On a Friday in 2025, Peter Krempa wrote:
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
To the above patches Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx> Jano
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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