RE: [PATCH 1/3] Add mcelog support for xen platform

From: Liu, Jinsong
Date: Fri Apr 20 2012 - 16:00:53 EST

Konrad Rzeszutek Wilk wrote:
> On Thu, Apr 19, 2012 at 01:29:06PM +0000, Liu, Jinsong wrote:
>>> From af4467b6cf0104ce98cc160438d865256c7d5561 Mon Sep 17 00:00:00
>>> 2001
>> From: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
>> Date: Fri, 20 Apr 2012 05:08:38 +0800
>> Subject: [PATCH 1/3] Add mcelog support for xen platform
>> When MCA error occurs, it would be handled by xen hypervisor first,
>> and then the error information would be sent to dom0 for logging.
> How do I test this?

It can be tested by EINJ tool to inject an memory error, and by mcelog tool to read error info, basically it need:

1. enable einj tools: load EINJ kernel module and mount debugfs;

2. set error type
# cat available_error_type (depend on your bios)
0x00000002      Processor Uncorrectable non-fatal
0x00000008      Memory Correctable
0x00000010      Memory Uncorrectable non-fatal
# echo 0x8 > error_type

3. find a proper physical address for injection (usually use a free page like xen heap page)
4. set the injection address and mask
# echo address > param1
# echo mask > param2
5. inject error
# echo 1 > error_inject
6. use mcelog tool to read error info

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