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GETSECSMCTRL
Retrieves the Secure Management Mode (SMM) control settings from the processor and stores the result in the destination register.
The following table covers what the source and destinations can be:
| source | destination(s) |
|---|---|
| imm | #I |
| reg | #I |
| mN | #I |
| #I | r64 |
DO NOT support LOCK
This instruction SHALL only be executed in Secure Management Mode (SMM). Execution outside of SMM SHALL result in a general protection exception (#GP).
The destination register MUST be a 64-bit general-purpose register to receive the SMCTRL value. Failure to use a 64-bit register in a 64-bit mode context may lead to unexpected behavior or truncation. Since this instruction accesses hardware-specific security controls, it is only available on processors that support the corresponding Secure Management extensions.