* Jonathan (Zhixiong) Zhang <zjzh...@codeaurora.org> wrote:
> From: "Jonathan (Zhixiong) Zhang" <zjzh...@codeaurora.org>
>
> With ACPI APEI firmware first handling, generic hardware error
> record is updated by firmware in GHES memory region. On an arm64
> platform, firmware updates GHES memory region with uncached
> access attribute, and then Linux reads stale data from cache.
This paragraph *still* doesn't parse for me. It's not any English
I can recognize: what is a 'With ACPI APEI firmware first handling'?
> With current code, GHES memory region is mapped with PAGE_KERNEL
> based on the assumption that cache coherency of GHES memory region
> is maintained by firmware on all platforms. This assumption is
> not true for above mentioned arm64 platform.
>
> Instead GHES memory region should be mapped with page protection type
> according to what is returned from arch_apei_get_mem_attribute().
... plus what this changelog still doesn't mention is the most important part
of
any bug fix description: how does the user notice this in practice and why does
he
care?
Thanks,
Ingo
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