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* ATSAMA5D4 Xplained freeze with Xenomai kernel
@ 2021-03-01 14:39 Vladimir Petrigo
  0 siblings, 0 replies; 9+ messages in thread
From: Vladimir Petrigo @ 2021-03-01 14:39 UTC (permalink / raw)
  To: xenomai




^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-03  9:48         ` Philippe Gerum
@ 2021-03-04  0:54           ` Vladimir Petrigo
  0 siblings, 0 replies; 9+ messages in thread
From: Vladimir Petrigo @ 2021-03-04  0:54 UTC (permalink / raw)
  To: Philippe Gerum; +Cc: Greg Gallagher, xenomai

On Wed, Mar 03, 2021 at 10:48:42AM +0100, Philippe Gerum wrote:
> 
> Vladimir Petrigo <vladimir.petrigo@gmail.com> writes:
> 
> > On Tue, Mar 02, 2021 at 10:37:42AM +0100, Philippe Gerum wrote:
> >> 
> >> Vladimir Petrigo via Xenomai <xenomai@xenomai.org> writes:
> >> 
> >> > On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
> >> >> On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
> >> >> xenomai@xenomai.org> wrote:
> >> >> 
> >> >> >
> >> >> > Hello,
> >> >> >
> >> >> > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
> >> >> > ATSAMA5D4 Xplained board.
> >> >> >
> >> >> > Preliminary:
> >> >> > - non-patched Linux kernel 4.19.144 works just fine
> >> >> > - I-pipe patched kernel can successfully boot
> >> >> > - when I insert an ethernet cable into the on-board ethernet port, the
> >> >> >   kernel freezes and the reset is the only solution to get out of that
> >> >> >   state. Without the ethernet cable inserted the kernel will work
> >> >> >   indefinitely long trying to reach the network and obtain an IP address.
> >> >> >   So I assume something may be wrong with Micrel KSZ8081 driver under
> >> >> >   Xenomai
> >> >> >
> >> >> > Here is the boot log:
> >> >> >
> >> >> > [    0.000000 ] Booting Linux on physical CPU 0x0
> >> >> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> >> >> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> >> >> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
> >> >> > Feb 28 07:27:15 MSK 2021
> >> >> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> >> >> > cr=10c53c7d
> >> >> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> >> >> > instruction cache
> >> >> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> >> >> > [    0.000000 ] Memory policy: Data cache writeback
> >> >> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> >> >> > [    0.000000 ] random: get_random_bytes called from
> >> >> > start_kernel+0x94/0x488 with crng_init=0
> >> >> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> >> >> > 130048
> >> >> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> >> >> > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
> >> >> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> >> >> > bytes)
> >> >> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> >> >> > bytes)
> >> >> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
> >> >> > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> >> >> > cma-reserved)
> >> >> > [    0.000000 ] Virtual kernel memory layout:
> >> >> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> >> >> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> >> >> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> >> >> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> >> >> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> >> >> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> >> >> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> >> >> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
> >> >> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> >> >> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> >> >> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> >> >> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> >> >> > latencies.
> >> >> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> >> >> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> >> >> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> >> >> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> >> >> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> >> >> > 0xffffffff, max_idle_ns: 152900835740 ns
> >> >> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
> >> >> > every 171798691800ns
> >> >> > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> >> >> > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> >> >> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> >> >> > [    0.000627 ] Interrupt pipeline (release #10)
> >> >> > [    0.002773 ] console [rawcon-1] enabled
> >> >> > [    0.003252 ] Console: colour dummy device 80x30
> >> >> > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> >> >> > Inc., Ingo Molnar
> >> >> > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> >> >> > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
> >> >> > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
> >> >> > [    0.003599 ] ... CLASSHASH_SIZE:          4096
> >> >> > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
> >> >> > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
> >> >> > [    0.003762 ] ... CHAINHASH_SIZE:          32768
> >> >> > [    0.003818 ]  memory used by lock dependency info: 4911 kB
> >> >> > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
> >> >> > [    0.003928 ] ------------------------
> >> >> > [    0.003981 ] | Locking API testsuite:
> >> >> > [    0.004036 ]
> >> >> > ----------------------------------------------------------------------------
> >> >> > [    0.004092 ]                                  | spin |wlock |rlock
> >> >> > |mutex | wsem | rsem |
> >> >> > [    0.004146 ]
> >> >> >  --------------------------------------------------------------------------
> >> >> > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.247217 ]
> >> >> >  --------------------------------------------------------------------------
> >> >> > [    0.247280 ]               recursive read-lock:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.254871 ]            recursive read-lock #2:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.262417 ]             mixed read-write-lock:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.269870 ]             mixed write-read-lock:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> >> >> >          |  ok  |
> >> >> > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> >> >> >          |  ok  |
> >> >> > [    0.300789 ]
> >> >> >  --------------------------------------------------------------------------
> >> >> > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> >> > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> >> > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> >> > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> >> > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> >> >> > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> >> >> > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> >> > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> >> > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> >> > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> >> > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> >> > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> >> > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> >> > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> >> > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> >> > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> >> > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> >> > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> >> > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> >> > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> >> > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> >> > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> >> > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> >> > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> >> > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> >> > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> >> > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> >> > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> >> > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> >> > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> >> > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> >> > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> >> > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> >> > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> >> > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> >> > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> >> > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> >> > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> >> > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> >> > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> >> > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> >> > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> >> > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> >> > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> >> > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> >> > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> >> > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
