[Xen-ia64-devel] Re: Exporting native protocol ABI from domain builder

[Alex Williamson <alex.williamson@xxxxxx>]

Hi Ian,

On Tue, 2007-05-15 at 18:26 +0100, Ian Campbell wrote:
> Hi guys,
> 
> I'm not entirely sure this makes any sense for you since I don't think
> either of you have 32on64 PV support but nevertheless here are the ia64
> and powerpc patches that go with xen-unstable.hg 15074:5c7a1e3abd54

   Correct, ia64 doesn't support any 32bit guests and I haven't heard of
anyone thinking of changing that.

> I'm especially unsure about the value for xen-3.0-ia64be, does the
> driver do the byte swapping itself or is a new protocol string required?

   Good question, IIRC I/O is kind of up in the air for big-endian
guests right now.  Dietmar did some patches but got resistance from
upstream.  So for now, not introducing a BE protocol ABI is probably
correct.  Dietmar, do you agree?

> In the absence of any mixed mode support on your platforms it's harmless
> to not apply but if you think it makes sense please go ahead.

   It looks reasonable to me and does give us a little flexibility
should we decide to differentiate based on endian-ness at some point in
the future.  Thanks for thinking of us!

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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