From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH 16/27] tools/libxl: Infrastructure for
 reading a libxl migration v2 stream
Date: Wed, 17 Jun 2015 11:55:23 +0100
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To: Wen Congyang <wency@cn.fujitsu.com>
Cc: Wei Liu <wei.liu2@citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Xen-devel <xen-devel@lists.xen.org>, Ross Lagerwall <ross.lagerwall@citrix.com>, Yang Hongyang <yanghy@cn.fujitsu.com>
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On Wed, 2015-06-17 at 18:49 +0800, Wen Congyang wrote:
> On 06/17/2015 06:15 PM, Ian Campbell wrote:
> > On Wed, 2015-06-17 at 11:09 +0800, Wen Congyang wrote:
> >>> +    if (hdr->options & RESTORE_OPT_BIG_ENDIAN) {
> >>> +        ret = ERROR_FAIL;
> >>> +        LOG(ERROR, "Unable to handle big endian streams");
> >>> +        goto err;
> >>
> >> I think it is better to check if the host is big endian or not.
> > 
> > It's not, there are no big endian ports of Xen today. I think encoding
> > that here is fine.
> 
> IIRC, arm supports big endian. Do we only use arm+little endian?

Currently, yes. There are plans afoot to support big endian _guests_ but
not big endian hypervisor (and by extension IMHO tools or at least the
migration stream should remain LE). That would be a lot of faff for very
little benefit IMHO.

Ian.