Nanopi R5S NVME boot

[Elkowak]

✨ Feature Request: Native NVMe Boot Compatibility

Is it possible to create a new system image that offers native NVMe booting support, similar to the method used by the FriendlyWrt eFlasher utility?

Context

I attempted to manually enable NVMe booting by:

1. Moving the root file system (rootfs) to the NVMe drive.
2. Editing the boot.scr configuration file to load the system from the NVMe partition.

Current Issue

The system currently appears to crash during the boot sequence.

Unfortunately, I was unable to retrieve any useful kernel logs from the UART connection to diagnose the specific point of failure, making debugging difficult.

Official NVMe boot support implemented in a dedicated image would significantly improve usability and storage performance for users.

[Elkowak]

🔎 Additional Details on Boot Attempt

I specifically attempted to use the following script configuration within my boot.scr:

part uuid nvme ${devnum}:2 uuid
setenv bootargs "coherent_pool=2M console=tty1 console=ttyS0,1500000 earlycon=uart8250,mmio32,0xfe660000 root=PARTUUID=${uuid} rw rootwait mitigations=off pcie_aspm=off"
load nvme ${devnum}:1 ${kernel_addr_r} kernel.img
bootm ${kernel_addr_r}

Initially, this configuration successfully loaded the kernel from the NVMe drive (nvme ${devnum}:1). However, it would then successfully boot into the rootfs located on the eMMC due to a matching UUID.

After I removed the root file system from the eMMC to force the NVMe boot, the kernel still loads, but the system now freezes/crashes later during the boot process (after the kernel image is loaded). This suggests the issue is related to mounting the NVMe root file system or an early NVMe driver incompatibility during the initialization phase.

[sbwml]

理论上是能是实现的（但仅限ext4），不过这样会导致固件升级会出现问题。目前暂不考虑这样做。