The series contains an implement of a vfio-user client in QEMU, along with a few
more preparatory patches.
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 pending.
A previous version of this series can be found at
https://lore.kernel.org/qemu-devel/20250607001056.335310-1-john.le...@nutanix.com/
Changes since last series:
- the vfio-user client is now enabled by default, the configure option has been
removed
- the documentation has been relocated next to vhost-user's
- SocketAddress is now used for the command line parameter
- small bits of code review feedback
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 | 1518 +++++++++++++++++++++++++
docs/system/device-emulation.rst | 1 +
docs/system/devices/vfio-user.rst | 24 +
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 | 134 +++
hw/vfio-user/trace.h | 1 +
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 | 345 ++++++
hw/vfio-user/device.c | 387 +++++++
hw/vfio-user/pci.c | 475 ++++++++
hw/vfio-user/proxy.c | 1311 +++++++++++++++++++++
hw/Kconfig | 1 +
hw/meson.build | 1 +
hw/vfio-user/Kconfig | 5 +
hw/vfio-user/meson.build | 9 +
hw/vfio-user/trace-events | 18 +
23 files changed, 4535 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
--
2.43.0
