Re: [PATCH] Fix devmem_is_allowed for below 1MB accesses for an efimachine

[H. Peter Anvin]

On 10/02/2012 10:28 PM, Matthew Garrett wrote:
> On Tue, Oct 02, 2012 at 11:13:17PM -0600, Thavatchai Makphaibulchoke wrote:
> 
>> Sounds like a better solution is to allow accesses to only I/O regions 
>> presented in the EFI memory map for physical addresses below 1 MB.
> 
> That won't work - unfortunately we do still need the low region to be 
> available for X because some platforms expect us to use int10 even on 
> EFI (yes, yes, I know). Do you have a copy of the EFI memory map for a 
> system that's broken with the current code?
> 

I honestly think this calls for a quirk, or more likely, no action at
all ("don't do that, then.")

	-hpa


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