From mboxrd@z Thu Jan 1 00:00:00 1970 References: <6caeb963-97fc-c858-8c89-6cafda765d9a@siemens.com> <87wnr25gqw.fsf@xenomai.org> <87v96lbqz0.fsf@xenomai.org> <296ac220-8a0b-a719-d3b6-7bab2b4fc4f4@siemens.com> <87pmwtbqqv.fsf@xenomai.org> From: Philippe Gerum Subject: Re: Dovetail: Possible boot issue on BeagleBone Black In-reply-to: <87pmwtbqqv.fsf@xenomai.org> Date: Thu, 10 Jun 2021 19:02:18 +0200 Message-ID: <87mtrxbqlh.fsf@xenomai.org> MIME-Version: 1.0 Content-Type: text/plain List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Philippe Gerum Cc: Jan Kiszka , xenomai@xenomai.org Philippe Gerum via Xenomai writes: > Jan Kiszka writes: > >> On 10.06.21 18:54, Philippe Gerum wrote: >>> >>> Philippe Gerum writes: >>> >>>> Jan Kiszka writes: >>>> >>>>> Hi Philippe, >>>>> >>>>> seems we have some early boot problem with Dovetail on the BBB (while >>>>> qemu-arm is fine), see [1] vs. [2] (disabled Xenomai for [2], see [3]). >>>>> Do you happen to have such a target around? Or a reference config that >>>>> is supposed to work? >>>>> >>>>> Jan >>>>> >>>>> [1] https://source.denx.de/Xenomai/xenomai-images/-/jobs/277392#L444 >>>>> [2] https://source.denx.de/Xenomai/xenomai-images/-/jobs/277821#L444 >>>>> [3] >>>>> https://source.denx.de/Xenomai/xenomai-images/-/commit/d48c28a82f16b5141948f23cc5bce244217eda15 >>>> >>>> Yes, I have that one at hand, my Kconfig attached. No issue with booting >>>> EVL on the latest Dovetail/5.10-LTS. I'll give a try to Dovetail+Cobalt >>>> later today. (dtb issue in the CI?) >>>> >>>> [ 0.000000] Booting Linux on physical CPU 0x0 >>>> [ 0.000000] Linux version 5.10.42-00590-gcd7b61ff545b (rpm@pyro) (arm-linux-gnueabihf-gcc (Linaro GCC 7.5-2019.12) 7.5.0, GNU ld (Linaro_Binutils-2019.12) 2.28.2.20170706) #1 PREEMPT IRQPIPE Thu Jun 10 09:08:56 CEST 2021 >>>> [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d >>>> [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache >>>> [ 0.000000] OF: fdt: Machine model: TI AM335x BeagleBone Black >>>> [ 0.000000] Memory policy: Data cache writeback >>>> [ 0.000000] efi: UEFI not found. >>>> [ 0.000000] cma: Reserved 64 MiB at 0x9b800000 >>>> [ 0.000000] Zone ranges: >>>> [ 0.000000] DMA [mem 0x0000000080000000-0x000000009fdfffff] >>>> [ 0.000000] Normal empty >>>> [ 0.000000] HighMem empty >>>> [ 0.000000] Movable zone start for each node >>>> [ 0.000000] Early memory node ranges >>>> [ 0.000000] node 0: [mem 0x0000000080000000-0x000000009fdfffff] >>>> [ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x000000009fdfffff] >>>> [ 0.000000] CPU: All CPU(s) started in SVC mode. >>>> [ 0.000000] AM335X ES2.1 (sgx neon) >>>> [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 129540 >>>> [ 0.000000] Kernel command line: root=/dev/nfs rw nfsroot=192.168.3.1:/var/lab/nfsroot/generic/armv7,v3,tcp panic=1 console=ttyS0,115200n8 ip=dhcp >>>> [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear) >>>> [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear) >>>> [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off >>>> [ 0.000000] Memory: 428160K/522240K available (13312K kernel code, 1712K rwdata, 5228K rodata, 2048K init, 411K bss, 28544K reserved, 65536K cma-reserved, 0K highmem) >>>> [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 >>>> [ 0.000000] rcu: Preemptible hierarchical RCU implementation. >>>> [ 0.000000] rcu: RCU event tracing is enabled. >>>> [ 0.000000] Trampoline variant of Tasks RCU enabled. >>>> [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. >>>> [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 >>>> [ 0.000000] IRQ: Found an INTC at 0x(ptrval) (revision 5.0) with 128 interrupts >>>> [ 0.000000] random: get_random_bytes called from start_kernel+0x330/0x4c4 with crng_init=0 >>>> [ 0.004513] IRQ pipeline enabled >>> >>> Using wip/dovetail over dovetail-v5.10.y (.42 so far), bbb boots fine >>> with Dovetail fully enabled, Cobalt in stopped mode. Enabling the core >>> once booted, then running latency crashes in a fairly trivial way. It >>> looks like the paint is still wet there: >>> >>> ~ # corectl --start >>> [ 34.405086] [Xenomai] services started >>> ~ # >>> ~ # >>> ~ # latency >>> == Sampling period: 1000 us >>> == Test mode: periodic user-mode task >>> == All results in micro[ 37.067419] 8<--- cut here --- >>> [ 37.067431] Unable to handle kernel NULL pointer dereference at virtual address 000000c0 >>> [ 37.067435] pgd = 49eec2f1 >>> [ 37.067439] [000000c0] *pgd=83b78831, *pte=00000000, *ppte=00000000 >>> [ 37.067457] Internal error: Oops: 17 [#1] PREEMPT SMP ARM >>> [ 37.067461] Modules linked in: >>> [ 37.067468] CPU: 0 PID: 123 Comm: sampling-120 Not tainted 5.10.42-00113-gbc20d0c23c02-dirty #10 >>> [ 37.067473] Hardware name: Generic AM33XX (Flattened Device Tree) >>> [ 37.067476] IRQ stage: Linux >>> [ 37.067480] PC is at pipeline_set_timer_shot+0x24/0xd8 >>> [ 37.067484] LR is at pipeline_set_timer_shot+0x14/0xd8 >>> [ 37.067488] pc : [] lr : [] psr: 20070093 >>> [ 37.067492] sp : c3abfe58 ip : 10e28280 fp : c3abe000 >>> [ 37.067496] r10: c1a8fab8 r9 : 00000000 r8 : 000f4240 >>> [ 37.067500] r7 : 00000008 r6 : a03fb0a9 r5 : 000edea5 r4 : e147f638 >>> [ 37.067505] r3 : 00000000 r2 : 1e04f000 r1 : c1526704 r0 : 00000000 >>> [ 37.067509] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none >>> [ 37.067513] Control: 10c5387d Table: 83b50019 DAC: 00000051 >>> [ 37.067518] Process sampling-120 (pid: 123, stack limit = 0x86f5afaa) >>> [ 37.067522] Stack: (0xc3abfe58 to 0xc3ac0000) >>> [ 37.067526] fe40: e147f638 df9ab790 >>> [ 37.067531] fe60: a03fb0a9 00000008 000f4240 00000000 c1a8fab8 c040eef0 c3a54100 df9a6840 >>> [ 37.067536] fe80: 000f01f6 00000000 00000000 fffffffd 00000002 3574c753 c3abff04 00000000 >>> [ 37.067541] fea0: 00000000 00000000 00000008 000f4240 00000001 00000001 00000000 c0425e64 >>> [ 37.067546] fec0: 000f4240 00000000 00000001 00000001 e147f600 00000000 c3abff08 e147f638 >>> [ 37.067550] fee0: c3abff28 c04276ec c3abe000 ffffe000 00000003 00000001 00000000 00000051 >>> [ 37.067555] ff00: 00000000 c0427848 00000000 00000000 00000000 02e07ea8 00000000 00000000 >>> [ 37.067560] ff20: 00000000 c042530c 00000000 00000000 000f4240 c3abffb0 00000025 00000000 >>> [ 37.067565] ff40: 02e07ea8 000000f0 00000000 3574c753 c1a8bd40 c3abffb0 00000006 00000000 >>> [ 37.067570] ff60: e147f808 00000000 c3abe000 c3abff78 c0427784 c0423840 00000000 c1baa36b >>> [ 37.067574] ff80: c3abff70 c3a54100 00000078 00000000 00000000 b63d8db8 100f0042 c0300370 >>> [ 37.067579] ffa0: c3abe000 00000007 00000000 c0300264 1000003a 00000003 00000001 b63d8db8 >>> [ 37.067584] ffc0: 00000000 00000000 b63d8db8 000f0042 b63d8e1c 00000001 bea8ba5c 00000000 >>> [ 37.067589] ffe0: 00000001 b63d8d48 00000003 b6ebc488 20070030 1000003a 00000000 00000000 >>> [ 37.067594] [] (pipeline_set_timer_shot) from [] (xntimer_start+0x164/0x260) >>> [ 37.067599] [] (xntimer_start) from [] (__cobalt_timer_setval+0xd4/0x100) >>> [ 37.067604] [] (__cobalt_timer_setval) from [] (__cobalt_timerfd_settime+0xfc/0x194) >>> [ 37.067609] [] (__cobalt_timerfd_settime) from [] (CoBaLt_timerfd_settime+0xc4/0x18c) >>> [ 37.067614] [] (CoBaLt_timerfd_settime) from [] (handle_head_syscall+0x13c/0x30c) >>> [ 37.067619] [] (handle_head_syscall) from [] (fastcall_try+0x10/0x24) >>> [ 37.067623] Exception stack(0xc3abffb0 to 0xc3abfff8) >>> [ 37.067627] ffa0: 1000003a 00000003 00000001 b63d8db8 >>> [ 37.067632] ffc0: 00000000 00000000 b63d8db8 000f0042 b63d8e1c 00000001 bea8ba5c 00000000 >>> [ 37.067636] ffe0: 00000001 b63d8d48 00000003 b6ebc488 20070030 1000003a >>> [ 37.067641] Code: e3053974 e34c3195 ee1d2f90 e7933002 (e59340c0) >>> [ 37.067645] ---[ end trace 09d1faca36a5025f ]--- >>> seconds >>> warming up... >>> >>> NOTE: imx6qp is fine booting with Cobalt enabled. Go figure. >>> >>> NOTE2: we cannot build the bbb kernel with SMP support off. I'll send a >>> patch to fix this. >>> >> >> Note2 is fixed already, you were in CC. !SMP may actually be a key to >> the stuck boot with the xenomai-images config. >> > > Nope, this is another Dovetail-specific issue I'm referring to. No it's not. This stale reference is indeed pulled by Cobalt. All fine now. -- Philippe.