> >> >> > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
> >> >> > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
> >> >> > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
> >> >> > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
> >> >> > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
> >> >> > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
> >> >> > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
> >> >> > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
> >> >> > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
> >> >> > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
> >> >> > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
> >> >> > [    0.874467 ]
> >> >> >  --------------------------------------------------------------------------
> >> >> > [    0.874526 ]   | Wound/wait tests |
> >> >> > [    0.874581 ]   ---------------------
> >> >> > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
> >> >> > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
> >> >> > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
> >> >> > ok  |
> >> >> > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
> >> >> > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
> >> >> > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> >> >> > [    0.959308 ]            spinlock nest unlocked:  ok  |
> >> >> > [    0.963226 ]   -----------------------------------------------------
> >> >> > [    0.963284 ]                                  |block | try  |context|
> >> >> > [    0.963340 ]   -----------------------------------------------------
> >> >> > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
> >> >> > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
> >> >> > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
> >> >> > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
> >> >> > [    1.009546 ] -------------------------------------------------------
> >> >> > [    1.009607 ] Good, all 261 testcases passed! |
> >> >> > [    1.009661 ] ---------------------------------
> >> >> > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> >> >> > [    1.060146 ] pid_max: default: 32768 minimum: 301
> >> >> > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> >> >> > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> >> >> > bytes)
> >> >> > [    1.067206 ] CPU: Testing write buffer coherency: ok
> >> >> > [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
> >> >> > [    1.082477 ] devtmpfs: initialized
> >> >> > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
> >> >> > variant 5 rev 1
> >> >> > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> >> >> > 0xffffffff, max_idle_ns: 19112604462750000 ns
> >> >> > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> >> >> > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
> >> >> > [    1.206526 ] NET: Registered protocol family 16
> >> >> > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
> >> >> > allocations
> >> >> > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
> >> >> > [    1.333809 ] No ATAGs?
> >> >> > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> >> >> > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> >> >> > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> >> >> > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
> >> >> > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> >> >> > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> >> >> > pinctrl driver
> >> >> > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> >> >> > 0x(ptrval)
> >> >> > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> >> >> > 0x(ptrval)
> >> >> > [    1.721621 ] AT91: Detected SoC family: sama5d4
> >> >> > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
> >> >> > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
> >> >> > [    1.732481 ] SCSI subsystem initialized
> >> >> > [    1.735296 ] usbcore: registered new interface driver usbfs
> >> >> > [    1.736049 ] usbcore: registered new interface driver hub
> >> >> > [    1.736561 ] usbcore: registered new device driver usb
> >> >> > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> >> >> > (rx) for DMA transfers
> >> >> > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> >> >> > 0x502).
> >> >> > [    1.746533 ] videodev: Linux video capture interface: v2.00
> >> >> > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
> >> >> > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
> >> >> > Rodolfo Giometti <giometti@linux.it>
> >> >> > [    1.747288 ] PTP clock support registered
> >> >> > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
> >> >> > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
> >> >> > [    2.574436 ] NET: Registered protocol family 2
> >> >> > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
> >> >> > 1, 12288 bytes)
> >> >> > [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
> >> >> > bytes)
> >> >> > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> >> >> > [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
> >> >> > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> >> >> > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> >> >> > [    2.583098 ] NET: Registered protocol family 1
> >> >> > [    2.591094 ] RPC: Registered named UNIX socket transport module.
> >> >> > [    2.591298 ] RPC: Registered udp transport module.
> >> >> > [    2.591371 ] RPC: Registered tcp transport module.
> >> >> > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> >> >> > [    2.602326 ] [Xenomai] scheduling class idle registered.
> >> >> > [    2.602406 ] [Xenomai] scheduling class rt registered.
> >> >> > [    2.603891 ] I-pipe: head domain Xenomai registered.
> >> >> > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
> >> >> > [    2.638984 ] Initialise system trusted keyrings
> >> >> > [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> >> >> > [    2.687431 ] Key type asymmetric registered
> >> >> > [    2.687813 ] Asymmetric key parser 'x509' registered
> >> >> > [    2.688226 ] io scheduler noop registered (default)
> >> >> > [    2.688308 ] io scheduler mq-deadline registered
> >> >> > [    2.688376 ] io scheduler kyber registered
> >> >> > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> >> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> >> > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> >> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> >> > [    3.756264 ] random: fast init done
> >> >> > [    4.064725 ] console [ttyS0] enabled
> >> >> > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> >> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> >> > [    4.143473 ] brd: module loaded
> >> >> > [    4.256253 ] loop: module loaded
> >> >> > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> >> >> > (rx) for DMA transfers
> >> >> > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> >> >> > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> >> >> > at 0xf8010000 (irq 24)
> >> >> > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> >> >> > (rx) for DMA transfers
> >> >> > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> >> >> > at 0xfc018000 (irq 31)
> >> >> > [    4.356675 ] libphy: Fixed MDIO Bus: probed
> >> >> > [    4.369182 ] libphy: MACB_mii_bus: probed
> >> >> > [    4.399395 ] ------------[ cut here  ]------------
> >> >> > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
> >> >> > irq_set_chip+0xbc/0xcc
> >> >> > [    4.411649 ] irqchip GPIO is not pipeline-safe!
