Re: [Xen-devel] [PATCH] x86/hvm: implement save/restore for posted interrupts

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.07.14 at 17:09, <olaf@xxxxxxxxx> wrote:
> Saving and restoring a PVonHVM guest on a host which has the VMX
> "Posted Interrupt Processing" feature enabled will fail because the
> xen-platform-pci device does not receive interrupts anymore after
> restore. The reason is that the IRQs are not maintained in APIC_IRR,
> but in a separate PIR array. This info is lost during the save
> operation.
> 
> Syncing the PIR state into IRR during save, and restoring the state
> later will fix 'xm save/restore' of a PVonHVM guest.
> 
> Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>

Guys, where are we with this? Afaict all simplification suggestions
you provided so far yielded a non-working patch. Are you actively
working on getting a working alternative, or can we get an ack on
what Olaf submitted?

Thanks, Jan


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