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authorOpen-IOV <dev@open-iov.org>2026-09-23 05:44:08 -0400
committerOpen-IOV <dev@open-iov.org>2026-09-23 05:46:43 -0400
commit68cdd7728a7cc6715bbbff7decfe2b11c3bdf558 (patch)
tree3dc8ce2e6af313a97ec6852f5c663a9a93665d2e /wiki/open-iov.org/index.php?title=GPU_Software_Bill_Of_Materials_(SBOM)&action=edit.html
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open-iov-68cdd7728a7cc6715bbbff7decfe2b11c3bdf558.zip
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.
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+</p><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="en" dir="ltr" name="wpTextbox1">This page will keep a running list of components used to achieve GPU Virtualization.&lt;blockquote>An absence of critical technical documentation has historically slowed growth and adoption of developer ecosystems for GPU virtualization.
+
+This [https://creativecommons.org/licenses/by/4.0/ CC-BY-4.0] licensed content can either be used with attribution, or used as inspiration for new documentation, created by GPU vendors for public commercial distribution as developer documentation.
+
+Where possible, this documentation will clearly label dates and versions of observed-but-not-guaranteed behaviour vs. vendor-documented stable interfaces/behaviour with guarantees of forward or backward compatibility.&lt;/blockquote>
+{| class="wikitable"
+|+Component Table
+!Vendor
+!Component
+!Description
+!Version
+!OSS or Blob
+!Filesize
+!Vendor Docs
+!Release Date
+!Interfaces / APIs
+!Notes
+|-
+|Microsoft
+|Indirect Display Driver (IDD)
+|Driver
+|
+|[https://github.com/Microsoft/Windows-driver-samples/tree/main/video/IndirectDisplay OSS]
+|
+|[https://learn.microsoft.com/en-us/windows-hardware/drivers/display/indirect-display-driver-model-overview Indirect Display Driver Overview]
+|
+|[https://learn.microsoft.com/en-us/windows-hardware/drivers/wdf/overview-of-the-umdf UMDF], [https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/ KMDF]
+|The Indirect Display Driver (IDD) enables GPUs to render graphics at arbitrary resolutions without a physical display connected on Windows OS systems.
+|-
+| rowspan="2" |RedHat
+|vfio_pci
+|Driver
+|6.2-rc1
+|[https://github.com/torvalds/linux/tree/master/drivers/vfio/pci OSS]
+|in-kernel
+|[https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-pci_passthrough RedHat], [https://docs.kernel.org/driver-api/vfio.html kernel.org]
+|2022.12.15
+|[https://open-iov.org/index.php/Virtual_I/O_Internals#Instruction_Execution irqfd], [https://open-iov.org/index.php/Virtual_I/O_Internals#Instruction_Execution ioeventfd], [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL]
+|Reference VFIO Stub driver used for discrete assignment of IO, and assignment of some SR-IOV-backed vGPU devices into virtual machines. This driver is commonly replaced with a vendor built VFIO interface with differing memory management and/or page pinning mechanisms which are specific to the vGPU software internals.
+|-
+|Mediated Core (mdev.ko)
+|Driver
+|6.2-rc1
+|OSS
+|0.044 MB
+|[https://docs.kernel.org/driver-api/vfio-mediated-device.html kernel.org]
+|2016.xx.xx
+|[https://open-iov.org/index.php/Virtual_I/O_Internals#Instruction_Execution irqfd], [https://open-iov.org/index.php/Virtual_I/O_Internals#Instruction_Execution ioeventfd], [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL], [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_DMA_Translations Type 1 IOMMU]
+|The Mediated Core driver provides a common interface for mediated device management that can be used by drivers of different devices. It is an IOMMU/device-agnostic framework for exposing direct device access to user space in a secure, IOMMU-protected environment (based on VFIO).
+|-
+| rowspan="2" |
+|guest communication daemon
+| rowspan="2" |Daemon
+|0.1.0
+|[https:// OSS]
+|
+|[ ]
+|2023.02.08
+|[https://fedoraproject.org/wiki/Features/VirtioSerial Virtio-Serial], CLI
+|Handles IO to and from guests and the host using Virtio-Serial to handle multiple different guest modules.