> >> >> > [    4.411660 ] Modules linked in:
> >> >> > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
> >> >> > [    4.424953 ] Hardware name: Atmel SAMA5
> >> >> > [    4.428667 ] I-pipe domain: Linux
> >> >> > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
> >> >> > (show_stack+0x10/0x14)
> >> >> > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
> >> >> > (__warn+0xf4/0x10c)
> >> >> > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
> >> >> > (warn_slowpath_fmt+0x48/0x6c)
> >> >> > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
> >> >> > (irq_set_chip+0xbc/0xcc)
> >> >> > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
> >> >> > (irq_set_chip_and_handler_name+0x14/0x2c)
> >> >> > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
> >> >> > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
> >> >> > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
> >> >> > (irq_domain_associate+0x74/0x1ec)
> >> >> > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
> >> >> > (irq_create_mapping+0x64/0xc8)
> >> >> > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
> >> >> > (irq_create_fwspec_mapping+0x184/0x2c4)
> >> >> > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
> >> >> > (irq_create_of_mapping+0x5c/0x78)
> >> >> > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
> >> >> > (of_irq_get+0x6c/0xb8)
> >> >> > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
> >> >> > (of_mdiobus_register_phy+0x84/0x17c)
> >> >> > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
> >> >> > (of_mdiobus_register+0xf4/0x304)
> >> >> > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
> >> >> > (macb_probe+0x72c/0xad0)
> >> >> > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
> >> >> > (platform_drv_probe+0x48/0x98)
> >> >> > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
> >> >> > (really_probe+0x1d8/0x2c0)
> >> >> > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
> >> >> > (driver_probe_device+0x60/0x160)
> >> >> > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
> >> >> > (__driver_attach+0xe8/0xec)
> >> >> > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
> >> >> > (bus_for_each_dev+0x74/0xb4)
> >> >> > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
> >> >> > (bus_add_driver+0x18c/0x210)
> >> >> > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
> >> >> > (driver_register+0x7c/0x114)
> >> >> > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
> >> >> > (do_one_initcall+0x88/0x22c)
> >> >> > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
> >> >> > (kernel_init_freeable+0x26c/0x304)
> >> >> > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
> >> >> > (kernel_init+0x8/0x108)
> >> >> > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
> >> >> > (ret_from_fork+0x18/0x24)
> >> >> > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
> >> >> > [    4.644852 ] dfa0:                                     00000000
> >> >> > 00000000 00000000 00000000
> >> >> > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
> >> >> > 00000000 00000000 00000000
> >> >> > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
> >> >> > [    4.667652 ] irq event stamp: 145160
> >> >> > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
> >> >> > _raw_spin_unlock_irqrestore+0x30/0x58
> >> >> > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
> >> >> > _raw_spin_lock_irqsave+0x1c/0x98
> >> >> > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
> >> >> > __do_softirq+0x2a4/0x420
> >> >> > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
> >> >> > irq_exit+0x1a4/0x1a8
> >> >> > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
> >> >> > [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> >> >> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> >> >> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> >> >> > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> >> >> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> >> >> > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> >> >> > [    4.852778 ] ehci-atmel: EHCI Atmel driver
> >> >> > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
> >> >> > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> >> >> > bus number 1
> >> >> > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> >> >> > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> >> >> > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
> >> >> > idProduct=0002, bcdDevice= 4.19
> >> >> > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> >> >> > SerialNumber=1
> >> >> > [    4.935857 ] usb usb1: Product: EHCI Host Controller
> >> >> > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> >> >> > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
> >> >> > [    4.960887 ] hub 1-0:1.0: USB hub found
> >> >> > [    4.967182 ] hub 1-0:1.0: 3 ports detected
> >> >> > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> >> >> > [    4.988376 ] ohci-atmel: OHCI Atmel driver
> >> >> > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
> >> >> > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
> >> >> > bus number 2
> >> >> > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> >> >> > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
> >> >> > idProduct=0001, bcdDevice= 4.19
> >> >> > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> >> >> > SerialNumber=1
> >> >> > [    5.106711 ] usb usb2: Product: USB Host Controller
> >> >> > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> >> >> > [    5.117146 ] usb usb2: SerialNumber: at91
> >> >> > [    5.127252 ] hub 2-0:1.0: USB hub found
> >> >> > [    5.133470 ] hub 2-0:1.0: 3 ports detected
> >> >> > [    5.150121 ] usbcore: registered new interface driver cdc_acm
> >> >> > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
> >> >> > and ISDN adapters
> >> >> > [    5.164776 ] usbcore: registered new interface driver usb-storage
> >> >> > [    5.171788 ] usbcore: registered new interface driver usbserial_generic
> >> >> > [    5.179229 ] usbserial: USB Serial support registered for generic
> >> >> > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
> >> >> > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
> >> >> > Serial Device
> >> >> > [    5.199977 ] usbcore: registered new interface driver pl2303
> >> >> > [    5.205993 ] usbserial: USB Serial support registered for pl2303
> >> >> > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> >> >> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> >> >> > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> >> >> > 0x00400000-0x004fffff] mapped at (ptrval)
> >> >> > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
> >> >> > [    5.270268 ] g_serial gadget: g_serial ready
> >> >> > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
> >> >> > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> >> >> > [    5.298694 ] i2c /dev entries driver
> >> >> > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
> >> >> > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> >> >> > sec, nowayout = 0)
> >> >> > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
> >> >> > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
> >> >> > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
> >> >> > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> >> >> > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> >> >> > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> >> >> > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> >> >> > irq 28, 1 slots
> >> >> > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
> >> >> > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
> >> >> > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> >> >> > dma1chan1 for DMA transfers
> >> >> > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
> >> >> > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> >> >> > [    5.516378 ] atmel_sha fc050000.sha: Atmel
> >> >> > SHA1/SHA256/SHA224/SHA384/SHA512
> >> >> > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
> >> >> > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> >> >> > DMA transfers
> >> >> > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> >> >> > [    5.566514 ] usbcore: registered new interface driver usbhid
> >> >> > [    5.572227 ] usbhid: USB HID core driver
> >> >> > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> >> >> > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
> >> >> > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> >> >> > OOB size: 224
> >> >> > [    5.622318 ] Bad block table not found for chip 0
> >> >> > [    5.629946 ] Bad block table not found for chip 0
> >> >> > [    5.634709 ] Scanning device for bad blocks
> >> >> > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
> >> >> > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
> >> >> > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
> >> >> > atmel_nand
> >> >> > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
> >> >> > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> >> >> > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
> >> >> > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> >> >> > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
> >> >> > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
> >> >> > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
> >> >> > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
> >> >> > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
> >> >> > [    6.396804 ] NET: Registered protocol family 10
> >> >> > [    6.418370 ] Segment Routing with IPv6
> >> >> > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> >> >> > [    6.434188 ] NET: Registered protocol family 17
> >> >> > [    6.452130 ] Loading compiled-in X.509 certificates
> >> >> > [    6.565366 ] input: gpio_keys as
> >> >> > /devices/platform/gpio_keys/input/input0
> >> >> > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
> >> >> > 07:59:53 UTC (1325491193)
> >> >> > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> >> >> > [   16.620548 ] Waiting up to 110 more seconds for network.
