Re: [Xen-devel] [PATCH V2 3/4] xen/arm: Add support for Broadcom 7445D0 A15 platform.

[Jonathan Fraser <jfraser@xxxxxxxxxxxx>]

On Fri, 2014-10-03 at 11:44 +0100, Julien Grall wrote:
> Hello Jon,
> 
> On 02/10/2014 23:16, Jon Fraser wrote:
> > This code supports the Broadcom 7445D0 32-bit A15 based platform.
> 
> While this patch has been acked and applied. Did you check that the (by 
> default mapped 0xb0000000-0xb0020000) doesn't overlap to the RAM or 
> another device on your platform?
> 
> Regards,
> 

I had a question about that.  This is a guest physical address, not the
machine physical address?  What are the restrictions?

On our current platforms, memory always starts at 0 and we currently
support between 1 and 6 GB.  There's always a 1GB hole at 0xc0000000.

However in the future, memory will start at 0x40000000 and extend
contiguously past 32-bit space for up to 4GB of memory, then segmented
in 36-bit address space.

I haven't tried a guest with much more than 1GB of memory, but will
try that today.

Thanks,
Jon


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