+|-
+|mdev management CLI
+|1.0
+|[https:// OSS]
+|0.084 MB
+|[ ]
+|2023.01.06
+|CLI, [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL], [https://open-iov.org/index.php/GPU_Driver_Internals#RM_API RMAPI], [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_Core Mediated Core]
+|Configures the the [https://open-iov.org/index.php/GPU_Driver_Internals#nvidia-vgpu-mgr nvidia-vgpu-mgr] process.
+|-
+| rowspan="4" |Intel
+|i915 SR-IOV
+|Driver
+| rowspan="3" |[https://github.com/intel/linux-intel-lts/tree/5.15/ADL-linux-ER 5.15]
+|OSS
+|in-kernel
+|
+|
+|
+|Intel's open source GPU driver for [https://open-iov.org/index.php/GPU_Firmware#GuC GuC]-equipped graphics accelerators.
+|-
+|[https://open-iov.org/index.php/GPU_Firmware#GuC GuC] μOS
+| rowspan="2" |Firmware
+| rowspan="2" |Blob
+|
+|
+|
+|IOMMU Interrupts, Power Management Interrupts, [https://open-iov.org/index.php/GPU_Driver_Internals#GTT_(Graphics_Translation_Table) GTT]
+|Handles scheduling, and power management.
+|-
+|HuC
+|
+|
+|
+|[https://open-iov.org/index.php/GPU_Driver_Internals#GTT_(Graphics_Translation_Table) GTT]
+|Handles video encoding/decoding.
+|-
+|[https://open-iov.org/index.php/GPU_Driver_Internals#Display_Surface_Virtualization_2 Display Virtualization for Windows OS]
+|Driver
+|[https://github.com/intel/Display-Virtualization-for-Windows-OS/releases/ 791]
+|[https://github.com/intel/Display-Virtualization-for-Windows-OS OSS]
+|
+|[https://github.com/intel/Display-Virtualization-for-Windows-OS/blob/main/Readme.txt github.com/intel/Display-Virtualization-for-Windows-OS/blob/main/Readme.txt]
+|
+|[https://github.com/ikwzm/udmabuf udmabuf], [https://learn.microsoft.com/en-us/windows-hardware/drivers/wdf/overview-of-the-umdf UMDF], [https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/ KMDF]
+|Intel's 'Display Virtualization for Windows OS' provides a virtual pixel surface used for hardware graphics rendering using Microsoft's open source 'Indirect Display Driver (IDD)'. Display virtualization for Windows OS makes use of display memory sharing primitives provided in-driver by the i915 host.
+|-
+| rowspan="7" |Nvidia
+|[[OpenRM]]
+|Driver
+| rowspan="2" |525.85.12
+|OSS
+|
+|[https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/README.md github.com/NVIDIA/open-gpu-kernel-modules/blob/main/README.md]
+|2023.01.31
+|
+|Nvidia's open source GPU driver for [https://open-iov.org/index.php/GPU_Firmware#GSP GSP]-equipped graphics accelerators.
+|-
+|[https://open-iov.org/index.php/GPU_Firmware#GSP GSP] RM (uproc)
+| rowspan="2" |Firmware
+| rowspan="2" |Blob
+|
+|
+|2023.01.31
+|RPC
+|Embedded firmware based on [https://lwn.net/Articles/637658/ LibOS] containing the [https://open-iov.org/index.php/GPU_Driver_Internals#RM_Core RM Core].
+|-
+|Falcon/NvRISC (uproc)
+|
+|
+|
+|
+|FBIF (Frame Buffer Interface) / GMMU
+|Embedded firmware which handles many aspects of the device including configuring the GPU's GMMU controller.
