SUSE Hack Week: Test mainline kernel on an older Qualcomm SOC (msm89xx), explore current Qualcomm mainlining kernel effort

Project Description

Qualcomm concentrate on supporting recent SOC, older ones aren't supported (use very old downstream kernel, e.g. 3.10).

Goal for this Hackweek

1. Boot mainline kernel to initramfs

I managed to boot mainline kernel (5.9.0-rc1 at the time) on msm89xx on my phone, but kernel crashes. Find why.

$ fastboot -c "debug ignore_loglevel earlycon" boot boot.img
[74500] Continuous splash enabled, keeping panel alive.
[74500] booting linux @ 0x80000, ramdisk @ 0x2700000 (1236022), tags/device tree @ 0x2500000
[74510] Jumping to kernel via monitor
[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd032]
[    0.000000] Linux version 5.9.0-rc1-00020-gabea2a011c54 (pmos@localhost) (aarch64-alpine-linux-musl-gcc (Alpine 10.2.0) 10.2.0, GNU ld (GNU Binutils) 2.35.1) #3 SMP PREEMPT Tue Oct 6 12:24:55 UTC 2020
[    0.000000] printk: debug: ignoring loglevel setting.
[    0.000000] efi: UEFI not found.
[    0.000000] [Firmware Bug]: Kernel image misaligned at boot, please fix your bootloader!
[    0.000000] cma: Reserved 32 MiB at 0x00000000de000000
[    0.000000] earlycon: msm_serial_dm0 at MMIO 0x00000000f991e000 (options '115200n8')
[    0.000000] printk: bootconsole [msm_serial_dm0] enabled
...
[    0.185155] pinctrl core: initialized pinctrl subsystem
[    0.191761] DMI not present or invalid.
[    0.196193] NET: Registered protocol family 16
[    0.200769] DMA: preallocated 4096 KiB GFP_KERNEL pool for atomic allocations
[    0.204611] DMA: preallocated 4096 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
[    0.211812] DMA: preallocated 4096 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
[    0.218962] audit: initializing netlink subsys (disabled)
[    0.228072] thermal_sys: Registered thermal governor 'step_wise'
[    0.228076] thermal_sys: Registered thermal governor 'power_allocator'
[    0.232293] audit: type=2000 audit(0.144:1): state=initialized audit_enabled=0 res=1
[    0.244954] cpuidle: using governor menu
[    0.253102] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[    0.256526] ASID allocator initialised with 32768 entries
[    0.264698] Serial: AMBA PL011 UART driver
... RESET AND DOWNSTREAM KERNEL continues :(
D -     15524 - pm_driver_init, Delta

2. Explore current Qualcomm mainlining kernel effort

Resources

Results

Looking for hackers with the skills:

kernel embedded arm64 mainlining boot soc qualcomm linux

This project is part of:

Hack Week 20

Activity

almost 2 years ago: pvorel added keyword "soc" to this project.

almost 2 years ago: pvorel added keyword "qualcomm" to this project.

almost 2 years ago: pvorel added keyword "linux" to this project.

over 3 years ago: pvorel added keyword "boot" to this project.

over 3 years ago: pvorel added keyword "mainlining" to this project.

over 3 years ago: pvorel added keyword "arm64" to this project.

over 3 years ago: iivanov liked this project.

over 3 years ago: cfconrad liked this project.

over 3 years ago: pvorel added keyword "kernel" to this project.

over 3 years ago: pvorel added keyword "embedded" to this project.

over 3 years ago: pvorel started this project.

over 3 years ago: pvorel originated this project.

Comments

over 3 years ago by pvorel | Reply

My fix posted into linux-arm-msm ML got accepted https://lore.kernel.org/linux-arm-msm/20210415193913.1836153-1-petr.vorel@gmail.com/ https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git/commit/?h=for-next&id=f890f89d9a80fffbfa7ca791b78927e5b8aba869

Unfortunately there is still issue preventing boot with commit 86588296acbf ("fdt: Properly handle "no-map" field in the memory region"). Reverting it allows booting. I need to have look into this issue.