Re: [Xen-devel] [PATCH v3 20/24] xen/passthrough: Extend XEN_DOMCTL_assign_device to support DT device

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 11/03/2015 12:23, Ian Campbell wrote:
> On Wed, 2015-03-11 at 12:15 +0000, Julien Grall wrote:
> > Hi Jan,
> >
> > On 11/03/2015 08:53, Jan Beulich wrote:
> > > > > > On 10.03.15 at 23:45, <dgdegra@xxxxxxxxxxxxx> 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?
> Up to 32+12== 44 bits, yes, but we know there are ARM systems with 48
> bit PA out there.
Hmmm... checkpolicy and flask will have to be fixed then.

Regards,

--
Julien Grall

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