[RFC PATCH 0/3] Make 64-bit prefetchable MMIO work

[Guo Chao <yan@linux.vnet.ibm.com>]

Resource assignment code does not work properly after we expose 64-bit
prefetchable MMIO window in PowerNV platform.

  # ROM BAR get 4G-above address.
	This is because default value of PCIBIOS_MAX_MEM_32 is -1
	which makes it useless in 64-bit platform. After
	fixing this ...

  # ROM BAR can't get any address.
	This is because PCIBIOS_MAX_MEM_32 is actually a PCI address
	but functions as a CPU address. After fixing this ...

  # 64-bit prefetchable address is never used.
	This is because root bridge's IORESOURCE_MEM_64 is reset due to
	ROM BARs, which makes it not quilify to get 4G-above prefetchable
	address from host bridge. The 64-bit 4G-above prefetchable window
	is not used at all in the end.

Nothing is really broken currently. This is just a RFC series, preparing
for later PowerNV 64-bit MMIO work.

Guo Chao (3):
  PCI: do not compare CPU address with PCI address
  PCI: set proper default value of PCIBIOS_MAX_MEM_32
  PCI: do not reset bridge's IORESOURCE_MEM_64 flag for ROM BAR

 arch/x86/include/asm/pci.h |  1 -
 drivers/pci/bus.c          | 65 ++++++++++++++++++++++++++++++++++++++++++++--
 drivers/pci/setup-bus.c    |  3 ++-
 include/linux/pci.h        |  2 +-
 4 files changed, 66 insertions(+), 5 deletions(-)

-- 
1.8.3.2