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Fanfold Paper
Posts: 14
Registered: ‎05-18-2019
Location: US
Views: 303
Message 1 of 2

A485 bios lacks proper IOMMUV2 Support ?

I'm unable to use amdkfd in linux.


During boot it says:

kfd kfd: error required iommu flags ats 0, pri 0, pasid 0

kfd kfd: Error initializing iommuv2

kfd kfd: device 1002:15dd NOT added due to errors


iommuv2 is needed for kfd which is needed for opencl support.

Is the feature not enabled in the bios ?

Will this require an updated bios from lenovo ?


Lenovo Employee DaveOber
Lenovo Employee
Posts: 52
Registered: ‎12-17-2018
Location: US
Views: 215
Message 2 of 2

Re: A485 bios lacks proper IOMMUV2 Support ?

adding iommu=pt to the linux cmdline will allow the iommu to load correctly and should not have any bad side effects when running ang virtualizations

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