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[Xen-devel] [PATCH][VTD] pci mmcfg patch for x86-64 - version 2

Fixes made in version 2:

1) Use PML4[257] for ioremap of PCI mmcfg.  As full 16-bit segment support 
would require 44-bits.  Since each slot only has 39-bits, we support 2048 PCI 
segments for now.  This can be easily expanded if deemed necessary in the 

2) Integrated PCI mmcfg access with existing PCI config interface for x86_64.  
Use MMCFG interface if offset is greater than 256.

Signed-off-by: Allen Kay <allen.m.kay@xxxxxxxxx>

Attachment: mmcfg_12082.patch
Description: mmcfg_12082.patch

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