[PATCH RFC 00/13] qemu: Add support for iothread to virtqueue mapping for 'virtio-scsi'

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The first part of the series refactors the existing code for reuse and
then uses the new helpers to implement the feature.

Note that this series is in RFC state as the qemu patches are still
being discussed. Thus also the capability bump is not final.

Also note that we should discuss the libvirt interface perhaps as it
turns out that 'virtio-scsi' has two internal queues that need to be
mapped as well.

For now I've solved this administratively by instructing users to also
add mapping for queue '0' and '1' which are the special ones in case of
virtio-scsi.

qemu-patches:
 https://mail.gnu.org/archive/html/qemu-devel/2025-02/msg02810.html


Peter Krempa (13):
  conf: Rename 'virDomainDiskIothreadDef' to
    'virDomainIothreadMappingDef'
  conf: domain: Extract code for parsing and formatting iotrhead mapping
    definition
  hypervisor: domain: Extract code for checking iothread usage
  qemu: command: Rename 'qemuBuildDiskDeviceIothreadMappingProps' to
    'qemuBuildIothreadMappingProps'
  qemu: validate: Extract iothread mapping validation code
  qemuValidateCheckSCSIControllerIOThreads: Return '0' and '-1' instead
    of bools
  conf: schemas: Rename 'diskDriverIothreads' to 'iothreadMapping'
  conf: Validate that iohtreads are used only with 'virtio-scsi'
    controllers
  qemucapabilitiestest: Update 'caps_10.0.0_x86_64' to XXXXXX
  qemu: capabilities: Introduce QEMU_CAPS_VIRTIO_SCSI_IOTHREAD_MAPPING
  conf: Add support for iothread to queue mapping config for
    'virtio-scsi'
  qemu: Implement support for iothread <-> virtqueue mapping for
    'virtio-scsi' controllers
  qemuxmlconftest: Add 'iothreads-virtio-scsi-mapping' case

 docs/formatdomain.rst                         |  33 +++
 src/conf/domain_conf.c                        | 157 +++++++-----
 src/conf/domain_conf.h                        |  11 +-
 src/conf/domain_validate.c                    |  19 ++
 src/conf/schemas/domaincommon.rng             |   7 +-
 src/hypervisor/domain_driver.c                |  34 +--
 src/qemu/qemu_capabilities.c                  |   2 +
 src/qemu/qemu_capabilities.h                  |   1 +
 src/qemu/qemu_command.c                       |  12 +-
 src/qemu/qemu_domain.c                        |   4 +-
 src/qemu/qemu_validate.c                      | 234 ++++++++++--------
 .../caps_10.0.0_x86_64.replies                |  12 +-
 .../caps_10.0.0_x86_64.xml                    |   3 +-
 ...r-virtio-serial-iothread.x86_64-latest.err |   1 +
 .../controller-virtio-serial-iothread.xml     |  27 ++
 ...ads-virtio-scsi-mapping.x86_64-latest.args |  39 +++
 ...eads-virtio-scsi-mapping.x86_64-latest.xml |  54 ++++
 .../iothreads-virtio-scsi-mapping.xml         |  46 ++++
 tests/qemuxmlconftest.c                       |   3 +
 19 files changed, 506 insertions(+), 193 deletions(-)
 create mode 100644 tests/qemuxmlconfdata/controller-virtio-serial-iothread.x86_64-latest.err
 create mode 100644 tests/qemuxmlconfdata/controller-virtio-serial-iothread.xml
 create mode 100644 tests/qemuxmlconfdata/iothreads-virtio-scsi-mapping.x86_64-latest.args
 create mode 100644 tests/qemuxmlconfdata/iothreads-virtio-scsi-mapping.x86_64-latest.xml
 create mode 100644 tests/qemuxmlconfdata/iothreads-virtio-scsi-mapping.xml

-- 
2.48.1




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