Intel SGX PRM - about HW reserved region

[idata]

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

[idata]

Hi JaemoonSim,

I recommend you to post these questions on the Intel® Developer Zone forum; here is the link:https://software.intel.com/en-us/forums/intel-software-guard-extensions-intel-sgx https://software.intel.com/en-us/forums/intel-software-guard-extensions-intel-sgx Regards,Hellen.