tree 983058a4fc92290722dcc7501a4675b444208133
parent da84145011df1f2eb3bedee0fb8d52f1a0c13c7c
author Gurchetan Singh <gurchetansingh@chromium.org> 1647554152 -0700
committer Gurchetan Singh <gurchetansingh@google.com> 1647564053 -0700

vulkan-cereal: plumb virtgpu ctx_id to process pipe

The virtio-gpu context ID is an unique identifier allocated by the
guest kernel, via idr_alloc(..).  These IDs can be reused, but
virtio-gpu gurantees that re-use will only happens after a
particular context has been destroyed.

Many operations related to resource sharing between guest
processes, and between gfxstream and virtgpu are done in reference
to this context id.

gfxstream has a clear analogue to this already --> m_puid, which
is set via connecting to the "pipe:GLProcessPipe" service in the
guest.

The immediate goal is is make m_puid == ctx_id, so the guest
kernel can reference each host render thread via the ctx_id.

BUG=202552093
TEST=run Cuttlefish

Change-Id: Iadc0c288be6a869261658db87c5c569389f73f5b