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- GSP_RM_ALLOC: echo the request payload back with status forced to NV_OK.
The kernel driver copies the reply params over the caller's params buffer
using the class-expected size, so a zeroed reply smashed libcuda's stack
(SIGSEGV at the engine-registration continuation); echoing makes the
copy-back idempotent.
- CE_GET_PHYSICAL_CAPS / CE_GET_ALL(_PHYSICAL)_CAPS: report sysmem, P2P and
BL copy caps and mark the GR-synchronous CE (GRCE, COPY0). Without a GRCE
the client's context walk ends with an empty secondary-engine record and
the engine RM alloc is issued with class 0 (rejected -> cuCtxCreate fails).
- TU104 engine table: CE0 shares the GR PBDMA ids (the driver's GR/GRCE
runqueue validation requires it), plus an entry for the async copy engine
(COPY14) advertised in the GSP static info engine caps.
- tools/guest-diag/ioctl_trace: decode the RM status fields of alloc,
control and free so the first failing driver call is visible in traces.
gitignore: keep the CUDA analysis scratch tree (incl. WORKING-HERE.md) local.
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Open-IOV virtualizes NVIDIA GPUs so that unmodified guest drivers run with
real GPU functionality - CUDA first, 3D and video to follow - on unmodified
hosts, without a proprietary vGPU license and without patching any driver,
firmware or hypervisor.
Core principle: emulate the interface, pass through the work.
kernel/ open-iov-vfio.ko - host VFIO mdev driver: virtual GPU device
(PCI config space, BAR shadows, MSI-X), GSP boot emulation,
GSP-RM message-queue/RPC emulation, memory model (GPU-VA to
guest-PA discovery) and the semaphore-completion service that
advances guest UVM progress.
userspace/ libiov.so management API and examples.
tools/ guest diagnostics, firmware analysis wrappers, RM probes.
scripts/ stack manager, VM harness, build/load/test automation.
config/ hardware/version profiles (the portability surface).
docs/ documentation tree - start at docs/README.md.
wiki/ long-form firmware and protocol deep dives.
Status: initialization works end to end for a stock 570.144 Linux guest on
Turing (TU104): driver probe, nvidia-smi, the full GSP-RM control battery,
object creation and the early CUDA/UVM start-up path. GPU work forwarding -
the step that makes CUDA kernels execute on real hardware - is the active
work item; see docs/04-implementation/01-known-knowns-and-unknowns.md.
License: BSD-3-Clause for the project; GPL-2.0 for kernel modules that link
GPL-only kernel interfaces. See LICENSE and docs/09-reference/legal-and-licensing.md.
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