linux-kernel - Re: [Xen-devel] [PATCH 1/3] Add mcelog support for xen platform

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Message-ID: <f6e39d21-e5d9-4558-b3a4-11437b664951@email.android.com>
Date:	Mon, 23 Apr 2012 10:23:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	"Liu, Jinsong" <jinsong.liu@...el.com>,
	"Luck, Tony" <tony.luck@...el.com>, Borislav Petkov <bp@...64.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Xen-devel] [PATCH 1/3] Add mcelog support for xen platform

I know.  It is very frustrating to me that this comes now rather than before Xen was merged, but changing the past is hard.  At least you are trying to fix it.

Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:

>On Mon, Apr 23, 2012 at 09:26:42AM -0700, H. Peter Anvin wrote:
>> On 04/23/2012 08:43 AM, Liu, Jinsong wrote:
>> > 
>> > and, hypervisor only record error into its mc_info cookie (in its
>> > own format), it doesn't care what's dom0's version and how dom0
>translate it
>> > -- that's dom0's business. The role of hypervisor is virtual
>'platform',
>> > just like h/w platform don't care what linux version runs over it.
>> > 
>> 
>> And this is the *OTHER* problem with Xen.  A platform is only a
>platform
>> if it is documented.  There are a number of PV hypervisors which
>*are*
>> documented in detail, but Xen is not one of them.
>
>And slowly we are working on that. As I mentioned to you, we are in
>process
>of documenting those calls so that there is a document similar to an
>SDM.
>It takes time though.

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.
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