[dpdk-dev] [PATCH] igb_uio: fail and log if kernel lock down is enabled

[Ferruh Yigit]

On 5/15/2018 7:52 PM, Stephen Hemminger wrote:
> On Tue, 15 May 2018 17:56:12 +0100
> Ferruh Yigit <ferruh.yigit at intel.com> wrote:
> 
>> When EFI secure boot is enabled, it is possible to lock down kernel and
>> prevent accessing device BARs and this makes igb_uio unusable.
> 
> This distro specific (and not upstream) stuff in igb_uio is getting
> to be a significantly ugly. Can this be detected by seeing if one
> of the calls (such setup bars) failing?

Agreed that it is ugly.
igb_uio already will fail in these systems, we can detect failure but the target
is detect reason of failure and inform user about root cause.
I can't think of any other way than using distro specific stuff for this case.

> 
> The best long term solution would be getting all kernel modules upstream;
> but it looks like that will never happen due to UIO maintainer resistance.
>