From mboxrd@z Thu Jan  1 00:00:00 1970
From: gowrishankar muthukrishnan <gowrishankar.m@linux.vnet.ibm.com>
Subject: Re: [PATCH v2] eal: sPAPR IOMMU support in pci probing
 for vfio-pci in ppc64le
Date: Fri, 3 Mar 2017 18:01:43 +0530
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Cc: Chao Zhu <chaozhu@linux.vnet.ibm.com>,
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To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
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Hi Anatoly,


On Friday 03 March 2017 02:38 PM, Burakov, Anatoly wrote:
>
> Please correct me if I'm wrong here, but wouldn't all of these SPAPR-specific defines
> and structures not be available for pre-4.2? So the kernel check should also
> contain all the definitions and structs as well. Maybe it's better to just not compile
> SPAPR support on older kernels, rather than duplicating all the VFIO code.
>
> Any opinions?
>
>
Thanks for this check.

As far as its trace in linux main stream, I see it was merged in 4.2. 
But, it depends on distro when we go back in older kernels.
Some distros may have back-ported it too - eg. linux-3.10.0-514.6.2.el7 
in RHEL 7.2 supports it. So, we might realise whether not supported, 
only in run time (atleast without autoconf sort of stuff in dpdk) IMO. 
any thoughts ?.

Regards,
Gowrishankar