How to ensure that different peripherals getting different IOVA address in kernel?

[chenfeng]

Hi all,

In IOMMU architecture , how to make two different peripherals share the same page table ?

In other words , is there a mechanism or structure to make two peripherals get completely different address.

eg:

peri-Aãperi-B and peri-C share the same iova address 0-1G for some performance requests.

So the A,B,C need to use the same IOVA generator to ensure this,but I don't find an architecture to make this.

Any help will be appreciated.

Puck


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