[PATCH v2] arm64: enable EDAC on arm64

[Rob Herring]

On Mon, Apr 14, 2014 at 5:21 PM, Rohit Vaswani <rvaswani at codeaurora.org> wrote:
> On 4/10/2014 6:10 AM, Tomasz Nowicki wrote:
>>
>> Rob Herring <robherring2 <at> gmail.com> writes:
>>
>>> From: Rob Herring <rob.herring <at> calxeda.com>
>>>
>>> Implement atomic_scrub and enable EDAC for arm64.
>>>
>>> Signed-off-by: Rob Herring <rob.herring <at> calxeda.com>
>>> Cc: Catalin Marinas <catalin.marinas <at> arm.com>
>>> Cc: Will Deacon <will.deacon <at> arm.com>
>>> ---
>>> v2:
>>> - Add loop for exclusive store success
>>> - Fix size to be 32-bits at a time. The framework gives no alignment
>>>    guarantees.
>>>
>> Hi Rob,
>>
>> I am working on memory error for ARM64 and wondering what is your plans
>> regarding this patch. It looks essential for my further work.
>>
>> Regards,
>> Tomasz
>>
> Hi Tomasz, Rob,
>
> I am looking at similar information for A53 and A57 for the L1/L2 single and
> double bit ecc errors.
> Is there an upstream/linaro effort for EDAC driver in progress ?

I just sent out v3.

There is work to develop a generic RAS framework based on perf which
would hopefully replace EDAC and mcelog(x86 only). Jean Pihet has
picked up this work recently. There probably needs to be some
infrastructure work to handle SError events as I believe that is how
cache ECC errors are reported. Although those may get handled by
firmware and then passed to the OS via some other mechanism like ACPI.

Rob