+|-
+|nvidia-vgpud
+| rowspan="2" |Daemon
+| rowspan="4" |[https://docs.nvidia.com/grid/15.0/whats-new-vgpu/index.html v15.2]
+| rowspan="4" |Blob
+|0.108 MB
+| rowspan="4" |[https://docs.nvidia.com/grid/index.html docs.nvidia.com/grid]
+|2023.01.xx
+|CLI, [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL], [https://open-iov.org/index.php/GPU_Driver_Internals#RM_API RMAPI], [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_Core Mediated Core]
+|Configures the the [https://open-iov.org/index.php/GPU_Driver_Internals#nvidia-vgpu-mgr nvidia-vgpu-mgr] process.
+|-
+|nvidia-vgpu-mgr
+|0.132 MB
+|2023.01.xx
+|[https://open-iov.org/index.php/GPU_Driver_Internals#vmiop vmiop], [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL], [https://open-iov.org/index.php/GPU_Driver_Internals#RM_API RMAPI], [https://open-iov.org/index.php/GPU_Driver_Internals#Guest_kernel_(nvidia.ko) vRPC], pRPC, [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_Core Mediated Core]
+|Handles IO to and from guest RM, host RM, and hardware.
+|-
+|libnvidia-vgpu.so
+|Library
+|3.1 MB
+|2023.01.xx
+|[https://open-iov.org/index.php/GPU_Driver_Internals#vmiop vmiop], [https://open-iov.org/index.php/GPU_Driver_Internals#RM_API RMAPI], [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_Core Mediated Core]
+|Handles IO to and from guest RM, host RM, and hardware. Contains circular dependancies with [https://open-iov.org/index.php/GPU_Driver_Internals#nvidia-vgpu-mgr nvidia-vgpu-mgr].
+|-
+|nvidia-vgpu-vfio.ko
+|Driver
+|0.108 MB
+|2023.01.xx
+|[https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_DMA_Translations Type 1 IOMMU], [https://open-iov.org/index.php/Virtual_I/O_Internals#Instruction_Execution irqfd, ioeventfd], [https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/tree/Documentation/driver-api/ioctl.rst IOCTL], [https://open-iov.org/index.php/Virtual_I/O_Internals#Mediated_Core Mediated Core]
+|Handles incremental memory mapping (non-page pinning per the standard vfio-pci driver).
+|}
+
+== More Information ==
+
+# [https://riscv.org/wp-content/uploads/2016/07/Tue1100_Nvidia_RISCV_Story_V2.pdf Nvidia RISC-V Story]
+# [ ]
+#[https://01.org/linuxgraphics/documentation/hardware-specification-prms Intel Graphics Programmer's Reference Manuals (PRM)]
+#[https://bwidawsk.net/blog/2013/1/i915-hardware-contexts-and-some-bits-about-batchbuffers/ i915: Hardware Contexts (and some bits about batchbuffers)]
+#[https://bwidawsk.net/blog/2014/6/the-global-gtt-part-1/ i915: The Global GTT Part 1]
+#[https://bwidawsk.net/blog/2014/6/aliasing-ppgtt-part-2/ i915: Aliasing PPGTT Part 2]
+#[https://bwidawsk.net/blog/2014/7/true-ppgtt-part-3/ i915: True PPGTT Part 3]
+#[https://bwidawsk.net/blog/2014/7/future-ppgtt-part-4-dynamic-page-table-allocations-64-bit-address-space-gpu-mirroring-and-yeah-something-about-relocs-too/ i915: Future PPGTT Part 4 (Dynamic page table allocations, 64 bit address space, GPU "mirroring", and yeah, something about relocs too)]
+#[https://igor-blue.github.io/2021/02/10/graphics-part1.html i915: Security of the Intel Graphics Stack - Part 1 - Introduction]
+#[https://igor-blue.github.io/2021/02/24/graphics-part2.html i915: Security of the Intel Graphics Stack - Part 2 - FW &lt;-> GuC]
+#[https://01.org/sites/default/files/documentation/an_introduction_to_intel_gvt-g_for_external.pdf i915: An Introduction to Intel GVT-g (with new architecture)]
+</textarea><div class="templatesUsed"></div><p id="mw-returnto">Return to <a href="index.php/GPU_Software_Bill_Of_Materials_(SBOM).html" title="GPU Software Bill Of Materials (SBOM)">GPU Software Bill Of Materials (SBOM)</a>.</p>
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