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Re: [Xen-devel] [PATCH 2/6] xen/hvm kexec: unregister shutdown+sysrq wat

To: Keir Fraser <keir.xen@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 2/6] xen/hvm kexec: unregister shutdown+sysrq watches during reboot
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Thu, 28 Jul 2011 13:52:05 +0100
Cc: Olaf Hering <olaf@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>
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On Thu, 2011-07-28 at 07:00 -0400, Keir Fraser wrote:
> On 28/07/2011 11:52, "Ian Campbell" <Ian.Campbell@xxxxxxxxxx> wrote:
> >>  And what about the event/irq handling? There is currently no way
> >> to check what virq is bound to what port, other than looping through all
> >> possible ports and see if one matches the requested virq.
> > 
> > There is EVTCHNOP_reset but I'm not sure if it does too much. For
> > example I'm not sure how the guest could recover event channels which
> > are setup by the domain builder -- such as the xenstore event channel.
> EVTCHNOP_reset is currently only called from the toolstack, which is then
> able to re-setup things like the xenstore event channel for the guest.

Oh, right. And toolstack isn't involved in kexec so that's not terribly


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