RE: [patch] fix ACPI table discovery from EFI for x86

[Tolentino, Matthew E]

Bjorn Helgaas <> wrote:
> On Wednesday 13 July 2005 7:09 pm, Matt Tolentino wrote:
>> This patch addresses a problem on x86 EFI systems with larger memory
>> configurations.  Up until now, we've relied on the fact that the
>> ACPI RSDT would reside somewhere in low memory that could be
>> permanently 
>> mapped in kernel address space - so __va() has been sufficient. 
>> However, 
>> on EFI systems, the RSDT is often anywhere in the lower 4GB of
>> physical 
>> address space.  So, we may need to remap it on x86 systems.
> 
> The hunk below breaks HP rx7620, rx8620, and Superdome (all ia64)
> systems.  This is from 2.6.13-rc4-mm1, in

Ugh.  Well, that's pretty ugly...

Andrew, Len, please drop this one until I look at this closer.  

>     acpi-fix-table-discovery-from-efi-for-x86.patch

Thanks for testing Bjorn.  

matt 

 
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