=chromium:837209 Change-Id: Ibb8d7c01f70ed5b74afd69288015a65186fec52a Reviewed-on: https://chromium-review.googlesource.com/1076928 Commit-Ready: David Reveman <reveman@chromium.org> Tested-by: David Reveman <reveman@chromium.org> Reviewed-by: Zach Reizner <zachr@chromium.org>		2018-06-19 14:38:53 -07:00
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balloon_device.policy	devices: use PollContext for all virtio deivces	2018-04-05 15:20:42 -07:00
block_device.policy	qcow: Call fsync(2) when we want to flush to disk	2018-05-18 20:08:31 -07:00
net_device.policy	devices: use PollContext for all virtio deivces	2018-04-05 15:20:42 -07:00
rng_device.policy	devices: use PollContext for all virtio deivces	2018-04-05 15:20:42 -07:00
vhost_net_device.policy	devices: use PollContext for all virtio deivces	2018-04-05 15:20:42 -07:00
vhost_vsock_device.policy	devices: use PollContext for all virtio deivces	2018-04-05 15:20:42 -07:00
wl_device.policy	virtwl: implement dmabuf sync support	2018-06-19 14:38:53 -07:00