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 previous version of this series can be found at
https://lore.kernel.org/qemu-devel/20250520150419.2172078-1-john.le...@nutanix.com/
Changes since v2:
- rebase to current master
- code review feedback for region fd change
thanks
john
John Levon (22):
vfio: export PCI helpers needed for vfio-user
vfio: enable per-IRQ MSI-X masking
vfio: add per-region fd support
vfio: mark posted writes in region write callbacks
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 | 10 +-
docs/devel/index-internals.rst | 1 +
docs/devel/vfio-user.rst | 1522 +++++++++++++++++++++++++
docs/system/device-emulation.rst | 1 +
docs/system/devices/vfio-user.rst | 24 +
meson.build | 1 +
hw/vfio-user/container.h | 27 +
hw/vfio-user/device.h | 27 +
hw/vfio-user/protocol.h | 245 ++++
hw/vfio-user/proxy.h | 137 +++
hw/vfio-user/trace.h | 1 +
hw/vfio/pci.h | 13 +
include/hw/vfio/vfio-container-base.h | 1 +
include/hw/vfio/vfio-device.h | 15 +-
include/hw/vfio/vfio-region.h | 1 +
hw/vfio-user/container.c | 348 ++++++
hw/vfio-user/device.c | 389 +++++++
hw/vfio-user/pci.c | 438 +++++++
hw/vfio-user/proxy.c | 1314 +++++++++++++++++++++
hw/vfio/device.c | 58 +-
hw/vfio/pci.c | 99 +-
hw/vfio/region.c | 12 +-
hw/meson.build | 1 +
hw/vfio-user/meson.build | 11 +
hw/vfio-user/trace-events | 18 +
hw/vfio/trace-events | 6 +-
meson_options.txt | 2 +
scripts/meson-buildoptions.sh | 4 +
28 files changed, 4679 insertions(+), 47 deletions(-)
create mode 100644 docs/devel/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/meson.build
create mode 100644 hw/vfio-user/trace-events
--
2.43.0
