I have pushed this series On Thu, May 15, 2025 at 07:48:07AM -0700, Matthew R. Ochs wrote: > This patch series adds support for configuring the PCI high memory MMIO > window size for aarch64 virt machine types using the highmem-mmio-size > feature introduced in QEMU v10.0.0 [1]. It allows users to configure the > size of the high memory MMIO window above 4GB, which can be required to > support PCI passthrough with devices that have a large BARs. > > The feature is exposed through the existing pcihole64 element associated > with the PCIe root controller: > > <controller type='pci' index='0' model='pcie-root'> > <pcihole64 unit='GiB'>512</pcihole64> > </controller> > > This existing schema supports the same semantics for the QEMU PC > machine pci-hole64-size parameter and is a natural fit for supporting > the highmem-mmio-size feature on the aarch64 virt machine. > > This series is applied over master and depends on the recently merged > patch [2] that added support for QEMU v10.0.0 aarch64 capabilities. > > For your convenience, this series is also available on Github [3]. > > [1] > https://github.com/qemu/qemu/commit/f10104aeae3a17f181d5bb37b7fd7dad7fe86cba > [2] > https://github.com/nvmochs/libvirt/commit/cea2ee1d28780808172911e5c586478d4ee64a39 > > [3] git fetch https://github.com/nvmochs/libvirt.git > pci_highmem_mmio_size_pcihole64 > > Signed-off-by: Matthew R. Ochs <mo...@nvidia.com> > > Changelog: > v3 > - Patch 2 updates: > + Use positive check in qemuBuildGlobalControllerCommandLine > + Only allow pcihole64 for PCIe root controllers with arm virt > - Added review tags from Daniel P. Berrangé for patch 1 and 3 > v2 > - Use existing XML scmhema (pcihole64 element) instead of a new one > > Matthew R. Ochs (3): > qemu: Add capability for PCI high memory MMIO size > qemu: Add command line support for PCI high memory MMIO size > tests: Add pcihole64 test for virt machine > > src/qemu/qemu_capabilities.c | 2 ++ > src/qemu/qemu_capabilities.h | 1 + > src/qemu/qemu_command.c | 14 ++++++++- > src/qemu/qemu_validate.c | 4 ++- > .../caps_10.0.0_aarch64.xml | 1 + > .../pcihole64-virt.aarch64-latest.args | 31 +++++++++++++++++++ > .../pcihole64-virt.aarch64-latest.xml | 29 +++++++++++++++++ > tests/qemuxmlconfdata/pcihole64-virt.xml | 17 ++++++++++ > tests/qemuxmlconftest.c | 1 + > 9 files changed, 98 insertions(+), 2 deletions(-) > create mode 100644 tests/qemuxmlconfdata/pcihole64-virt.aarch64-latest.args > create mode 100644 tests/qemuxmlconfdata/pcihole64-virt.aarch64-latest.xml > create mode 100644 tests/qemuxmlconfdata/pcihole64-virt.xml > > -- > 2.46.0 >
With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
