Pasid granularity resource control for iommu

A method, comprising:

• storing respective resource control descriptors in correspondence with respective identifiers;
• determining resource control information for an input/output (IO) transaction based on a stored resource control descriptor that corresponds to an identifier associated with the IO transaction;
• and
• controlling utilization of one or more resources of an IO memory management unit (IOMMU) based on the determined resource control information.

An apparatus, comprising:

• a core;
• a memory management unit (MMU) communicatively coupled to the core;
• memory communicatively coupled to the MMU to store respective resource control descriptors in correspondence with respective identifiers;
• and
• an input/output (JO) memory management unit (IOMMU) communicatively coupled to the memory, the IOMMU including circuitry to:
• determine resource control information for an IO transaction based on a resource control descriptor stored in the memory that corresponds to an identifier associated with the IO transaction, and
• control utilization of one or more resources of the IOMMU based on the determined resource control information.