Hello
This is the v8 of the patchset. Thank you very much for the
detailed feedback for v7. We appreciate your time. We believe
we have address all the comments for v7 in the current series.
The broader items we have addressed in this series are as follows:
- Removed the main channel / control channel.
- Enabled 1:1 mapping between irqfd:PCIDevice, moving away from
shared interrupt lines to avoid collision between irqfds
- Defined an object type named “remote-object” that connects the
device with its fd in the remote process. This object limits the
number of remote devices to 1 per process to alleviate security
concerns with multiple devices per process. We are addressing the
authentication mechanism for multiple devices in the
VFIO-over-socket proposal.
To touch upon the brief history of this project, we posted the
Proof Of Concept patches before the BoF session in 2018.
Subsequently, we posted RFC v1 [1], RFC v2 [2], RFC v3 [3],
RFC v4 [4], v5 [5], v6 [6] and v7 [7] of the patch series.
Following people contributed to the design and
implementation of this project:
Stefan Hajnoczi <stefanha@redhat.com>
Konrad Wilk <konrad.wilk@oracle.com>
Kanth Ghatraju <kanth.ghatraju@oracle.com>
John G Johnson <john.g.johnson@oracle.com>
Elena Ufimtseva <elena.ufimtseva@oracle.com>
Jagannathan Raman <jag.raman@oracle.com>
We would like to thank QEMU community for your feedback in the
design and implementation of this project.
For the full concept writeup about QEMU multi-process, please refer to
docs/devel/qemu-multiprocess.rst. Also see docs/qemu-multiprocess.txt for
usage information.
We welcome all your ideas, concerns, and questions for this patchset.
[POC]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg566538.html
[1]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg602285.html
[2]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg624877.html
[3]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg642000.html
[4]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg655118.html
[5]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg682429.html
[6]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg697484.html
[7]: https://patchew.org/QEMU/cover.1593273671.git.elena.ufimtseva@oracle.com/
Elena Ufimtseva (8):
multi-process: add qio channel function to transmit
multi-process: define MPQemuMsg format and transmission functions
multi-process: add co-routines to communicate with remote
multi-process: introduce proxy object
multi-process: Forward PCI config space acceses to the remote process
multi-process: heartbeat messages to remote
multi-process: perform device reset in the remote process
multi-process: add configure and usage information
Jagannathan Raman (11):
memory: alloc RAM from file at offset
multi-process: Add config option for multi-process QEMU
multi-process: setup PCI host bridge for remote device
multi-process: setup a machine object for remote device process
multi-process: Initialize message handler in remote device
multi-process: Associate fd of a PCIDevice with its object
multi-process: setup memory manager for remote device
multi-process: PCI BAR read/write handling for proxy & remote
endpoints
multi-process: Synchronize remote memory
multi-process: create IOHUB object to handle irq
multi-process: Retrieve PCI info from remote process
John G Johnson (1):
multi-process: add the concept description to
docs/devel/qemu-multiprocess
MAINTAINERS | 26 ++
backends/hostmem-memfd.c | 2 +-
configure | 11 +
docs/devel/index.rst | 1 +
docs/devel/multi-process.rst | 966 ++++++++++++++++++++++++++++++++++++++++
docs/multi-process.rst | 67 +++
exec.c | 11 +-
hw/Makefile.objs | 1 +
hw/i386/Makefile.objs | 4 +
hw/i386/remote-memory.c | 58 +++
hw/i386/remote-msg.c | 266 +++++++++++
hw/i386/remote-obj.c | 127 ++++++
hw/i386/remote.c | 79 ++++
hw/misc/ivshmem.c | 3 +-
hw/pci-host/Makefile.objs | 1 +
hw/pci-host/remote.c | 76 ++++
hw/pci/Makefile.objs | 2 +
hw/pci/memory-sync.c | 211 +++++++++
hw/pci/proxy.c | 417 +++++++++++++++++
hw/remote/Makefile.objs | 1 +
hw/remote/iohub.c | 123 +++++
include/exec/memory.h | 2 +
include/exec/ram_addr.h | 2 +-
include/hw/i386/remote-memory.h | 19 +
include/hw/i386/remote-obj.h | 42 ++
include/hw/i386/remote.h | 35 ++
include/hw/pci-host/remote.h | 31 ++
include/hw/pci/memory-sync.h | 27 ++
include/hw/pci/pci_ids.h | 3 +
include/hw/pci/proxy.h | 48 ++
include/hw/remote/iohub.h | 42 ++
include/io/channel.h | 24 +
include/io/mpqemu-link.h | 123 +++++
include/qemu/mmap-alloc.h | 3 +-
io/Makefile.objs | 2 +
io/channel.c | 45 ++
io/mpqemu-link.c | 303 +++++++++++++
scripts/mpqemu-launcher.py | 49 ++
softmmu/memory.c | 3 +-
util/mmap-alloc.c | 7 +-
util/oslib-posix.c | 2 +-
41 files changed, 3252 insertions(+), 13 deletions(-)
create mode 100644 docs/devel/multi-process.rst
create mode 100644 docs/multi-process.rst
create mode 100644 hw/i386/remote-memory.c
create mode 100644 hw/i386/remote-msg.c
create mode 100644 hw/i386/remote-obj.c
create mode 100644 hw/i386/remote.c
create mode 100644 hw/pci-host/remote.c
create mode 100644 hw/pci/memory-sync.c
create mode 100644 hw/pci/proxy.c
create mode 100644 hw/remote/Makefile.objs
create mode 100644 hw/remote/iohub.c
create mode 100644 include/hw/i386/remote-memory.h
create mode 100644 include/hw/i386/remote-obj.h
create mode 100644 include/hw/i386/remote.h
create mode 100644 include/hw/pci-host/remote.h
create mode 100644 include/hw/pci/memory-sync.h
create mode 100644 include/hw/pci/proxy.h
create mode 100644 include/hw/remote/iohub.h
create mode 100644 include/io/mpqemu-link.h
create mode 100644 io/mpqemu-link.c
create mode 100755 scripts/mpqemu-launcher.py
--
1.8.3.1