Hi all,
To all owners & active users of the SiFive Unmatched board: do you have success running any recent upstream U-Boot on your system?
I use the default U-Boot from Ubuntu 24.04, and it boots GRUB and Linux kernel just fine. Today I flashed the unmodified U-Boot 2024.07 (compiled with "make sifive_unmatched_defconfig" and OpenSBI 1.5), and the Ubuntu kernel (6.8) doesn't boot at all. The last message I see on the console is:
EFI stub: Exiting boot services...
Adding "earlycon=sbi debug" doesn't change anything.
The same behavior is also when GRUB is excluded from the process:
=> nvme scan => load nvme 0:5 $kernel_addr_r /boot/vmlinuz 38603264 bytes read in 47 ms (783.3 MiB/s) => bootefi $kernel_addr_r Booting /\boot\vmlinuz EFI stub: Booting Linux Kernel... EFI stub: EFI_RNG_PROTOCOL unavailable EFI stub: Using DTB from configuration table EFI stub: Exiting boot services...
Is some additional patch needed to run U-Boot on Unmatched?