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

1 files changed, 6 insertions, 1 deletions

diff --git a/host-common/opengl/GLProcessPipe.cpp b/host-common/opengl/GLProcessPipe.cpp
index 7ff32983..d2da1a22 100644
--- a/host-common/opengl/GLProcessPipe.cpp
+++ b/host-common/opengl/GLProcessPipe.cpp
@@ -89,7 +89,12 @@ public:
             m_uniqueId = loadStream->getBe64();
             m_hasData = (loadStream->getByte() != 0);
         } else {
-            m_uniqueId = ++s_headId;
+            if (flags & ANDROID_PIPE_VIRTIO_GPU_BIT) {
+                m_uniqueId = (uint64_t)(uintptr_t)hwPipe;
+                s_headId = m_uniqueId;
+            } else {
+                m_uniqueId = ++s_headId;
+            }
         }
         AutoLock lock(sRegistry.lock);
         sRegistry.ids.insert(m_uniqueId);