Does Jetson AGX Xavier allow bifurcation of PCI lanes?

We are developing a custom carrier board for the Jetson AGX Xavier. We are wondering whether the AGX supports “bifurcating” any of the PCI lanes, so that we could (for example) treat a single x4 lane, as a pair of x2 lanes dedicated to two separate devices (two SSDs, or an SSD and a camera, etc.). Please let us know if the AGX hardware supports this, and what if any madness might be needed on the kernel side. Thanks!

No, it does not support this.
Also, only limited pcie controllers there.