Secure routing of trusted software transactions in unsecure fabric

Abstract

Various configurations and methods for securing and validating trusted input output (IO) data communications within fabric interconnects of processing circuitry are disclosed herein. As an example, a technique for secure routing of trusted software transactions includes operations of a crypto engine and an IO hub to validate trusted transactions such as DMA read and write transactions received from a trusted IO controller, and configuring the fabrics of the circuitry to prevent re-routing or tampering of data from the trusted transactions. In an example, hardware-based identification and verification of the trusted transactions may be performed with use of content addressable memory at the crypto engine and the respective unsecure fabrics, to identify and enforce the trusted transactions that cannot be re-routed. As a result, rogue agents or entities connected to the unsecure fabrics cannot interfere with or intercept data for trusted transactions.