Hi, I'm trying to test mainline kernel on Huawei Nexus 6P angler (MSM8994). In the middle of boot (after "Serial: AMBA PL011 UART driver") phone got reset Here is log from UART: [119100] cmdline=console=ttyAMA0 console=ttyAMA1 console=ttyAMA2 console=ttyMSM0 console=ttyMSM1 console=ttyMSM2 keep_bootcon earlycon debug ignore_loglevel PMOS_NO_OUTPUT_REDIRECT => PMOS_NO_OUTPUT_REDIRECT is postmarketOS specific, I tested various console setup ... [119510] boardid:8026 [119520] booting linux @ 0x80000, ramdisk @ 0x2700000 (1314539), tags/device tree @ 0x2500000 [119530] Jumping to kernel via monitor [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd032] [ 0.000000] Linux version 5.12.0-rc2 (pmos@dell5510) (aarch64-alpine-linux-musl-gcc (Alpine 10.2.1_git20210318) 10.2.1 20210318, GNU ld (GNU Binutils) 2.35.2) #1 SMP PREEMPT Thu Mar 25 14:39:46 UTC 2021 [ 0.000000] Machine model: Huawei Nexus 6P [ 0.000000] printk: debug: skip boot console de-registration. [ 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] earlycon: msm_serial_dm0 at MMIO 0x00000000f991e000 (options '115200n8') [ 0.000000] printk: bootconsole [msm_serial_dm0] enabled ... [ 0.244277] cpuidle: using governor menu [ 0.252555] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers. [ 0.255958] ASID allocator initialised with 32768 entries [ 0.264414] Serial: AMBA PL011 UART driver => phone resets, continue first stage bootloader, Little Kernel and downstream kernel (LineageOS) D - 15494 - pm_driver_init, Delta B - 622413 - cpr_init, Start I'm using original Little kernel bootloader, arm64 defconfig and msm8994-angler-rev-101.dtb (obviously). I tried various things: * test various kernel versions current qcom/for-next, various v5.x versions, v4.10 (which brought MSM8994 support) * keep_bootcon earlycon ignore_loglevel debug kernel parameters * use various consoles (e.g. ttyMSM[0-2] and downstream ttyHSL0, ttyAMA0 or no console defined at all) * original AOSP boot.img and boot.img from postmarketOS project (with updated kernel with abootimg * although it should not be caused by missing SELinux (AOSP/postmarketOS require SELinux enabled), I also tested with SELinux enabled (CONFIG_DEFAULT_SECURITY_SELINUX=y, CONFIG_LSM="selinux", ...) It behaves the same on all. I even tried to remove serial config from DTS (serial@f991e000 and alias serial0 = &blsp1_uart2), which lead only to (obviously) disabled UART, but phone still resets. Unplugging UART didn't help either. I looked into /sys/fs/pstore/ (rooted phone), but /sys/fs/pstore/console-ramoops has content of rebooted kernel (LineageOS one), not the mainline. I have no idea what could be wrong. Whether UART dts definition or something else. I suppose the problem is with dts, not with code itself. Any idea what to look for? I can provide more logs, if needed. Kind regards, Petr
