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diff --git a/wiki/FAQ.md b/wiki/FAQ.md new file mode 100644 index 0000000..9472740 --- /dev/null +++ b/wiki/FAQ.md @@ -0,0 +1,102 @@ +# FAQ + +> **What this page is.** The questions the project is asked most, answered +> honestly and with pointers to the maintained documents. Condensed from +> [`../docs/09-reference/glossary-and-faq.md`](../docs/09-reference/glossary-and-faq.md); +> the docs tree wins on disagreement. + +Status: 2026-10-12, tree `master @ 2f066727`. + +## Project and positioning + +**Is this a replacement for vLLM on bare metal?** +No. Continuous batching on a bare-metal host is the right answer for +centralized inference, and it stays that way. Open-IOV is for compute *inside +guests*: Linux and Windows CUDA, 3D, video, and secure edge isolation. + +**Does the guest driver need to be patched?** +No, and that is a hard project rule: no guest driver patches, no host driver +patches, no firmware patches, no hypervisor patches. The guest runs the stock +NVIDIA driver, unmodified. + +**Does the host driver need to be patched or replaced?** +No. In the standalone configuration the distribution driver owns the physical +GPU and Open-IOV is an independent kernel module. Building NVIDIA's OpenRM +modules from source is needed only for the native vGPU-management workflows, +not for the QEMU/emulated path +([`Install-and-First-Run.md`](Install-and-First-Run.md) §2). + +**Why is `nvidia-smi` working but my CUDA kernel not running?** +Because execution is the frontier, not the setup. Today, a stock guest driver +probes, `nvidia-smi` works, device enumeration works, and the full CUDA +**driver-API** path (context creation, allocation, copies, free, destroy) +completes; a guest **kernel launch** is forwarded to the physical engine queue +but the engine does not yet execute the forwarded launch descriptor +(`[wall]`). This is the project's known status, not a misconfiguration — see +[`Project-Status.md`](Project-Status.md) and +[`Execution-Frontier.md`](Execution-Frontier.md). + +**How fast is it?** +No published numbers yet. Copy-engine-class forwarding and its completion and +fault relay are implemented (default off) and GR execution is the open +frontier; even the initialization path has not yet been measured under the +project's methodology. Any performance claim will ship together with its +methodology and measurements. + +## Compatibility + +**Will it support Windows guests?** +Yes, it is a target: same architecture, measured bring-up. +[`Hardware-Software-Matrix.md`](Hardware-Software-Matrix.md) lists the +support ladder. + +**Can I run several VMs on one GPU?** +That is a core design goal: one mediated device per VM, IOMMU isolation, and +explicit scheduling at the GPU's memory-management unit. Multi-tenant maturity +depends on the scheduling and isolation work tracked in the project's +known-unknowns document. + +**Does it support Xen / Qubes OS Air / Argo / OpenXT?** +Designed for them. The emulation core is hypervisor-independent by +construction; the transport backends are on the roadmap. KVM/QEMU with VFIO +mdev is the reference transport today. + +**What about MIG?** +MIG is a hardware partitioning mechanism; the project's scheduling policy can +use it where available. It is part of the multi-tenancy work. + +**Which GPUs are supported?** +Turing TU104 is the reference platform. Other generations are targets or +experimental combinations — see +[`Hardware-Software-Matrix.md`](Hardware-Software-Matrix.md) for the exact +ladder and what each status means. + +## Legal and licensing + +**How is this legal / license-clean?** +Open-IOV's own code is BSD-3-Clause (GPL-2.0 for the kernel modules that link +GPL-only kernel exports); NVIDIA's software is used unmodified and is not +redistributed. The project interoperates with the interfaces rather than +relicensing anything. Details: the repository `LICENSE` and the legal +reference in `docs/09-reference/`. + +**Can my company use this commercially?** +Yes, under BSD-3-Clause (kernel modules GPL-2.0), with no fee. Co-development +is welcome — see [`HAAEEP-and-Collaboration.md`](HAAEEP-and-Collaboration.md). + +## Contributing + +**Where do I report bugs or ask for help?** +Open an issue in the repository with a reproduction and the standard captures +(host dmesg, guest dmesg, guest `lspci -vvv`, guest driver parameters). A +reproduction plus logs is worth more than a description. + +**How do I contribute support for my GPU / driver / hypervisor?** +Start from [`Hardware-Software-Matrix.md`](Hardware-Software-Matrix.md) and +the portability workflow in the repository. The deliverable is a profile plus +evidence from the project's evaluation ladder. + +**How do I debug the firmware side?** +The risc-v-gsp-rm-debugger workbench runs GSP firmware in a RISC-V virtual +machine with hooks, watchpoints and recorded sessions — +[`Riscv-GSP-RM-Debugger.md`](Riscv-GSP-RM-Debugger.md). |
