[coreboot] Discussion about dynamic PCI MMIO size on x86
Gerd Hoffmann
kraxel at redhat.com
Mon Jun 6 10:01:13 CEST 2016
Hi,
> I think one can go with 2GB MMIO hole.
Agreeing here. We have PAE. Non-ancient 32bit kernels should support
and use it, for both security reasons (nox support requires PAE page
table format) and accessing physical address space above 4G.
> The PCIe > 4GB is a question, I don't
> think Windows have good support for this.
Depends on the version. Recent windows versions have no problems
handling it. WinXP throws a BSOD though in case it finds a 64bit mmio
window described in \_SB.PCI0._CRS ...
cheers,
Gerd
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