Re: [Xen-devel] [PATCH][v2] Hybrid extension support in Xen

[Sheng Yang <sheng@xxxxxxxxxxxxxxx>]

On Tuesday 02 February 2010 22:03:31 Keir Fraser wrote:
> On 02/02/2010 13:37, "Sheng Yang" <sheng@xxxxxxxxxxxxxxx> wrote:
> >>> 1. Enable SMP support through VCPU_OP in arch_set_info_guest().
> >>
> >> What does that mean and why would we want it?
> >
> > It's not a good description, sorry... We need a entry address and boot up
> > code AP. For that purpose, I reuse VCPUOP_initialise and VCPUOP_up
> > hypercall. The former guest set the entry address of AP, the later one
> > boot up them. For this, I add some code in arch_set_info_guest() to
> > initialize the AP(mostly what we did after INIT-SIPI-SIPI sequence),
> > that's what I means here...
> 
> Okay, so that leads to the obvious next question: why do you want to avoid
> using INIT-SIPI-SIPI?
> 
Because we don't have IOAPIC/LAPIC...

-- 
regards
Yang, Sheng
 

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