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authorAlex Williamson <alex.williamson@redhat.com>2015-09-23 13:04:48 -0600
committerAlex Williamson <alex.williamson@redhat.com>2015-09-23 13:04:48 -0600
commit0e54f24a5b4bb756715928058b60a7d5f70ccd7f (patch)
tree745f7fd0d063c8045adf6a197687b64aef1ef118 /hw/microblaze
parent954258a5f11b51abd1ceed7c96d1204d4cef1353 (diff)
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vfio/pci: Config window quirks
Config windows make use of an address register and a data register. In VGA cards, these are often used to provide real mode code in the BIOS an easy way to access MMIO registers since the window often resides in an I/O port register. When the MMIO register has a mirror of PCI config space, we need to trap those accesses and redirect them to emulated config space. The previous version of this functionality made use of a single MemoryRegion and single match address. This version uses separate MemoryRegions for each of the address and data registers and allows for multiple match addresses. This is useful for Nvidia cards which have two ranges which index into PCI config space. The previous implementation is left for the follow-on patch for a more reviewable diff. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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