[Qemu-devel] [RFC 0/3] pci_expander_brdige: Put pxb host bridge into separate pci domain

[Zihan Yang]

Currently only q35 host bridge is allocated an item in MCFG table, all pxb
host bridges stay within pci domain 0. This series of patches put each pxb
host bridge in separate pci domain, allocating a new MCFG table item for it.

The pxb host does not have an mch in it, as q35 host already has one. All
pxb host bridges just serve as expander bridges in QEMU, which makes them
a little simpler than q35 host bridge.

NOTE: These patches are just initial proof of concept, asking for suggestions.
      The aml part and seabios part are not finished at all. This means it
      still behaves like before, that all pci expander bridges stay in the
      same pci domain as a35 host.

Zihan Yang (3):
  pci_expander_bridge: reserve enough mcfg space for pxb host
  pci: Link pci_host_bridges with QTAILQ
  acpi-build: allocate mcfg for multiple host bridges

 hw/i386/acpi-build.c                        | 83 ++++++++++++++++++-------
 hw/i386/pc.c                                |  5 ++
 hw/pci-bridge/pci_expander_bridge.c         | 96 ++++++++++++++++++++++++++++-
 hw/pci/pci.c                                |  9 +--
 include/hw/pci-bridge/pci_expander_bridge.h |  7 +++
 include/hw/pci/pci_host.h                   |  2 +-
 6 files changed, 175 insertions(+), 27 deletions(-)
 create mode 100644 include/hw/pci-bridge/pci_expander_bridge.h

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2.7.4