| Commit message (Collapse) | Author | Age |
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The mdev core's shared parent->available_instances counter leaks whenever
an mdev remove path fails to complete (as happened during the now-fixed
remove crash): creates then fail with -EUSERS while sysfs reports 0
available instances with zero mdevs present.
Implement mdev_driver.get_available to compute availability from the
driver's own authoritative device list instead of the core counter.
Handles the 'nvidia-' prefixed sysfs type names when looking up per-type
max_instances (falls back to 1).
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- install.sh: one-command fresh-Ubuntu reproduction (deps, NVIDIA clone
+ patch, GSP firmware fetch from linux-firmware.git with objcopy
.fwimage extraction + MD5 verify, ordered build, host config, load,
mdev creation). Wrapper-neutral: works with libvirt/raw QEMU.
- patches/nvidia: regenerated path-independent patch (KBUILD_EXTRA_SYMBOLS
resolved via $(src)/$(CURDIR) relative to the NVIDIA tree).
- scripts/stack_manager.sh and helper scripts auto-detect repo root
(OPEN_IOV_ROOT override); no hardcoded developer paths anywhere.
- firmware analysis scripts use script-relative paths (also fixes stale
firmware/570-GSP references); docs/wiki updated to $OPEN_IOV_ROOT.
- .github/workflows/ci.yml updated for standalone repo layout; firmware
fetched from linux-firmware in CI.
- Untrack remaining kbuild artifacts (Module.symvers, modules.order,
*.o.d); gitignore them.
- STATE.md: live project state, limitations, fixed/open bugs.
- README.md: rewritten for clone-and-run reproducibility.
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- Fix vendor/device/subsys ID byte order from vGPU type info
- BAR0: 16MB 32-bit non-prefetchable (matches physical TU104)
- BAR1: 256MB 64-bit prefetchable VRAM (consumes BAR2 upper half)
- BAR3: 32MB 64-bit prefetchable (consumes BAR4 upper half)
- Subsystem vendor/device IDs at correct offsets 0x2C/0x2E
- MSI-X: 32 vectors (table size 31), chain to PCIe cap at 0x80
- Capabilities pointer at 0x34 -> PM at 0x40
- Interrupt pin INTA at 0x3D
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- Removed IOMMU group addition before vfio_register_emulated_iommu_dev() in nv_vgpu_mdev_create()
- Added IOMMUFD callbacks (bind_iommufd, unbind_iommufd, attach_ioas, detach_ioas) using kernel's vfio_iommufd_emulated_* functions
- Implemented VFIO ioctl handlers: GET_INFO, GET_REGION_INFO, GET_IRQ_INFO, SET_IRQS, MMAP
- Added config space read/write handlers at offset 0x70000000000
- Mmap handler for config space, BAR0 (emulation shadow), BAR1-5 (physical VRAM/registers)
- Interrupt handler for VFIO_DEVICE_SET_IRQS (DATA_EVENTFD, DATA_NONE, DATA_BOOL)
- Added udev rules for vfio group permissions
- Created stack_manager.sh unified tool
- Fixed mdev remove crash with deferred cleanup in vfio_device_release callback
- Kernel 6.8+ IOMMUFD compatibility
- QEMU launches successfully with vGPU passthrough
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vGPU type registration
- Implemented nv_vgpu_mdev_register_parent() using mdev_register_parent() API
with nv_vgpu_mdev_types array for proper mdev parent registration
- Added ioctl NV_VGPU_IOCTL_REGISTER_VGPU_TYPE for userspace vGPU type registration
- Created separate header nv-vgpu-vfio-interface-nvidia.h for nvidia.ko
with only extern declarations to avoid duplicate symbol exports
- Used KBUILD_EXTRA_SYMBOLS to provide only needed symbols (nvidia_vgpu_vfio_*)
- Updated create_mdev.sh to use correct mdev type names (pci-nvidia-vgpu-*)
- Updated load_vgpu_stack.sh to load open-iov-vfio.ko before nvidia.ko
Result: 4 mdev types now show available_instances=8, mdev creation successful
