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 <mochs@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 :|