[PATCH v3 00/12] vfio-user server in QEMU

[Jagannathan Raman]

Based-on: <cover.1629131628.git.elena.ufimtseva@oracle.com>

Hi,

Thank you very much for reviewing the patches in the previous revision!

We have addressed most of comments from v2.

We are working on MSI-x support (used by PCIe devices such as “nvme”)
and a couple of comments in the migration patches. We hope these two
items will be in the next revision of the patches.

Please the list below for changes since last revision:

[PATCH RFC v3 01/12] configure, meson: override C compiler for cmake
  - New patch in this rev

[PATCH RFC v3 02/12] vfio-user: build library
  - fixed indentation issue
  - dropped separate MAINTAINERS section for submodule. using
    existing section to avoid checkpatch warning

[PATCH RFC v3 03/12] vfio-user: define vfio-user-server object
  - Changed socket parameter type to SocketAddress from str
  - renamed object as vfio-user-server
  - renamed devid option as device
  - Added CONFIG_VFIO_USER_SERVER option

[PATCH RFC v3 04/12] vfio-user: instantiate vfio-user context
  - removed errno.h include
  - documented reason for using a machine init done notifier
  - don’t call vfu_destroy_ctx() if context is not initialized

[PATCH RFC v3 05/12] vfio-user: find and init PCI device
  - registering for PCI Express devices as well. Tested with
    “nvme” device in QEMU.
  - MSI-x is not supported yet, PCI-e devices using INTx
    presently. Will add a patch shortly to address MSI-x

[PATCH RFC v3 06/12] vfio-user: run vfio-user context
  - Removed the separate QemuThread for attach as it was blocking
  - Using qemu_set_fd_handler() for attach’ing context

[PATCH RFC v3 07/12] vfio-user: handle PCI config space accesses
  - Using pci_host_config_read_common/write/common() instead of 
pci_default_read/write_config()
  - The read_common/write_common() should take care of endianness

[PATCH RFC v3 09/12] vfio-user: handle PCI BAR accesses
  - Added support for 64-bit BARs

[PATCH RFC v3 11/12] vfio-user: register handlers to facilitate migration
  - Fixed size handling in vfu_mig_buf_read()
  - Moved qemu_remote_savevm() from “precopy” phase to “stop_and_copy”
  - Opening “vfu_mig_file” just before use
  - TODO: Working with Nutanix on issues concerning the “resume”
    phase and size of Migration BAR (the size of migration BAR shouldn’t
    matter when using vfu_migration_callbacks_t).

Please share your comments.

Thank you!

Jagannathan Raman (12):
  configure, meson: override C compiler for cmake
  vfio-user: build library
  vfio-user: define vfio-user-server object
  vfio-user: instantiate vfio-user context
  vfio-user: find and init PCI device
  vfio-user: run vfio-user context
  vfio-user: handle PCI config space accesses
  vfio-user: handle DMA mappings
  vfio-user: handle PCI BAR accesses
  vfio-user: handle device interrupts
  vfio-user: register handlers to facilitate migration
  vfio-user: acceptance test

 configure                                  |  15 +-
 meson.build                                |  39 +
 qapi/qom.json                              |  20 +-
 include/hw/remote/iohub.h                  |   2 +
 migration/savevm.h                         |   2 +
 hw/remote/iohub.c                          |   5 +
 hw/remote/vfio-user-obj.c                  | 868 +++++++++++++++++++++
 migration/savevm.c                         |  73 ++
 .gitlab-ci.d/buildtest.yml                 |   2 +
 .gitmodules                                |   3 +
 MAINTAINERS                                |   3 +
 hw/remote/Kconfig                          |   5 +
 hw/remote/meson.build                      |   3 +
 hw/remote/trace-events                     |  11 +
 subprojects/libvfio-user                   |   1 +
 tests/acceptance/multiprocess.py           |   2 +
 tests/acceptance/vfio-user.py              |  96 +++
 tests/docker/dockerfiles/centos8.docker    |   2 +
 tests/docker/dockerfiles/ubuntu2004.docker |   2 +
 19 files changed, 1151 insertions(+), 3 deletions(-)
 create mode 100644 hw/remote/vfio-user-obj.c
 create mode 160000 subprojects/libvfio-user
 create mode 100644 tests/acceptance/vfio-user.py

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2.20.1