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- Firmware Analyzer: Runtime firmware signature computation (CRC32, SHA256) and pattern-based RPC handler address discovery
- Dynamic RPC Dispatcher: Version-aware dispatch with native firmware handlers (550/560/570/580) and emulation fallback
- Hardware Architecture Layer: Turing, Ampere, Blackwell configs with BAR layouts, doorbell offsets, MSI-X vectors
- Driver Version Adaptation Layer: Feature detection per driver version
- Declarative YAML configs for hardware (turing/ampere/blackwell) and versions (550/560/570/580)
- Kernel unit tests for GSP emulation (gsp_emulation_test.c)
- Test infrastructure scripts (test_gsp_emu.sh, test_guest_driver.sh, test_cuda_workloads.sh, test_graphics_workloads.sh, test_windows_guest.sh, test_vgpu_stack.sh)
- Updated kernel Makefile with new source files
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- Enhanced gsp_rpc_client.c with proper emulation implementations:
- ALLOC/FREE: VRAM allocation tracking with host page allocation and DMA mapping
- MAP/UNMAP: GPU VA mapping management
- PIN/UNPIN: DMA address retrieval for pinned pages
- SCHEDULE/YIELD: Local workqueue-based scheduling
- NOTIFY: Callback registration for async events
- Added emulation function declarations to gsp_rpc_client.h
- Exported nv_vgpu_simple_mapping struct in memory.h for cross-file use
- Updated RPC handlers to use gsp_rpc_emulation_is_enabled() accessor
- All 12 RPC types now have functional emulation fallbacks
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- Enhanced PCI config space write handlers in main.c:
- Added MSI-X Message Control (0x72-0x73) write support
- Added MSI-X Table Offset/BIR (0x74-0x77) write support
- Added MSI-X PBA Offset/BIR (0x78-0x7B) write support
- Enhanced BAR emulation in bar_emulation.c:
- Added MSI-X Table emulation (32 entries at BAR0+0x2000)
- Added MSI-X PBA emulation (64-bit at BAR0+0x3000)
- Added nv_vgpu_msix_set_pending/clear_pending for interrupt injection
- Integrated with GSP emulation constants from gsp_emulation.h
- Updated bar_emulation.h with MSI-X struct definitions and function declarations
- Added GSP emulation constants to gsp_emulation.h (MSIX offsets, polling params)
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- New kernel/gsp_emulation.h: GSP emulation context and API
- New kernel/gsp_emulation.c: Per-mdev emulation thread with:
- Adaptive polling of doorbell at BAR0+0x110C00
- Shared memory RPC processing (4KB at BAR0+0x1000)
- Dispatch for all 12 RPC types via firmware-decompiled handlers
- MSI-X completion interrupt injection via eventfd
- Statistics tracking (processed/failed RPCs, latency)
- Modified kernel/main.c: Integrate gsp_emu_init/cleanup in device lifecycle
- Modified kernel/Makefile: Add gsp_emulation.o to build
- Modified kernel/gsp_rpc_client.h: Export gsp_rpc_emulation_set/is_enabled
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- Firmware decompilation: GSP 570.144W (28.5MB ELF, RV64IMAC), 132 decompiled C files
- Kernel modules: nvidia.ko (34MB, OpenRM), open-iov-vfio.ko (2.8MB, VFIO mdev), gsp-vgpu.ko (1.8MB, guest driver)
- Userspace: libiov.so/libvgpu.so (76KB), example_vgpu (28KB), rpc_emulator.c
- PCI config space emulation (256B with PM, MSI, MSI-X, PCIe caps)
- 12 RPC types fully mapped from firmware decompilation
- BAR trap, WPR, scheduling, notification, migration emulation
- Helper scripts: load_vgpu_stack, create_mdev, launch_qemu_vgpu, test_vgpu_stack, setup_guest_driver, unload_vgpu_stack
- Architecture documentation
- Wiki: 10 technical documents
- Git LFS for large binaries (.ko, .bin, .iso, .img, .o, ghidra repos)
- nvidia-open-gpu-kernel-modules as submodule
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