https://bugzilla.kernel.org/show_bug.cgi?id=198883

--- Comment #71 from Andrey Grodzovsky (andrey.grodzov...@amd.com) ---
(In reply to Ricardo Ribalda from comment #69)
> This is my kernel configuration:
> 
> 
> ricardo@neopili:~/curro/kernel-upstream$ cat .config | grep -i IOMMU
> CONFIG_GART_IOMMU=y
> # CONFIG_CALGARY_IOMMU is not set
> CONFIG_IOMMU_HELPER=y
> CONFIG_IOMMU_SUPPORT=y
> # Generic IOMMU Pagetable Support
> # CONFIG_AMD_IOMMU is not set
> # CONFIG_INTEL_IOMMU is not set
> # CONFIG_IOMMU_DEBUG is not set
> 
> 
> Tomorrow I will try bootig with iommu=off, but my understanding was that if
> /sys/class/iommu was missing, iommu was disabled.

Agreed.

> 
> Thans!

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