[v8,00/28] vfio-user client

Message

John Levon Feb. 19, 2025, 2:48 p.m. UTC

This is the 8th revision of the vfio-user client implementation. The vfio-user
protocol allows for implementing (PCI) devices in another userspace process;
SPDK is one example, which includes a virtual NVMe implementation.

The vfio-user framework consists of 3 parts:
 1) The VFIO user protocol specification.
 2) A client - the VFIO device in QEMU that encapsulates VFIO messages
    and sends them to the server.
 3) A server - a remote process that emulates a device.

This patchset implements parts 1 and 2.

It has been tested against libvfio-user test servers as well as SPDK.

Thanks for previous reviews & comments.

Changes since v7:

 - split up pci patches for easier reviewing
 - fixed lots of device ops error handling
 - vfio-user code now in hw/vfio-user
 - improved commit messages
 - various other small cleanups

Jagannathan Raman (20):
  vfio/container: pass MemoryRegion to DMA operations
  vfio: add region cache
  vfio: split out VFIOKernelPCIDevice
  vfio: add device IO ops vector
  vfio-user: add vfio-user class and container
  vfio-user: connect vfio proxy to remote server
  vfio-user: implement message receive infrastructure
  vfio-user: implement message send infrastructure
  vfio-user: implement VFIO_USER_DEVICE_GET_INFO
  vfio-user: implement VFIO_USER_DEVICE_GET_REGION_INFO
  vfio-user: implement VFIO_USER_REGION_READ/WRITE
  vfio-user: set up PCI in vfio_user_pci_realize()
  vfio-user: implement VFIO_USER_DEVICE_GET/SET_IRQ*
  vfio-user: forward MSI-X PBA BAR accesses to server
  vfio-user: set up container access to the proxy
  vfio-user: implement VFIO_USER_DEVICE_RESET
  vfio-user: implement VFIO_USER_DMA_READ/WRITE
  vfio-user: add 'no-direct-dma' option
  vfio-user: add 'x-msg-timeout' option
  vfio-user: add coalesced posted writes

John Levon (7):
  vfio/container: pass listener_begin/commit callbacks
  vfio/container: support VFIO_DMA_UNMAP_FLAG_ALL
  vfio: add vfio_attach_device_by_iommu_type()
  vfio: add vfio_prepare_device()
  vfio: refactor out vfio_interrupt_setup()
  vfio: refactor out vfio_pci_config_setup()
  vfio-user: implement VFIO_USER_DMA_MAP/UNMAP

Thanos Makatos (1):
  vfio-user: introduce vfio-user protocol specification

 MAINTAINERS                           |   10 +-
 docs/devel/index-internals.rst        |    1 +
 docs/devel/vfio-user.rst              | 1522 ++++++++++++++++++++++
 hw/meson.build                        |    1 +
 hw/vfio-user/common.c                 | 1702 +++++++++++++++++++++++++
 hw/vfio-user/common.h                 |  123 ++
 hw/vfio-user/container.c              |  358 ++++++
 hw/vfio-user/container.h              |   24 +
 hw/vfio-user/meson.build              |   10 +
 hw/vfio-user/pci.c                    |  443 +++++++
 hw/vfio-user/protocol.h               |  243 ++++
 hw/vfio-user/trace-events             |   18 +
 hw/vfio-user/trace.h                  |    1 +
 hw/vfio/ap.c                          |    4 +-
 hw/vfio/ccw.c                         |    9 +-
 hw/vfio/common.c                      |  137 +-
 hw/vfio/container-base.c              |    8 +-
 hw/vfio/container.c                   |   78 +-
 hw/vfio/helpers.c                     |  185 ++-
 hw/vfio/igd.c                         |    8 +-
 hw/vfio/iommufd.c                     |   31 +-
 hw/vfio/pci.c                         |  591 +++++----
 hw/vfio/pci.h                         |   34 +-
 hw/vfio/platform.c                    |    4 +-
 hw/virtio/vhost-vdpa.c                |    2 +-
 include/exec/memory.h                 |    4 +-
 include/hw/vfio/vfio-common.h         |   45 +-
 include/hw/vfio/vfio-container-base.h |   11 +-
 meson.build                           |    1 +
 meson_options.txt                     |    2 +
 scripts/meson-buildoptions.sh         |    4 +
 system/memory.c                       |    7 +-
 32 files changed, 5281 insertions(+), 340 deletions(-)
 create mode 100644 docs/devel/vfio-user.rst
 create mode 100644 hw/vfio-user/common.c
 create mode 100644 hw/vfio-user/common.h
 create mode 100644 hw/vfio-user/container.c
 create mode 100644 hw/vfio-user/container.h
 create mode 100644 hw/vfio-user/meson.build
 create mode 100644 hw/vfio-user/pci.c
 create mode 100644 hw/vfio-user/protocol.h
 create mode 100644 hw/vfio-user/trace-events
 create mode 100644 hw/vfio-user/trace.h