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Date: Wed, 11 Jun 2014 10:27:57 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v3 1/4] cpus: Define NMI callback
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To: Alexander Graf <agraf@suse.de>, Peter Maydell <peter.maydell@linaro.org>
Cc: Alex Bligh <alex@alex.org.uk>, Alexey Kardashevskiy <aik@ozlabs.ru>, QEMU Developers <qemu-devel@nongnu.org>, Markus Armbruster <armbru@redhat.com>, "qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>, Stefan Hajnoczi <stefanha@redhat.com>, Cornelia Huck <cornelia.huck@de.ibm.com>, Luiz Capitulino <lcapitulino@redhat.com>, =?ISO-8859-1?Q?Andreas_F=E4r?= =?ISO-8859-1?Q?ber?= <afaerber@suse.de>, Richard Henderson <rth@twiddle.net>

Il 11/06/2014 10:01, Alexander Graf ha scritto:
>> Personally, I don't see anything wrong in these patches, apart from
>> the typo that Cornelia pointed out.
>
> If you wanted to inject an NMI on non-sPAPR machines, such as -M mac99
> or -M g3beige you would have to trigger an interrupt with the MPIC, not
> the CPU itself.

But right now inject-nmi was a CPU-specific interface and whoever needs 
something different will have to find a way.

You could argue that Alexey does need something different thanks to his 
need to inject the NMI on all CPUs.

What about an NMIMonitorHandler interface that takes a Monitor*, and 
then you iterate on all of /machine looking for implementors of the 
interface?  Then -M mac99 can add it to the MPIC, -M spapr can just 
ignore the Monitor*, and i386/s390 can look at the current CPU.

Paolo