[PATCH v2 0/3] edac: Add L3/SoC support to the APM X-Gene SoC EDAC driver

[Loc Ho]

Hi Dann,

On Tue, Aug 11, 2015 at 7:36 AM, Dann Frazier
<dann.frazier at canonical.com> wrote:
> On Mon, Aug 10, 2015 at 2:15 PM, Loc Ho <lho at apm.com> wrote:
>> Hi Dann,
>>
>>>> v2:
>>>> * Update binding documentation accordingly
>>>> * Change all single bit defines to BIT(x)
>>>> * Add support for L3 version 1 and 2 HW's
>>>> * Change to use debug file system for error injection
>>>> * In L3/SoC instance add function, allocate EDAC context after all
>>>>   initalization successed
>>>> * Support raw or detail info for SoC EDAC error reporting
>>>>
>>>> v1:
>>>> * Add L3/SoC support to the APM X-Gene SoC EDAC driver
>>>
>>> Loc,
>>>   I tested 4.2-rc5 on a Mustang board with one DIMM, and it hangs (RCU
>>> stall) in xgene_edac_mc_irq_ctl() on modprobe. Same board with 2 DIMMs
>>> boots fine. (U-boot 1.15.12).
>>
>> I just removed one of the two 16GB DIMM... with 4.2.0-rc1 and some
>> code clean up in EDAC driver, it boots just fine... I don't believe
>> the code clean up would affect it. Do you have the dump log?
>>
>> [root at dhcp-10-76-213-247 ~]# uname -a
>> Linux dhcp-10-76-213-247 4.2.0-rc1+ #33 SMP PREEMPT Mon Aug 10
>> 13:23:03 MDT 2015 aarch64 GNU/Linux
>
> Sure:
>   http://paste.ubuntu.com/12055821/
> I've reproduced this on two machines. In both cases, we removed the
> DIMM furthest from the CPU (in case that matters).

This is an un-supported configuration. In the latest FW, the FW will
flag this and won't boot. Please remove the DIMM closest to the CPU.
FYI... I will be posting another version soon.

-Loc