I compiled u-boot version 2023-07 and boot it on a RPi CM4 using a PCIe M.2 NVMe drive, but it doesn't appear to be working.
Once u-boot has started and boot successfully it recognizes the PCIe device giving me the next output
U-Boot> pci BusDevFun VendorId DeviceId Device Class Sub-Class _____________________________________________________________ 00.00.00 0x14e4 0x2711 Bridge device 0x04 01.00.00 0x1c5c 0x174a Mass storage controller 0x08
but when trying to use the nvme scan and nvme info there is not output.
NVMe drive has two partitions 1st is a FAT partition, and 2nd is a EXT4 partition, the RPi firmware recognizes the FAT partition and u-boot boot correctly.
I don't know if this worked before, but I saw in the mailing list that there could be already support for other ARM64 boards.