> >> >> >
> >> >> > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
> >> >> > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
> >> >> > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
> >> >> > same family.
> >> >> >
> >> >> > Any suggestions on how to narrow the root case of that freeze will be
> >> >> > greatly appreciated.
> >> >> >
> >> >> > Best regards,
> >> >> > Vladimir Petrigo
> >> >> >
> >> >> > The back trace in the log means that this chip hasn't been fully ported to
> >> >> the ipipe kernel and is missing the flag to identify the gpiochip as
> >> >> pipeline safe.   It is possible the ipipe kernel hasn't been ported
> >> >> properly to this target.  Check the gpio driver and irq chip driver and the
> >> >> timer driver to see if they have any ipipe related code.  It's possible
> >> >> this target was supported by older ipipe versions but wasn't fully ported
> >> >> to a recent version of the ipipe.  I'll check tonight when I get a chance
> >> >> to confirm if this target has support.
> >> >> 
> >> >> -Greg
> >> > Gregg,
> >> >
> >> > Thank you for your response. I was able to get rid of irqchip GPIO pipeline
> >> > safety and the kernel boot log looks like that:
> >> >
> >> > Starting kernel ...
> >> >
> >> > [    0.000000 ] Booting Linux on physical CPU 0x0
> >> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> >> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> >> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
> >> > Mar 1 23:27:31 MSK 2021
> >> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> >> > cr=10c53c7d
> >> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> >> > instruction cache
> >> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> >> > [    0.000000 ] Memory policy: Data cache writeback
> >> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> >> > [    0.000000 ] random: get_random_bytes called from
> >> > start_kernel+0x94/0x488 with crng_init=0
> >> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> >> > 130048
> >> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> >> > ip=dhcp
> >> > nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
> >> > rw
> >> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> >> > bytes)
> >> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> >> > bytes)
> >> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
> >> > rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> >> > cma-reserved)
> >> > [    0.000000 ] Virtual kernel memory layout:
> >> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> >> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> >> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> >> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> >> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> >> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> >> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> >> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
> >> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> >> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> >> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> >> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> >> > latencies.
> >> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> >> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> >> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> >> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> >> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> >> > 0xffffffff, max_idle_ns: 152900835740 ns
> >> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
> >> > 171798691800ns
> >> > [    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> >> > [    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> >> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> >> > [    0.000628 ] Interrupt pipeline (release #10)
> >> > [    0.002823 ] console [rawcon-1] enabled
> >> > [    0.003301 ] Console: colour dummy device 80x30
> >> > [    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> >> > Inc., Ingo Molnar
> >> > [    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> >> > [    0.003542 ] ... MAX_LOCK_DEPTH:          48
> >> > [    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
> >> > [    0.003655 ] ... CLASSHASH_SIZE:          4096
> >> > [    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
> >> > [    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
> >> > [    0.003824 ] ... CHAINHASH_SIZE:          32768
> >> > [    0.003881 ]  memory used by lock dependency info: 4911 kB
> >> > [    0.003938 ]  per task-struct memory footprint: 2304 bytes
> >> > [    0.003994 ] ------------------------
> >> > [    0.004049 ] | Locking API testsuite:
> >> > [    0.004104 ]
> >> > ----------------------------------------------------------------------------
> >> > [    0.004160 ]                                  | spin |wlock |rlock
> >> > |mutex | wsem | rsem |
> >> > [    0.004217 ]
> >> > --------------------------------------------------------------------------
> >> > [    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |
> >> > [    0.247299 ]
> >> > --------------------------------------------------------------------------
> >> > [    0.247363 ]               recursive read-lock:             |  ok  |
> >> > |  ok  |
> >> > [    0.254944 ]            recursive read-lock #2:             |  ok  |
> >> > |  ok  |
> >> > [    0.262477 ]             mixed read-write-lock:             |  ok  |
> >> > |  ok  |
> >> > [    0.269925 ]             mixed write-read-lock:             |  ok  |
> >> > |  ok  |
> >> > [    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> >> > |  ok  |
> >> > [    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> >> > |  ok  |
> >> > [    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> >> > |  ok  |
> >> > [    0.300859 ]
> >> > --------------------------------------------------------------------------
> >> > [    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> > [    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> > [    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> > [    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> > [    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> > [    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> > [    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> > [    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> > [    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> > [    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> > [    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> > [    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> > [    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> > [    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> > [    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> > [    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> > [    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> > [    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> > [    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> > [    