Support SVM without PASID

[valmiki <valmikibow@xxxxxxxxx>]

Hi,

In SMMUv3 architecture document i see "PASIDs are optional, 
configurable, and of a size determined by the minimum
of the endpoint".

So if PASID's are optional and not supported by PCIe end point, how SVM 
can be achieved ?

How will the translation for a particular process virtual address is 
obtained ?

Regards,
Valmiki