* Jonathan (Zhixiong) Zhang <zjzhang@xxxxxxxxxxxxxx> wrote: > From: "Jonathan (Zhixiong) Zhang" <zjzhang@xxxxxxxxxxxxxx> > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
