Re: [PATCH v5 4/4] powerpc/pseries/iommu: Allow bigger 64bit window by removing default DMA window

2020-08-04 Thread Alexey Kardashevskiy
On 05/08/2020 13:04, Leonardo Bras wrote: > On LoPAR "DMA Window Manipulation Calls", it's recommended to remove the > default DMA window for the device, before attempting to configure a DDW, > in order to make the maximum resources available for the next DDW to be > created. > > This is a

[PATCH v5 4/4] powerpc/pseries/iommu: Allow bigger 64bit window by removing default DMA window

2020-08-04 Thread Leonardo Bras
On LoPAR "DMA Window Manipulation Calls", it's recommended to remove the default DMA window for the device, before attempting to configure a DDW, in order to make the maximum resources available for the next DDW to be created. This is a requirement for using DDW on devices in which hypervisor