[Xen-devel] Re: [PATCH] x86: add CMCI software injection interface

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 28/04/2010 11:06, "Ke, Liping" <liping.ke@xxxxxxxxx> wrote:

> Hi, all
>  
> Currently we already have MCE software injection interface.
> This small patch now add CMCI software injection interface. So that CMCI error
> could be triggered by software on CPUs which support CMCI.
> Broadcast option is used for simulating bank sharing scenario.
>  
> This patch was tested together by running mcelog in DOM0 and got expected CMCI
> information.

Applied, but then reverted as I realised it appears to change Xen's MCE ABI
without consideration of backward compatibility. Obviously that is not
acceptable. 

It seems that generally you guys have issues with the existing machine-check
interfaces, and your inability to modify them now they are a fixed part of
the ABI. Do we need to discuss ways to work around this in a way that
doesn't break older guests?

 -- Keir



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