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> > [    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> > [    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> > [    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> > [    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> > [    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> > [    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> > [    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> > [    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> > [    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> > [    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> > [    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> > [    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> > [    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> > [    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> > [    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> > [    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> > [    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> > [    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> > [    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> > [    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> > [    0.827223 ]       hard-irq read-recursion/123:  ok  |
> >> > [    0.831229 ]       soft-irq read-recursion/123:  ok  |
> >> > [    0.835128 ]       hard-irq read-recursion/132:  ok  |
> >> > [    0.838984 ]       soft-irq read-recursion/132:  ok  |
> >> > [    0.843014 ]       hard-irq read-recursion/213:  ok  |
> >> > [    0.846887 ]       soft-irq read-recursion/213:  ok  |
> >> > [    0.850914 ]       hard-irq read-recursion/231:  ok  |
> >> > [    0.854791 ]       soft-irq read-recursion/231:  ok  |
> >> > [    0.858667 ]       hard-irq read-recursion/312:  ok  |
> >> > [    0.862678 ]       soft-irq read-recursion/312:  ok  |
> >> > [    0.866573 ]       hard-irq read-recursion/321:  ok  |
> >> > [    0.870576 ]       soft-irq read-recursion/321:  ok  |
> >> > [    0.874470 ]
> >> > --------------------------------------------------------------------------
> >> > [    0.874529 ]   | Wound/wait tests |
> >> > [    0.874584 ]   ---------------------
> >> > [    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
> >> > [    0.886282 ]                ww contexts mixing:  ok  |  ok  |
> >> > [    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
> >> > |
> >> > [    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
> >> > [    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
> >> > |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> >> > [    0.959317 ]            spinlock nest unlocked:  ok  |
> >> > [    0.963229 ]   -----------------------------------------------------
> >> > [    0.963289 ]                                  |block | try  |context|
> >> > [    0.963345 ]   -----------------------------------------------------
> >> > [    0.963402 ]                           context:  ok  |  ok  |  ok  |
> >> > [    0.975067 ]                               try:  ok  |  ok  |  ok  |
> >> > [    0.986404 ]                             block:  ok  |  ok  |  ok  |
> >> > [    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
> >> > [    1.009525 ] -------------------------------------------------------
> >> > [    1.009588 ] Good, all 261 testcases passed! |
> >> > [    1.009645 ] ---------------------------------
> >> > [    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> >> > [    1.060152 ] pid_max: default: 32768 minimum: 301
> >> > [    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> >> > [    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> >> > bytes)
> >> > [    1.067262 ] CPU: Testing write buffer coherency: ok
> >> > [    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
> >> > [    1.082517 ] devtmpfs: initialized
> >> > [    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
> >> > variant 5 rev 1
> >> > [    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> >> > 0xffffffff, max_idle_ns: 19112604462750000 ns
> >> > [    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> >> > [    1.181399 ] pinctrl core: initialized pinctrl subsystem
> >> > [    1.204878 ] NET: Registered protocol family 16
> >> > [    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
> >> > allocations
> >> > [    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
> >> > [    1.335018 ] No ATAGs?
> >> > [    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> >> > [    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> >> > [    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> >> > [    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
> >> > [    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> >> > [    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> >> > pinctrl driver
> >> > [    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> >> > 0x(ptrval)
> >> > [    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> >> > 0x(ptrval)
> >> > [    1.719680 ] AT91: Detected SoC family: sama5d4
> >> > [    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
> >> > [    1.724446 ] VDD MCI1: supplied by VCC 3V3
> >> > [    1.730458 ] SCSI subsystem initialized
> >> > [    1.733270 ] usbcore: registered new interface driver usbfs
> >> > [    1.734011 ] usbcore: registered new interface driver hub
> >> > [    1.734521 ] usbcore: registered new device driver usb
> >> > [    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> >> > (rx) for DMA transfers
> >> > [    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> >> > 0x502).
> >> > [    1.744531 ] videodev: Linux video capture interface: v2.00
> >> > [    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
> >> > [    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
> >> > Giometti <giometti@linux.it>
> >> > [    1.745276 ] PTP clock support registered
> >> > [    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
> >> > [    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
> >> > [    2.567438 ] NET: Registered protocol family 2
> >> > [    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
> >> > 12288 bytes)
> >> > [    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
> >> > bytes)
> >> > [    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> >> > [    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
> >> > [    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> >> > [    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> >> > [    2.576049 ] NET: Registered protocol family 1
> >> > [    2.583998 ] RPC: Registered named UNIX socket transport module.
> >> > [    2.584202 ] RPC: Registered udp transport module.
> >> > [    2.584274 ] RPC: Registered tcp transport module.
> >> > [    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> >> > [    2.595180 ] [Xenomai] scheduling class idle registered.
> >> > [    2.595264 ] [Xenomai] scheduling class rt registered.
> >> > [    2.596739 ] I-pipe: head domain Xenomai registered.
