Re: [kvmarm] [RFC PATCH 0/3] KVM: ARM: Get rid of hardcoded VGIC addresses

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On Thu, 2012-10-18 at 09:10 +1100, Paul Mackerras wrote:
> 
> With the XICS, there are two types of irqchip: a source controller and
> a presentation controller.  There is one presentation controller per
> vcpu and typically one source controller per PCI host bridge (a source
> controller can manage multiple sources).  The "buid" above is
> basically an identifier for a source controller.
> 
> So with the above, it would be quite easy to add new types and
> arguments for them. 

The only possible issue is that afiak, the ioctl number depends on the
structure size, no ? If it does, then we should add some padding to the
union to leave room for new types.

Cheers,
Ben.


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