Re: [PATCH] Remove warning in efi_enter_virtual_mode

["H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>]

> 
> "UEI" is Celtic for "We missed DOS so we burned it into your ROMS"
> 
> I love it "maith an fear"
> 
>> There are currently only two situations where we need to map EFI Boot
>> Service regions,
>>
>>    1. To workaround the firmware bug described in 916f676f8
>>    2. To access the ACPI BGRT image
>>
>> but since we haven't seen an i386 implementation that requires either,
>> this simple fix should suffice for now. Item 2. above does still work on
>> i386 provided that the BGRT image is not in highmem.
> 
> Matt, Peter, Josh, Darren.
> 
> Given it's not possible to guarantee someone won't stuff a BGRT into
> EFI_BOOT_MEMORY >= highmem eventually (and indeed the axioms of the
> universe pretty much guarantee eventually it will be so) - I'd suggest
> version 2.
> 

Quite frankly, it is quite likely.

> A kernel parameter - rather than a probe for BGRT - since we anticipate
> BIOS bugs on the way.

Pardon?  Kernel parameter for what?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.