> >> > [    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
> >> > [    2.631931 ] Initialise system trusted keyrings
> >> > [    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> >> > [    2.680240 ] Key type asymmetric registered
> >> > [    2.680621 ] Asymmetric key parser 'x509' registered
> >> > [    2.681033 ] io scheduler noop registered (default)
> >> > [    2.681119 ] io scheduler mq-deadline registered
> >> > [    2.681187 ] io scheduler kyber registered
> >> > [    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    3.749595 ] random: fast init done
> >> > [    4.057967 ] console [ttyS0] enabled
> >> > [    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    4.136696 ] brd: module loaded
> >> > [    4.249170 ] loop: module loaded
> >> > [    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> >> > (rx) for DMA transfers
> >> > [    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> >> > [    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> >> > at 0xf8010000 (irq 24)
> >> > [    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> >> > (rx) for DMA transfers
> >> > [    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> >> > at 0xfc018000 (irq 31)
> >> > [    4.349989 ] libphy: Fixed MDIO Bus: probed
> >> > [    4.362450 ] libphy: MACB_mii_bus: probed
> >> > [    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> >> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> >> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> >> > [    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> >> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> >> > [    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> >> > [    4.530712 ] ehci-atmel: EHCI Atmel driver
> >> > [    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
> >> > [    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> >> > bus number 1
> >> > [    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> >> > [    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> >> > [    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
> >> > idProduct=0002, bcdDevice= 4.19
> >> > [    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> >> > SerialNumber=1
> >> > [    4.613818 ] usb usb1: Product: EHCI Host Controller
> >> > [    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> >> > [    4.624337 ] usb usb1: SerialNumber: 600000.ehci
> >> > [    4.638766 ] hub 1-0:1.0: USB hub found
> >> > [    4.645049 ] hub 1-0:1.0: 3 ports detected
> >> > [    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> >> > [    4.666149 ] ohci-atmel: OHCI Atmel driver
> >> > [    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
> >> > [    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
> >> > number 2
> >> > [    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> >> > [    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
> >> > idProduct=0001, bcdDevice= 4.19
> >> > [    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> >> > SerialNumber=1
> >> > [    4.784659 ] usb usb2: Product: USB Host Controller
> >> > [    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> >> > [    4.795098 ] usb usb2: SerialNumber: at91
> >> > [    4.805171 ] hub 2-0:1.0: USB hub found
> >> > [    4.811383 ] hub 2-0:1.0: 3 ports detected
> >> > [    4.827989 ] usbcore: registered new interface driver cdc_acm
> >> > [    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
> >> > and ISDN adapters
> >> > [    4.842644 ] usbcore: registered new interface driver usb-storage
> >> > [    4.849656 ] usbcore: registered new interface driver usbserial_generic
> >> > [    4.857097 ] usbserial: USB Serial support registered for generic
> >> > [    4.863859 ] usbcore: registered new interface driver ftdi_sio
> >> > [    4.870025 ] usbserial: USB Serial support registered for FTDI USB
> >> > Serial Device
> >> > [    4.877858 ] usbcore: registered new interface driver pl2303
> >> > [    4.883870 ] usbserial: USB Serial support registered for pl2303
> >> > [    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> >> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> >> > [    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> >> > 0x00400000-0x004fffff] mapped at (ptrval)
> >> > [    4.943428 ] g_serial gadget: Gadget Serial v2.4
> >> > [    4.948109 ] g_serial gadget: g_serial ready
> >> > [    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
> >> > [    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> >> > [    4.976514 ] i2c /dev entries driver
> >> > [    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
> >> > [    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> >> > sec, nowayout = 0)
> >> > [    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
> >> > [    5.041289 ] sdhci: Copyright(c) Pierre Ossman
> >> > [    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
> >> > [    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> >> > [    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> >> > [    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> >> > [    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> >> > irq 28, 1 slots
> >> > [    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
> >> > [    5.132517 ] atmel_aes fc044000.aes: version: 0x201
> >> > [    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> >> > dma1chan1 for DMA transfers
> >> > [    5.172334 ] atmel_sha fc050000.sha: version: 0x420
> >> > [    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> >> > [    5.193368 ] atmel_sha fc050000.sha: Atmel
> >> > SHA1/SHA256/SHA224/SHA384/SHA512
> >> > [    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
> >> > [    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> >> > DMA transfers
> >> > [    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> >> > [    5.243183 ] usbcore: registered new interface driver usbhid
> >> > [    5.248897 ] usbhid: USB HID core driver
> >> > [    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> >> > [    5.279605 ] nand: Micron MT29F4G08ABAEAWP
> >> > [    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> >> > OOB size: 224
> >> > [    5.298878 ] Bad block table not found for chip 0
> >> > [    5.306500 ] Bad block table not found for chip 0
> >> > [    5.311258 ] Scanning device for bad blocks
> >> > [    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
> >> > [    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
> >> > [    5.802851 ] 6 fixed-partitions partitions found on MTD device
> >> > atmel_nand
> >> > [    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
> >> > [    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> >> > [    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
> >> > [    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> >> > [    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
> >> > [    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
> >> > [    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
> >> > [    6.039378 ] NET: Registered protocol family 10
> >> > [    6.060590 ] Segment Routing with IPv6
> >> > [    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> >> > [    6.075969 ] NET: Registered protocol family 17
> >> > [    6.093926 ] Loading compiled-in X.509 certificates
> >> > [    6.205946 ] input: gpio_keys as
> >> > /devices/platform/gpio_keys/input/input0
> >> > [    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
> >> > 02:15:53 UTC (1325384153)
> >> > [    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> >> > [   16.268525 ] Waiting up to 110 more seconds for network.
> >> > [   26.288522 ] Waiting up to 100 more seconds for network.
