Re: [PATCH v6 6/8] virtio: add explicit big-endian support to memory accessors

From
David Gibson <hidden>
Date
2015-05-28 05:26:22
Also in
kvm, lkml, virtualization
Reply to
Greg Kurz, 2015-04-24
On Fri, Apr 24, 2015 at 02:26:24PM +0200, Greg Kurz wrote:
The current memory accessors logic is:
- little endian if little_endian
- native endian (i.e. no byteswap) if !little_endian

If we want to fully support cross-endian vhost, we also need to be
able to convert to big endian.

Instead of changing the little_endian argument to some 3-value enum, this
patch changes the logic to:
- little endian if little_endian
- big endian if !little_endian

The native endian case is handled by all users with a trivial helper. This
patch doesn't change any functionality, nor it does add overhead.

Signed-off-by: Greg Kurz <redacted>
Reviewed-by: David Gibson <redacted>

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
Thread (32 messages) 32 messages, 5 authors, last reply 2015-06-01
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