On 11/5/26 20:51, Nathan Chen via Devel wrote: > An 'ats' OnOffAuto property was introduced for QEMU vfio-pci devices in > QEMU v11.0 [0]. This property controls whether the ATS capability is > exposed in a device's PCIe config space. 'off' always masks the > capability, 'on' fails device realize if the kernel reports it is > unsupported for the device, and the default 'auto' value masks it if > the kernel reports it is unsupported. > > This series exposes the property as an attribute of the hostdev > <driver> element: > > <hostdev mode='subsystem' type='pci' managed='yes'> > <driver name='vfio' ats='off'/> > ... > </hostdev> > > If the attribute is omitted, nothing is passed to QEMU and its 'auto' > default applies. > > The attribute is rejected in network and network port <driver> > definitions, as ATS visibility is a per-VM decision and network <driver> > settings other than name/model do not apply. Users can still set the > attribute for individual VFs through <interface type='hostdev'>. > > [0] > https://github.com/qemu/qemu/commit/bc034e8a959c07471d1214b3525bb68fccce1031 > > Nathan Chen (2): > qemu: capabilities: Introduce QEMU_CAPS_VFIO_PCI_ATS > qemu: Support vfio-pci per-device ATS attribute > > docs/formatdomain.rst | 8 +++ > src/conf/device_conf.c | 8 +++ > src/conf/device_conf.h | 1 + > src/conf/network_conf.c | 6 +++ > src/conf/schemas/basictypes.rng | 5 ++ > src/conf/virnetworkportdef.c | 6 +++ > src/qemu/qemu_capabilities.c | 2 + > src/qemu/qemu_capabilities.h | 1 + > src/qemu/qemu_command.c | 1 + > src/qemu/qemu_validate.c | 7 +++ > .../caps_11.1.0_aarch64.xml | 1 + > .../caps_11.1.0_s390x.xml | 1 + > .../caps_11.1.0_x86_64.xml | 1 + > .../caps_11.2.0_aarch64.xml | 1 + > .../caps_11.2.0_s390x.xml | 1 + > .../caps_11.2.0_x86_64.xml | 1 + > .../hostdev-vfio-ats.x86_64-latest.args | 36 +++++++++++++ > .../hostdev-vfio-ats.x86_64-latest.xml | 52 +++++++++++++++++++ > tests/qemuxmlconfdata/hostdev-vfio-ats.xml | 41 +++++++++++++++ > tests/qemuxmlconftest.c | 1 + > 20 files changed, 181 insertions(+) > create mode 100644 tests/qemuxmlconfdata/hostdev-vfio-ats.x86_64-latest.args > create mode 100644 tests/qemuxmlconfdata/hostdev-vfio-ats.x86_64-latest.xml > create mode 100644 tests/qemuxmlconfdata/hostdev-vfio-ats.xml >
Reviewed-by: Michal Privoznik <[email protected]> and merged. Michal
