Re: [PATCH V10 4/5] arm64: apei: implement arch_apei_get_mem_attributes()

[Matt Fleming <matt@codeblueprint.co.uk>]

On Fri, 07 Aug, at 11:16:03AM, Zhang, Jonathan Zhixiong wrote:
> 
> On some (future) arm64 platforms, APEI/GHES region may have full
> coherent access by platform. In such case, the APEI/GHES region have
> the same memory attributes as the rest of system RAM, such region
> do not need to be advised by UEFI as separate entry, but as part of
> system RAM memory region.
> That being said, for arm64 platforms that do not have WB capability
> for APEI/GHES region, such region should be mapped accordingly.

OK, so what I need to know right now is whether I need to drop this
entire series from my pull request or whether you can send a patch on
top of the existing ones in the EFI 'next' branch to address the mapping
heuristic in arch_apei_get_mem_attributes().

> >>Jonathan, can you please provide the EFI memory map region attributes
> >>for the GHES region that requires this series?
> [Reserved           |   |  |  |  |   |  |  |  |UC]

Assuming this memmap entry is indicative of most GHES region on arm64
right now, I think it's worth taking this patch as-is and addressing the
issue Ard raised as a separate patch.

Does that work?

-- 
Matt Fleming, Intel Open Source Technology Center