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Re: [Xen-devel] [PATCH v4 3/9] xen/arm: Implement set_memory_map hypercall for arm

At 11:09 +0100 on 11 Oct (1381489749), Ian Campbell wrote:
> > Two questions about details of next implementation:
> > 1) Can we restrict memory map number of regions to 1 for ARM? In this 
> > case we don't need list or array to define memory map structure.

Sounds very sensible to me.

> > 2)We have already implemented store& restore of HVM params (magic pages 
> > PFNs) inside ARM toolstack, but I don't know if we need to migrate 
> > contents of such pages. In current ARM toolstack we migrate magic pages 
> > contents too as a part of memory map. In x86 code I cannot find where 
> > the content of magic pages are saved or restored, so may be Xen 
> > developers are familiar about it.
> I have a feeling they are not migrated, and I'm not sure. Perhaps Tim
> knows...

IIRC they are saved as part of general guest memory, but in fact they'll
all be reset on the other side anyway.


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