Apparatus and method for efficient management of high-bandwidth io links

A method, comprising:

• coupling a plurality of cores to a memory controller via an interconnect fabric, the memory controller to provide access to a system memory;
• coupling an input-output (IO) device to the interconnect fabric;
• mapping a virtual traffic class (TC) value to be used for data traffic with the IO device to a physical TC value in one or more IO page tables;
• transmitting the physical TC value to the IO device in an address translation services (ATS) response to an ATS request generated by the IO device, wherein the IO device is to store the physical TC value;
• and
• verifying a first physical TC value included in a subsequent request from the IO device when the first physical TC value matches the physical TC value stored in the one or more IO page tables.

A machine-readable medium having program code stored thereon which, when executed by a machine, causes the machine to perform operations, comprising:

• coupling a plurality of cores to a memory controller via an interconnect fabric, the memory controller to provide access to a system memory;
• coupling an input-output (IO) device to the interconnect fabric;
• mapping a virtual traffic class (TC) value to be used for data traffic with the IO device to a physical TC value in one or more IO page tables;
• transmitting the physical TC value to the IO device in an address translation services (ATS) response to an ATS request generated by the IO device, wherein the IO device is to store the physical TC value;
• and
• verifying a first physical TC value included in a subsequent request from the IO device when the first physical TC value matches the physical TC value stored in the one or more IO page tables.