From 68cdd7728a7cc6715bbbff7decfe2b11c3bdf558 Mon Sep 17 00:00:00 2001 From: Open-IOV Date: Wed, 23 Sep 2026 05:44:08 -0400 Subject: Open-IOV: initial public release 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. --- kernel/include/migration.h | 75 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 kernel/include/migration.h (limited to 'kernel/include/migration.h') diff --git a/kernel/include/migration.h b/kernel/include/migration.h new file mode 100644 index 0000000..17cf8db --- /dev/null +++ b/kernel/include/migration.h @@ -0,0 +1,75 @@ +#ifndef _NV_VGPU_MIGRATION_H_ +#define _NV_VGPU_MIGRATION_H_ + +#include "nvidia-vgpu-vfio.h" + +#define NV_VGPU_MIGRATION_MAGIC 0x4E564750 +#define NV_VGPU_MIGRATION_VERSION 1 + +struct nv_vgpu_migration_ctx { + struct nv_vgpu_device *vgpu; + struct mutex lock; + struct nv_vgpu_migration_state state; + struct task_struct *save_thread; + struct task_struct *restore_thread; + bool in_progress; +}; + +struct nv_vgpu_migration_header { + u32 magic; + u32 version; + u32 flags; + u32 num_sections; + u64 total_size; + u64 timestamp; +}; + +enum nv_vgpu_migration_section_type { + NV_VGPU_MIG_SECTION_DEVICE_STATE = 0x01, + NV_VGPU_MIG_SECTION_BAR_STATE = 0x02, + NV_VGPU_MIG_SECTION_MEMORY_STATE = 0x03, + NV_VGPU_MIG_SECTION_IRQ_STATE = 0x04, + NV_VGPU_MIG_SECTION_GSP_STATE = 0x05, + NV_VGPU_MIG_SECTION_ENGINE_STATE = 0x06, + NV_VGPU_MIG_SECTION_CHANNEL_STATE = 0x07, + NV_VGPU_MIG_SECTION_CONTEXT_STATE = 0x08, +}; + +struct nv_vgpu_migration_section { + u32 type; + u32 flags; + u64 offset; + u64 size; + u32 checksum; +}; + +struct nv_vgpu_migration_device_state { + u32 vgpu_type; + u32 vgpu_id; + u32 gpu_instance_id; + u32 compute_instance_id; + u32 state; + u64 fb_base; + u64 fb_size; + u64 bar0_config_base; +}; + +struct nv_vgpu_migration_bar_state { + u32 bar_index; + u64 gpa; + u64 size; + u64 iova; + u8 data[]; +}; + +int nv_vgpu_migration_init(struct nv_vgpu_device *vgpu); +void nv_vgpu_migration_cleanup(struct nv_vgpu_device *vgpu); + +int nv_vgpu_migration_save_state(struct nv_vgpu_device *vgpu, u8 **data, size_t *size); +int nv_vgpu_migration_restore_state(struct nv_vgpu_device *vgpu, u8 *data, size_t size); + +int nv_vgpu_migration_prepare(struct nv_vgpu_device *vgpu); +int nv_vgpu_migration_complete(struct nv_vgpu_device *vgpu); +int nv_vgpu_migration_cancel(struct nv_vgpu_device *vgpu); + +#endif \ No newline at end of file -- cgit v1.2.3