> >> >
> >> > It has not helped though, the result is still the same:
> >> >  - no ethernet cable attached - the kernel is alive
> >> >  - ethernet cable attached - the kernel hangs without any panic/error
> >> >    message
> >> >
> >> > So it it looks like that:
> >> > - system reset without Ethernet cable attached
> >> > - the kernel has been loaded from the NAND -> boot is going on
> >> > - on-board heartbeat LED is blinking periodically
> >> > - board is awaiting for ethernet link
> >> > - insert an Ethernet cable -> system freezed
> >> >
> >> > Maybe there are additional debug options that I can use to figure out what
> >> > is going on?
> >> >
> >> > Best regards,
> >> > Vladimir Petrigo
> >> 
> >> 
> >> Please provide the output of /proc/interrupts on this platform running
> >> the same kernel with CONFIG_IPIPE disabled. We need to figure out which
> >> IRQ chips may be active there. Thanks,
> >> 
> >> -- 
> >> Philippe.
> > There is the output:
> >
> > # uname -a
> > Linux buildroot 4.19.144 #1 Sat Feb 27 22:19:12 MSK 2021 armv7l GNU/Linux
> > # cat /proc/interrupts 
> >            CPU0       
> >  16:         10  atmel-aic5   3 Level     at91_tick
> >  17:          0  atmel-aic5  47 Level     atmel_usba_udc
> >  18:          1  atmel-aic5  46 Level     ehci_hcd:usb1, ohci_hcd:usb2
> >  20:       2138  atmel-aic5  50 Level     at_xdmac
> >  21:          0  atmel-aic5   8 Level     at_xdmac
> >  22:          1  atmel-aic5   1 Level     at91_rtc
> >  24:          7  atmel-aic5  37 Level     f8010000.spi
> >  25:          0  atmel-aic5  32 Level     f8014000.i2c
> >  26:        726  atmel-aic5  40 Level     tc_clkevt
> >  27:       2544  atmel-aic5  54 Level     eth0
> >  28:          0  atmel-aic5  36 Level     fc000000.mmc
> >  29:        224  atmel-aic5  30 Level     fc00c000.serial
> >  31:          0  atmel-aic5  38 Level     fc018000.spi
> >  36:          0  atmel-aic5  12 Level     atmel-aes
> >  37:          0  atmel-aic5  14 Level     atmel-tdes
> >  38:          0  atmel-aic5  15 Level     atmel-sha
> >  39:         22  atmel-aic5  22 Level     nfc
> >  46:          3      GPIO   1 Level     f8020000.ethernet-ffffffff:01
> >  47:          0      GPIO  31 Edge      atmel_usba_udc
> >  48:          1      GPIO   3 Edge      mmc-detect
> >  57:          1      GPIO   8 Edge      pb_user1
> > Err:          0
> >
> > I can add debug output to track down what interrupt causing freeze with
> > I-pipe enabled. If you may provide an example what places should be covered
> > with printing, that will be appreciated.
> >
> > Best regards,
> > Vladimir Petrigo
> 
> Incoming device interrupts are passed to __ipipe_grab_irq()
> (arch/arm/kernel/ipipe.c), which is the entry point of the pipeline. You
> should be able to use raw_printk() (CONFIG_RAW_PRINTK) to send trace
> output to the serial console. This is the same channel than printascii()
> on ARM, so you need to configure the DEBUG_LL uart device too.
> 
> -- 
> Philippe.
I added raw_printk() into the __ipipe_grab_irq() and here is the result:
RQ: 16, regs: (ptrval)     
IRQ: 45, regs: (ptrval)     
IRQ: 16, regs: (ptrval)     
IRQ: 16, regs: (ptrval)     
IRQ: 16, regs: (ptrval)
[    5.519714] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01: aIRQ: 16, regs: (ptrval)
ttached PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)

// !!! SKIP SOME STUFF BETWEEN THOSE LINES !!!!

[    6.503859] nand: 512 MIRQ: 16, regs: (ptrval)
iB, SLC, erase size: 256 KiB, page size: 4096, OOB size: 224
IRQ: 16, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
[    6.549760] Bad block table not found for chip 0
IRQ: 38, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 38, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
[    6.582574] Bad block table not foundIRQ: 16, regs: (ptrval)
 for chip 0
[    6.589701] Scanning device for bad blocks
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 20, regs: (ptrval)
IRQ: 16, regs: (ptrval)
IRQ: 45, regs: (ptrval)

So everything ends after IRQ 45 arrives at the end of the boot process. The
interesting part that IRQ 45 arrives somewhere in the middle, I assume that
occurres during Ethernet PHY probing. Ethernet PHY on the SAMA5D4 Xplained
boards is the Micrel KSZ8081.

Best regards,
Vladimir Petrigo


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-03  0:33       ` Vladimir Petrigo
@ 2021-03-03  9:48         ` Philippe Gerum
  2021-03-04  0:54           ` Vladimir Petrigo
  0 siblings, 1 reply; 9+ messages in thread
From: Philippe Gerum @ 2021-03-03  9:48 UTC (permalink / raw)
  To: Vladimir Petrigo; +Cc: Greg Gallagher, xenomai


Vladimir Petrigo <vladimir.petrigo@gmail.com> writes:

> On Tue, Mar 02, 2021 at 10:37:42AM +0100, Philippe Gerum wrote:
>> 
>> Vladimir Petrigo via Xenomai <xenomai@xenomai.org> writes:
>> 
>> > On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
>> >> On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
>> >> xenomai@xenomai.org> wrote:
>> >> 
>> >> >
>> >> > Hello,
>> >> >
>> >> > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
>> >> > ATSAMA5D4 Xplained board.
