Re: [XenARM] [RFC PATCH 2/2] ARM: SMP support for mach-virt

[Nicolas Pitre <nico@xxxxxxxxxxx>]

On Tue, 4 Dec 2012, Will Deacon wrote:

> On Tue, Dec 04, 2012 at 04:45:58PM +0000, Rob Herring wrote:
> > If there is no way to reset the core, then couldn't the hotplug code
> > tear down the cpu setup and just jump back to 0x0 which then returns to
> > the bootloader's pen?
> 
> I think hotplug really should be implemented with a virtio device. We just
> trap back to the emulation and kill the vcpu thread.

Hotplug and secondary boot should really be considered the same and use 
the same methods.  So if you envision a virtio device for hotplug, then 
just use that for secondary boot as well.  PSCI might be simpler to 
implement though.


Nicolas

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