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* **Working today**: the virtual device, the GSP boot handshake, the RPC
transport, the resource-manager emulation surface the guest driver needs to
- probe and enumerate, guest `nvidia.ko` and `nvidia-smi`, and the full CUDA
- driver-API path through context creation, allocation and verified copies
- (the driver-API smoke passes).
-* **Needs improvement**: engine execution first — the backend is live and
- CE-class copies and their releases are forwarded to the physical copy engine
- (default off) with a fault relay, but for CUDA kernel execution the guest's
- launch now reaches the front-end and the inline launch-descriptor install has
- not been observed (context validity at dispatch is ruled out; see
- [`../04-implementation/03-execution-frontier.md`](../04-implementation/03-execution-frontier.md))
- — then the remaining reply fidelity (some consumed
- fields are still generic fallbacks), the memory/page-table model, Windows
- guest support, non-KVM hypervisors, and performance instrumentation. Each of
- these is tracked with explicit "known-unknowns" in
+ probe and enumerate, guest `nvidia.ko` and `nvidia-smi`, the full CUDA
+ driver-API path, and **CUDA kernel execution on the physical GPU** —
+ verified guest clients (vector-add, matrix-multiply, transformer) execute on
+ the engine with engine-authored completions relayed to the guest. On the
+ graphics side, the X server and GLX run on the emulated vGPU, the engine
+ executes GL method streams (verbatim 3D replay and synthesized launches),
+ and the guest Vulkan pipeline runs end to end.
+* **Needs improvement**: the staged-transfer class (some large multi-chunk
+ CUDA clients still mis-verify; failure modes proven), the every-boot
+ acceptance campaign, per-guest execution isolation for simultaneous guests,
+ the rendered-pixel frontier for OpenGL/Vulkan (program delivery plus
+ program-VA mapping), the remaining reply fidelity (some consumed fields are
+ still generic fallbacks), Windows guest support, non-KVM hypervisors, and
+ performance instrumentation. Each of these is tracked with explicit
+ "known-unknowns" in
[`../04-implementation/01-known-knowns-and-unknowns.md`](../04-implementation/01-known-knowns-and-unknowns.md);
+ execution detail:
+ [`../04-implementation/03-execution-frontier.md`](../04-implementation/03-execution-frontier.md)
+ and
+ [`../04-implementation/05-graphics-execution-plan.md`](../04-implementation/05-graphics-execution-plan.md);
for the CUDA analysis area, start at
[`../../userspace/cuda/READ-ME-FIRST.md`](../../userspace/cuda/READ-ME-FIRST.md).