Re: [Xen-devel] Question about ARM GIC

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 08/16/2013 10:46 AM, Josh Zhao wrote:
> Hi,

Hi,

> Anyone can help me understand that the Dom0 and DomU will initialize
> GICD in booting stage, but I don't see any code to  remap GICD for
> guest OS. I am wondering how it works?

The GIC doesn't handle the virtualization for the distributor, so it's
emulated by Xen. All accesses to the GICD will trap and redirect to
xen/arch/arm/vgic.c.
You can look at vgic_distr_mmio_{read,write} in the previous file.

Cheers,

-- 
Julien Grall

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