[libvirt] [PATCH 0/2] RFC: qemu: aarch64 virtio-pci work

[Cole Robinson]

These patches apply on top of the series I just posted:

  [PATCH 0/9] tests: qemu: unconditionally enable QEMU_CAPS_DEVICE
  https://www.redhat.com/archives/libvir-list/2016-January/msg01233.html

These specific changers were discussed here:

https://www.redhat.com/archives/libvir-list/2015-December/msg00217.html

We need a way for apps to tell libvirt 'use virtio-pci not virtio-mmio'
for aarch64 -M virt. We can't really make use this by default yet since
most OS don't actually support it. So we decided the best course of
interaction is to allow users to pass a manual pci controller, and libvirt
will interpret that to mean it's okay to use virtio-pci.

Patch #1 undoes the current behavior of unconditionally adding a q35 style
PCIe controller setup for mach-virt that supports it. In the future we
will probably re-enable something like this, but maybe not for a year or
so until the bits proliferate to distros.

Patch #2 tries to implement the manual pci controller bit. Unfortunately
it's not that easy get the ideal XML to work, so this isn't ready for
committing. See the commit message for more details


Cole Robinson (2):
  qemu: aarch64: Don't add PCIe controller by default
  HACK: qemu: aarch64: Use virtio-pci if user specifies PCI controller

 src/qemu/qemu_command.c                            | 34 ++++++++----
 src/qemu/qemu_domain.c                             |  4 --
 ...l2argv-aarch64-pci-manual-nocontroller-fail.xml | 43 ++++++++++++++++
 .../qemuxml2argv-aarch64-virtio-pci-default.args   |  2 -
 ...l2argv-aarch64-virtio-pci-manual-addresses.args |  2 -
 ...ml2argv-aarch64-virtio-pci-manual-addresses.xml |  1 +
 ...2argv-aarch64-virtio-pci-manual-controller.args | 36 +++++++++++++
 ...l2argv-aarch64-virtio-pci-manual-controller.xml | 50 ++++++++++++++++++
 tests/qemuxml2argvtest.c                           | 22 ++++++--
 .../qemuxml2xmlout-aarch64-virtio-pci-default.xml  | 10 ----
 ...2xmlout-aarch64-virtio-pci-manual-addresses.xml | 11 +---
 ...xmlout-aarch64-virtio-pci-manual-controller.xml | 60 ++++++++++++++++++++++
 tests/qemuxml2xmltest.c                            |  6 +++
 13 files changed, 239 insertions(+), 42 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-pci-manual-nocontroller-fail.xml
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-virtio-pci-manual-controller.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-virtio-pci-manual-controller.xml
 create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-virtio-pci-manual-controller.xml

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2.5.0