Re: [dpdk-dev] [PATCH] vhost-user: enable virtio 1.0

[Marcel Apfelbaum <marcel@redhat.com>]

On 11/01/2015 11:53 AM, Thomas Monjalon wrote:
> 2015-11-01 11:00, Marcel Apfelbaum:
>> On 10/30/2015 07:48 PM, Thomas Monjalon wrote:
>>> 2015-10-18 10:04, Michael S. Tsirkin:
>>>> This will require more work then as 1.0 is a different
>>>> endian-ness from 0.9. It's up to you guys to decide
>>>> whether correct BE support is now a requirement for all
>>>> new dpdk code. Let us know.
>>
>>> I'm not sure to understand.
>>> Yes DPDK must work on big endian platforms.
>>> Does this patch prevent from using virtio 0.9 with big endian?
>>
>> No, if it worked until now, will continue to work. (And the other way around)
>>
>> However, if virtio 1.0 is supported by both QEMU and vhost-user,
>> virtio 1.0 has different endianess requirements than prev virtio,
>
> OK so that's an acceptable workaround: big endian platforms must use
> virtio 0.9.
>
> In order to have a big endian support of virtio 1.0, is it sufficient to
> convert data? Is it something we want regarding performance?

I think that converting the data should be enough, however Michael can give
a more knowledgeable answer, we'll have to wait a few days for him as
he is not available this week.


Thanks,
Marcel

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