Re: [Qemu-devel] [PATCH 2/2 V7] qemu,qmp: add inject-nmi qmp command

[Luiz Capitulino <lcapitulino@redhat.com>]

On Wed, 06 Apr 2011 13:03:37 -0500
Anthony Liguori <anthony@codemonkey.ws> wrote:

> On 04/06/2011 12:47 PM, Luiz Capitulino wrote:
> > On Mon, 04 Apr 2011 08:05:48 -0500
> > Anthony Liguori<anthony@codemonkey.ws>  wrote:
> >
> >> On 04/04/2011 07:54 AM, Avi Kivity wrote:
> >>> On 04/04/2011 01:59 PM, Daniel P. Berrange wrote:
> >>>> Interesting that with HMP you need to specify a single CPU index, but
> >>>> with QMP it is injecting to all CPUs at once. Is there any compelling
> >>>> reason why we'd ever need the ability to only inject to a single CPU
> >>>> from an app developer POV ?
> >>> When a PC has an NMI button, it is (I presume) connected to all CPUs'
> >>> LINT1 pin, which is often configured as an NMI input.  So the all-cpu
> >>> variant corresponds to real hardware, while the single-cpu variant
> >>> doesn't.
> >>>
> >>> wrt the app developer POV, the only use I'm aware of is that you can
> >>> configure Windows to dump core when the NMI button is pressed and thus
> >>> debug driver problems.  It's likely more reliable when sent to all cpus.
> >> It either needs to be removed from HMP or added to QMP.  HMP shouldn't
> >> have more features than QMP (even if those features are non-sensible).
> > Is anyone against changing HMP behavior to send it to all CPUs?
> 
> Makes sense to me.

So, Lai, in order to get this merged could you please do the following:

 1. Address checkpath.pl errors

 2. Change the HMP to use this implementation, which send the NMI
    to all CPUs

 3. Any other review comments I might be missing :)

> 
> Regards,
> 
> Anthony Liguori
>