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xen-devel
[Xen-devel] Re: [PATCH 1/2] x86, hvm: allow another vcpu to receive PIT
Keir Fraser writes:
> So... You want virtual wire through IO-APIC?
Yes, I'm struggling.
> Still some logic changes to vpt.c will be required, since platform timers
> only tick and generate interrupts when vpt logic is executed on vcpu0's
> return-to-guest path. Same for irq passthrough (handled by your patch 2/2).
Indeed, also vioapic.c doesn't support virtual wire mode.
> Hmmm... Okay I think this might be workable. Device passthru and vpt
> subsystems could be fired off of whichever vcpu owns the LAPIC identifier
> currently programmed into IOAPIC0:PIN0, rather than being hardwired to
> VCPU0.
Okay, but 2/2 patch can wait. First of all, I'll remake 1/2 patch.
Thanks,
Kouya
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