Hi Pali,
On Sat, Sep 3, 2022 at 6:29 PM Pali Rohár pali@kernel.org wrote:
Do various small fixup/cleanups and extend test script to boot kernel image from UBI volume. This test verifies that U-Boot UBI implementation is working and U-Boot can read volume with bootable kernel code correctly. And therefore CI prevents UBI breakage.
Note that U-Boot UBIFS code on ARM is currently somehow broken and trying to mount UBIFS from UBI volume fails :-( I have already tried to debug this issue but I have no idea why it is failing.
I've recently implemented UBI distro boot on a pair of Kirkwood boards (Pogo V4 and NSA310s) successfully. I created the UBI partition and formatted it in Debian 11.x, Linux kernel 5.19.x. I could let the u-boot distro boot scan the UBI partition to find the boot script boot.scr. And also mount it manually to look at the file system.
An observation: I cannot mount OpenWrt rootfs in u-boot, since it is an UBIFS volume overlay on squashfs. But creating my own UBIFS volume allowed me to mount it in the u-boot command line. I think squashfs is incomplete in u-boot, at the moment.
Best, Tony
Function check_lpt_crc in unpack_ltab is failing. Volume is for sure correct and valid because Linux kernel can successfully mount it. And to make it more suspicious, U-Boot UBIFS is working fine on big endian powerpc platform. So UBIFS issue is probably endian or arch specific. (This is UBIFS related, not UBI related.)
Pali Rohár (9): Nokia RX-51: Remove label copy_kernel_start from lowlevel_init.S Nokia RX-51: Do not clear unknown memory in lowlevel_init.S Nokia RX-51: Set default SYS_LOAD_ADDR to 0x80008000 Nokia RX-51: Change UBIFS volume size to 1870 LEBs in test script Nokia RX-51: Call bootm in test script only when image is valid Nokia RX-51: Fix documentation how to enable UBI support Nokia RX-51: Do not set useless ARCH= in test script Nokia RX-51: Add comment describing kernel image type into test script Nokia RX-51: Add booting from UBI into test script
board/nokia/rx51/lowlevel_init.S | 7 +-- configs/nokia_rx51_defconfig | 2 +- doc/board/nokia/rx51.rst | 3 +- test/nokia_rx51_test.sh | 97 +++++++++++++++++++++++++------- 4 files changed, 82 insertions(+), 27 deletions(-)
-- 2.20.1