There's a Linux patch that exposes it via prctl: https://lore.kernel.org/all/202...

		fweimer 24 days ago \| parent \| context \| favorite \| on: AMD entered the CPU market with reverse-engineered... There's a Linux patch that exposes it via prctl: https://lore.kernel.org/all/20240410211652.16640-1-zayd_qums... There's also the CFINV instruction (architectural, part of FEAT_FLAGM), which helps with emulating the x86-64 CMP instruction.