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Is Trusted Substrate SystemReady IR compliant firmware?

Yes. see trustedsubstrate.org

Trusted Substrate exists in two flavours that build on SystemReady counterparts: TrustedSubstrate-IR and TrustedSubstrate-ES:

  • TrustedSubstrate-IR implementation is built on Trusted Firmware A, OP-TEE, U-Boot and uses Device Tree as hardware description. 

  • TrustedSubstrate-ES implementation is built on EDK2, OP-TEE and uses ACPI as hardware description (main difference with typical datacenter firmware is the presence of OP-TEE). There are discussions to extend U-Boot to offer a full ACPI support in this context.

Is Trusted Substrate SystemReady SBBR compliant firmware?

...