Re: [PATCH v8] acpi, apei, arm64: APEI initial support for aarch64.

[Fu Wei]

Hi Tomasz,

On 4 April 2016 at 16:32, Tomasz Nowicki <tn@xxxxxxxxxxxx> wrote:
> On 30.03.2016 09:05, Ard Biesheuvel wrote:
>>
>> On 29 March 2016 at 09:44,  <fu.wei@xxxxxxxxxx> wrote:
>>>
>>> From: Tomasz Nowicki <tomasz.nowicki@xxxxxxxxxx>
>>>
>>> This commit provides APEI arch-specific bits for aarch64
>>>
>>> Meanwhile,
>>> (1)add a new subfunction "hest_ia32_init" for
>>> "acpi_disable_cmcff" which is used by IA-32 Architecture
>>> Corrected Machine Check (CMC).
>>> (2)move HEST type (ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) checking to
>>> a generic place.
>>> (3)select EFI when ACPI_APEI is set on ARM64,
>>> because arch_apei_get_mem_attribute is using efi_mem_attributes on ARM64.
>>
>>
>> I think selecting 'EFI' is not the right approach here, especially
>> since EFI is implied by ACPI on that architecture. But selecting a
>> user configurable option like this is typically not recommended. Why
>> doesn't ACPI_APEI depend on ACPI?
>
>
> It does, ACPI_APEI is subsection of the main ACPI menu option, but I don't
> see that ACPI implies EFI in Kconfig.
>
> Also, I agree with Ard, EFI should not be selected conditionally for ARM64
> for ACPI_APEI.
>
> We need EFI only for ARM64 so how about:
> +       select HAVE_ACPI_APEI if (ACPI && EFI)
> in arch/arm64/Kconfig and leave ACPI_APEI as is?

I also agree with Ard, and I like "select HAVE_ACPI_APEI if (ACPI && EFI)"

Thanks for your suggestion !! :-)

>
> Regards,
> Tomasz
>
>



-- 
Best regards,

Fu Wei
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