1 Reply Latest reply on Aug 31, 2016 4:02 PM by Intel Corporation

    Intel SGX PRM - about HW reserved region

    JaemoonSim

      Hello,

       

      I am working with i5-6600 (6th generation).

      1.

      I've tried to read TAD (Target Address Decoder) using PCI bus. And the value was all 1s.

       

      2.

      I've heard that

      1) SAD/TAD is disabled when SGX is disabled.

      2) When accessing PRM with non-enclave mode processor, read request is aborted and the result turns out to be all 1s.

       

      With facts of 1, 2,

      I am guessing that 'TAD is in PRM & I cannot access it when SGX is disabled'.

       

      Am I guessing right?

       

      i.e., I want to access TAD w/o enabling SGX. Is it possible?

      If possible, is there any document or other kind of hint for it?

       

      Thank you