On Tue, Sep 21, 2021 at 04:20:23PM -0700, Gurchetan Singh wrote: > Similar to DRM_VMW_EVENT_FENCE_SIGNALED. Sends a pollable event > to the DRM file descriptor when a fence on a specific ring is > signaled. > > One difference is the event is not exposed via the UAPI -- this is > because host responses are on a shared memory buffer of type > BLOB_MEM_GUEST [this is the common way to receive responses with > virtgpu]. As such, there is no context specific read(..) > implementation either -- just a poll(..) implementation. > > Signed-off-by: Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx> > Acked-by: Nicholas Verne <nverne@xxxxxxxxxxxx> > --- > drivers/gpu/drm/virtio/virtgpu_drv.c | 43 +++++++++++++++++++++++++- > drivers/gpu/drm/virtio/virtgpu_drv.h | 7 +++++ > drivers/gpu/drm/virtio/virtgpu_fence.c | 10 ++++++ > drivers/gpu/drm/virtio/virtgpu_ioctl.c | 34 ++++++++++++++++++++ > 4 files changed, 93 insertions(+), 1 deletion(-) This commit seems to cause a crash in a virtual drm gpu driver for Android. I have reverted this, and the next commit in the series from Linus's tree and all is good again. Any ideas? thanks, greg k-h
