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Re: [Xen-devel] xen/arm: Hiding SMMUs from Dom0 when using ACPI on Xen

On 18/05/2017 21:02, Manish Jaggi wrote:
In the IORT table using the  PCI-RC node, SMMU node and ITS node,
RID->StreamID->Device-ID  mapping can be generated.
As per IORT spec toady, same RID can be mapped to different StreamIDs
using two ID Array elements with same RID range but different output
There exists no use case for such a scenario hence a clarification is
required in IORT spec which states that RID range cannot overlap in the
ID array.

I understand that.

with this clarification in place, it is straight-forward to map RID to a
device-ID by replacing output of SMMU to output of RCI-RC

I am not sure to follow your suggestion here. But I will wait a patch before commenting.


Julien Grall

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