linux-kernel - RE: [PATCH v8] x86: mce: kexec: switch MCE handler for kexec/kdump

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F32A5D25F@ORSMSX114.amr.corp.intel.com>
Date:	Thu, 9 Apr 2015 18:07:58 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Borislav Petkov <bp@...en8.de>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
CC:	Ingo Molnar <mingo@...nel.org>,
	Prarit Bhargava <prarit@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Junichi Nomura <j-nomura@...jp.nec.com>,
	Kiyoshi Ueda <k-ueda@...jp.nec.com>
Subject: RE: [PATCH v8] x86: mce: kexec: switch MCE handler for kexec/kdump

> If only APEI EINJ could be taught to do delayed injection, regardless of
> OS kernel running. Tony, is something like that even possible at all?

Use:

  # echo 1 > notrigger

that allows you to plant a land-mine in memory that will get tripped later.  Pick the memory address in a clever way
and you can have the MCE trigger when some particular function runs.

-Tony