Re: [PATCH v5 00/19] vfio-user client

["Cédric Le Goater" <clg@redhat.com>]

On 6/25/25 21:29, John Levon wrote:
> The series contains an implementation of a vfio-user client in QEMU.
> 
> 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.
> A functional test is still being worked on.
> 
> A previous version of this series can be found at
> https://lore.kernel.org/qemu-devel/20250619133154.264786-1-john.levon@nutanix.com/
> 
> Changes since last series:
> 
>   - fixed SPDX identifier nits
>   - code review changes for error handling
> 
> thanks
> john
> 
> John Levon (18):
>    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_MAP/UNMAP
>    vfio-user: implement VFIO_USER_DMA_READ/WRITE
>    vfio-user: add 'x-msg-timeout' option
>    vfio-user: support posted writes
>    vfio-user: add coalesced posted writes
>    docs: add vfio-user documentation
> 
> Thanos Makatos (1):
>    vfio-user: introduce vfio-user protocol specification
> 
>   MAINTAINERS                           |   11 +-
>   docs/interop/index.rst                |    1 +
>   docs/interop/vfio-user.rst            | 1520 +++++++++++++++++++++++++
>   docs/system/device-emulation.rst      |    1 +
>   docs/system/devices/vfio-user.rst     |   26 +
>   meson.build                           |    1 +
>   hw/vfio-user/container.h              |   23 +
>   hw/vfio-user/device.h                 |   24 +
>   hw/vfio-user/protocol.h               |  242 ++++
>   hw/vfio-user/proxy.h                  |  135 +++
>   hw/vfio-user/trace.h                  |    4 +
>   hw/vfio/pci.h                         |    1 +
>   include/hw/vfio/vfio-container-base.h |    1 +
>   include/hw/vfio/vfio-device.h         |    2 +
>   hw/vfio-user/container.c              |  370 ++++++
>   hw/vfio-user/device.c                 |  441 +++++++
>   hw/vfio-user/pci.c                    |  475 ++++++++
>   hw/vfio-user/proxy.c                  | 1356 ++++++++++++++++++++++
>   hw/Kconfig                            |    1 +
>   hw/meson.build                        |    1 +
>   hw/vfio-user/Kconfig                  |    7 +
>   hw/vfio-user/meson.build              |   11 +
>   hw/vfio-user/trace-events             |   20 +
>   23 files changed, 4673 insertions(+), 1 deletion(-)
>   create mode 100644 docs/interop/vfio-user.rst
>   create mode 100644 docs/system/devices/vfio-user.rst
>   create mode 100644 hw/vfio-user/container.h
>   create mode 100644 hw/vfio-user/device.h
>   create mode 100644 hw/vfio-user/protocol.h
>   create mode 100644 hw/vfio-user/proxy.h
>   create mode 100644 hw/vfio-user/trace.h
>   create mode 100644 hw/vfio-user/container.c
>   create mode 100644 hw/vfio-user/device.c
>   create mode 100644 hw/vfio-user/pci.c
>   create mode 100644 hw/vfio-user/proxy.c
>   create mode 100644 hw/vfio-user/Kconfig
>   create mode 100644 hw/vfio-user/meson.build
>   create mode 100644 hw/vfio-user/trace-events
> 


Applied to vfio-next.

Thanks,

C.