[PATCH kernel v2 1/4] Revert "powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests"

[Thiago Jung Bauermann]

Hello Alexey,

Alexey Kardashevskiy <aik at ozlabs.ru> writes:

> From: Ram Pai <linuxram at us.ibm.com>
>
> This reverts commit edea902c1c1efb855f77e041f9daf1abe7a9768a.
>
> At the time the change allowed direct DMA ops for secure VMs; however
> since then we switched on using SWIOTLB backed with IOMMU (direct mapping)
> and to make this work, we need dma_iommu_ops which handles all cases
> including TCE mapping I/O pages in the presence of an IOMMU.
>
> Fixes: edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests")
> Signed-off-by: Ram Pai <linuxram at us.ibm.com>
> [aik: added "revert" and "fixes:"]
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>

Reviewed-by: Thiago Jung Bauermann <bauerman at linux.ibm.com>
Tested-by: Thiago Jung Bauermann <bauerman at linux.ibm.com>

-- 
Thiago Jung Bauermann
IBM Linux Technology Center