Hi Jan,

On 11/03/2015 08:53, Jan Beulich wrote:
On 10.03.15 at 23:45, <dgde...@tycho.nsa.gov> wrote:
In order to do static labeling for device passthrough, the nodes in a
device tree need a 32-bit numeric identifier.  IO memory uses the MFN,
PCI devices use SBDF, and IRQs and x86 legacy IOs just use the number.

A 32-bit number can't uniquely identify an MMIO MFN.

Isn't 32-bit enough to describe an MFN?

Although, MMIO are described with an MFN range.

Regards,

--
Julien Grall

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