On Fri, 2016-03-11 at 11:19 +0000, Matt Fleming wrote:
> Some machines have EFI regions in page zero (physical address
> 0x00000000) and historically that region has been added to the e820
> map via trim_bios_range(), and ultimately mapped into the kernel page
> tables. It was not mapped via efi_map_regions() as one would expect.
> 
> Alexis reports that with the new separate EFI page tables some boot
> services regions, such as page zero, are not mapped. This triggers an
> oops during the SetVirtualAddressMap() runtime call.


I'm still seeing a failure to boot even with this patch.

http://www.qzxyz.com/IMG_20160313_164601.jpgSorry for the dodgy photo but the screen has almost a mirror finish.

Attached is the dmesg from 4.4 with efi=debug memblock=debug

Cheers,
Scott