[Qemu-devel] [PATCH V2 0/4] hw/pcie: Multi-root support for Q35

[Marcel Apfelbaum <marcel@redhat.com>]

The PXB host bridge provides a way to have multiple PCI hierarchies (PCI root buses).
This series is porting the PXB device to Q35 machines by:
 - removing the internal pci-bridge
 - make the PXB bus PCIe for Q35, while it remains PCI for i440fx.

This approach works because the Root Complexes are exposed to guest as regular
(legacy) opaque PCI host bridges.

Tested on Fedora and Windows guests with both Root Ports and PCIe Switches.

v1 -> v2:
 Addressed Gerd Hoffmann comments:
 - Added x-enable-internal-bridge compat property to keep the PCI
   bridge for older machine to avoid breaking migration.

Thanks,
Marcel

Marcel Apfelbaum (4):
  hw/pxb: remove the built-in pci bridge
  hw/acpi: merge pxb adjacent memory/IO ranges
  hw/pc: query both q35 and i440fx bus
  hw/pxb: add support for PCIe

 hw/i386/acpi-build.c                | 126 +++++++++++++++++++++---------------
 hw/i386/pc.c                        |   2 +-
 hw/pci-bridge/pci_expander_bridge.c |  45 ++++++++++---
 hw/pci-host/q35.c                   |   8 +++
 include/hw/compat.h                 |   4 ++
 include/hw/i386/pc.h                |   9 +++
 6 files changed, 133 insertions(+), 61 deletions(-)

-- 
2.1.0