Xavier module PCIe interface control signal is 1.8V or 3.3V?

Control signlas of Xavier module PCIe interface, such as PEX_L0_RST_N, PEX_L0_CLKREQ_N, are 1.8V or 3.3V ?
Jetson AGX Xavier OEM Product Design Guide ,carrier board spec and carrier board schematic ,the description on
these documents is not same. some describe that it is 1.8V, but some describe that it is 3.3V.

They are 3.3v tolerance pin and pull-ups are 3.3v too.