vfio-pci: VGA and legacy MMIO & I/O port access

This series includes a couple cleanups that I'll target for 3.9 plus RFC patch 3/3 that adds device regions for legacy I/O and makes use of the VGA arbiter for enabling VGA assignment. I know the POWER guys don't likely care about VGA support, but Alexey, Ben, and David, I'd appreciate any feedback on the overal incorporation into vfio given your history with the design. VGA is still a work in progress but with this base I'm able to assign a handlful of desktop cards that I have on hand to a qemu guest using standard builtin VGA drivers. Thanks,

Alex

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Alex Williamson (3):
vfio-pci: Cleanup read/write functions
vfio-pci: Cleanup BAR access
vfio-pci: Add support for legacy MMIO & I/O port towards VGA support

 drivers/vfio/pci/Kconfig            |   10 +
 drivers/vfio/pci/vfio_pci.c         |  106 +++++++++----
 drivers/vfio/pci/vfio_pci_config.c  |    5 -
 drivers/vfio/pci/vfio_pci_private.h |   16 +-
 drivers/vfio/pci/vfio_pci_rdwr.c    |  282 +++++++++++++++++------------------
 include/uapi/linux/vfio.h           |    8 +
 6 files changed, 242 insertions(+), 185 deletions(-)