From: Elena Ufimtseva <elena.ufimts...@oracle.com> Hi
This is the v14 of the patchset. Thank you very much for reviewing v13 and sharing your feedback. We have addressed all the comments from the v13 review with changelog below: - [PATCH v14 05/21] multi-process: Add config option for multi-process QEMU add config option to disable the feature (--disable-multiprocess). - [PATCH v14 08/21] multi-process: add qio channel write function - [PATCH v14 09/21] multi-process: add qio channel read function refactor code in qio channel and split in two for read and write. - [PATCH v14 04/21] socket: export socket_get_fd() function export socket_get_fd() and use in remote process with some modifications. In addition, we will be sending a follow-up patch with the acceptance test that can be used to verify that this feature is working correctly. >From the v13 review few items are TODOs: - Prefix log messages with PID in the logging subsystem. - Refactor the MemoryListener code in vfio-user and multi-process code to avoid logic duplication. To touch upon the history of this project, we posted the Proof Of Concept patches before the BoF session in 2018. Subsequently, we have posted 13 versions on the qemu-devel mailing list. You can find them by following the links below ([1] - [13]). Following people contributed to the design and implementation of this project: Jagannathan Raman <jag.ra...@oracle.com> Elena Ufimtseva <elena.ufimts...@oracle.com> John G Johnson <john.g.john...@oracle.com> Stefan Hajnoczi <stefa...@redhat.com> Konrad Wilk <konrad.w...@oracle.com> Kanth Ghatraju <kanth.ghatr...@oracle.com> We would like to thank the QEMU community for your feedback in the design and implementation of this project. Qemu wiki page: https://wiki.qemu.org/Features/MultiProcessQEMU 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. Thank you for reviewing these series. [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.ufimts...@oracle.com/ [8]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg727007.html [9]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg734275.html [10]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg747638.html [11]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg750972.html [12]: https://patchew.org/QEMU/cover.1606853298.git.jag.ra...@oracle.com/ [13]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg766825.html Elena Ufimtseva (8): multi-process: add configure and usage information multi-process: add qio channel write function multi-process: add qio channel read function multi-process: define MPQemuMsg format and transmission functions multi-process: introduce proxy object multi-process: add proxy communication functions multi-process: Forward PCI config space acceses to the remote process multi-process: perform device reset in the remote process Jagannathan Raman (12): memory: alloc RAM from file at offset socket: export socket_get_fd() function 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 docs/devel/index.rst | 1 + docs/devel/multi-process.rst | 966 ++++++++++++++++++++++ docs/multi-process.rst | 64 ++ configure | 10 + meson.build | 3 + hw/remote/trace.h | 1 + include/exec/memory.h | 2 + include/exec/ram_addr.h | 2 +- include/hw/pci-host/remote.h | 31 + include/hw/pci/pci_ids.h | 3 + include/hw/remote/iohub.h | 42 + include/hw/remote/machine.h | 40 + include/hw/remote/memory.h | 19 + include/hw/remote/mpqemu-link.h | 99 +++ include/hw/remote/proxy-memory-listener.h | 28 + include/hw/remote/proxy.h | 52 ++ include/io/channel.h | 50 ++ include/qemu/mmap-alloc.h | 4 +- include/qemu/sockets.h | 1 + include/sysemu/iothread.h | 6 + backends/hostmem-memfd.c | 2 +- hw/misc/ivshmem.c | 3 +- hw/pci-host/remote.c | 75 ++ hw/remote/iohub.c | 119 +++ hw/remote/machine.c | 80 ++ hw/remote/memory.c | 65 ++ hw/remote/message.c | 230 ++++++ hw/remote/mpqemu-link.c | 267 ++++++ hw/remote/proxy-memory-listener.c | 227 +++++ hw/remote/proxy.c | 371 +++++++++ hw/remote/remote-obj.c | 194 +++++ io/channel.c | 88 +- iothread.c | 6 + softmmu/memory.c | 3 +- softmmu/physmem.c | 11 +- stubs/monitor.c | 2 +- tests/test-util-sockets.c | 2 +- util/mmap-alloc.c | 7 +- util/oslib-posix.c | 2 +- util/qemu-sockets.c | 18 +- Kconfig.host | 4 + MAINTAINERS | 24 + hw/Kconfig | 1 + hw/meson.build | 1 + hw/pci-host/Kconfig | 3 + hw/pci-host/meson.build | 1 + hw/remote/Kconfig | 4 + hw/remote/meson.build | 13 + hw/remote/trace-events | 4 + 49 files changed, 3202 insertions(+), 49 deletions(-) create mode 100644 docs/devel/multi-process.rst create mode 100644 docs/multi-process.rst create mode 100644 hw/remote/trace.h create mode 100644 include/hw/pci-host/remote.h create mode 100644 include/hw/remote/iohub.h create mode 100644 include/hw/remote/machine.h create mode 100644 include/hw/remote/memory.h create mode 100644 include/hw/remote/mpqemu-link.h create mode 100644 include/hw/remote/proxy-memory-listener.h create mode 100644 include/hw/remote/proxy.h create mode 100644 hw/pci-host/remote.c create mode 100644 hw/remote/iohub.c create mode 100644 hw/remote/machine.c create mode 100644 hw/remote/memory.c create mode 100644 hw/remote/message.c create mode 100644 hw/remote/mpqemu-link.c create mode 100644 hw/remote/proxy-memory-listener.c create mode 100644 hw/remote/proxy.c create mode 100644 hw/remote/remote-obj.c create mode 100644 hw/remote/Kconfig create mode 100644 hw/remote/meson.build create mode 100644 hw/remote/trace-events -- 2.25.GIT
