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Date: Mon, 5 Apr 2021 17:53:47 +0100
From: Liang Ma <liangma@liangbit.com>
To: hamidreza Kheirabadi <hamidreza.kheirabadi@gmail.com>
Cc: dev@dpdk.org
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Subject: Re: [dpdk-dev] vfio error
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On Sun, Apr 04, 2021 at 07:10:43PM +0430, hamidreza Kheirabadi wrote:
> Hi,
> I have a dpdk application which binds nic with igb_uio. My problem is
> whenever the kernel updates, I must recompile igb_uio.ko as well.
> I want to use vfio instead but I got an error:
> 
> Error: bind failed for 0000:06:00.0 - Cannot bind to driver vfio-pci
> Error: unbind failed for 0000:06:00.0 - Cannot open
> /sys/bus/pci/drivers//unbind
> 
> I used ubuntu 20.04 and dpdk-18.05 and use dpdk-setup.py helper script
> 
> Regards,
> hamid
Hi Hamid, 
   Please double check if you enable IOMMU(VT-d) in you bios and if you
   kernel boot parameter has "intel_iommu=on".
Regards
Liang