PCIE RC Use external reference clock

Our design architecture is as follows, we want to use an external clock chip to provide 100MHz clock frequency to PCIE EP and PCIE RC devices at the same time.Jetson AGX Xavier as RC device（use pcie5）。

my question is：

When xavier is used as a PCIE RC device, does it support using an external clock chip to provide a reference clock? If supported, how to configure it in software? How to connect an external clock chip to the hardware?