>> >> >
>> >> > Preliminary:
>> >> > - non-patched Linux kernel 4.19.144 works just fine
>> >> > - I-pipe patched kernel can successfully boot
>> >> > - when I insert an ethernet cable into the on-board ethernet port, the
>> >> >   kernel freezes and the reset is the only solution to get out of that
>> >> >   state. Without the ethernet cable inserted the kernel will work
>> >> >   indefinitely long trying to reach the network and obtain an IP address.
>> >> >   So I assume something may be wrong with Micrel KSZ8081 driver under
>> >> >   Xenomai
>> >> >
>> >> > Here is the boot log:
>> >> >
>> >> > [    0.000000 ] Booting Linux on physical CPU 0x0
>> >> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
>> >> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
>> >> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
>> >> > Feb 28 07:27:15 MSK 2021
>> >> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
>> >> > cr=10c53c7d
>> >> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
>> >> > instruction cache
>> >> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
>> >> > [    0.000000 ] Memory policy: Data cache writeback
>> >> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
>> >> > [    0.000000 ] random: get_random_bytes called from
>> >> > start_kernel+0x94/0x488 with crng_init=0
>> >> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
>> >> > 130048
>> >> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
>> >> > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
>> >> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
>> >> > bytes)
>> >> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
>> >> > bytes)
>> >> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
>> >> > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
>> >> > cma-reserved)
>> >> > [    0.000000 ] Virtual kernel memory layout:
>> >> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
>> >> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>> >> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
>> >> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
>> >> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
>> >> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
>> >> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
>> >> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
>> >> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
>> >> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
>> >> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
>> >> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
>> >> > latencies.
>> >> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
>> >> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
>> >> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
>> >> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
>> >> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
>> >> > 0xffffffff, max_idle_ns: 152900835740 ns
>> >> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
>> >> > every 171798691800ns
>> >> > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
>> >> > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
>> >> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
>> >> > [    0.000627 ] Interrupt pipeline (release #10)
>> >> > [    0.002773 ] console [rawcon-1] enabled
>> >> > [    0.003252 ] Console: colour dummy device 80x30
>> >> > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
>> >> > Inc., Ingo Molnar
>> >> > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
>> >> > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
>> >> > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
>> >> > [    0.003599 ] ... CLASSHASH_SIZE:          4096
>> >> > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
>> >> > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
>> >> > [    0.003762 ] ... CHAINHASH_SIZE:          32768
>> >> > [    0.003818 ]  memory used by lock dependency info: 4911 kB
>> >> > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
>> >> > [    0.003928 ] ------------------------
>> >> > [    0.003981 ] | Locking API testsuite:
>> >> > [    0.004036 ]
>> >> > ----------------------------------------------------------------------------
>> >> > [    0.004092 ]                                  | spin |wlock |rlock
>> >> > |mutex | wsem | rsem |
>> >> > [    0.004146 ]
>> >> >  --------------------------------------------------------------------------
>> >> > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |
>> >> > [    0.247217 ]
>> >> >  --------------------------------------------------------------------------
>> >> > [    0.247280 ]               recursive read-lock:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.254871 ]            recursive read-lock #2:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.262417 ]             mixed read-write-lock:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.269870 ]             mixed write-read-lock:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
>> >> >          |  ok  |
>> >> > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
>> >> >          |  ok  |
>> >> > [    0.300789 ]
>> >> >  --------------------------------------------------------------------------
>> >> > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> >> > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> >> > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> >> > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> >> > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
>> >> > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
>> >> > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> >> > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> >> > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> >> > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> >> > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> >> > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> >> > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> >> > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> >> > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> >> > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> >> > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> >> > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> >> > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> >> > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> >> > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> >> > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> >> > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> >> > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> >> > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> >> > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> >> > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> >> > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> >> > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> >> > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> >> > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> >> > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> >> > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> >> > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> >> > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> >> > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> >> > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> >> > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> >> > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> >> > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> >> > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> >> > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> >> > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> >> > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> >> > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> >> > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> >> > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
>> >> > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
>> >> > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
>> >> > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
>> >> > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
>> >> > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
>> >> > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
>> >> > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
>> >> > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
>> >> > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
>> >> > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
>> >> > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
>> >> > [    0.874467 ]
>> >> >  --------------------------------------------------------------------------
>> >> > [    0.874526 ]   | Wound/wait tests |
>> >> > [    0.874581 ]   ---------------------
>> >> > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
>> >> > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
>> >> > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
>> >> > ok  |
>> >> > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
>> >> > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
>> >> > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
>> >> > [    0.959308 ]            spinlock nest unlocked:  ok  |
>> >> > [    0.963226 ]   -----------------------------------------------------
>> >> > [    0.963284 ]                                  |block | try  |context|
>> >> > [    0.963340 ]   -----------------------------------------------------
>> >> > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
>> >> > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
>> >> > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
>> >> > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
>> >> > [    1.009546 ] -------------------------------------------------------
>> >> > [    1.009607 ] Good, all 261 testcases passed! |
>> >> > [    1.009661 ] ---------------------------------
>> >> > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
>> >> > [    1.060146 ] pid_max: default: 32768 minimum: 301
>> >> > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
>> >> > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
>> >> > bytes)
>> >> > [    1.067206 ] CPU: Testing write buffer coherency: ok
>> >> > [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
>> >> > [    1.082477 ] devtmpfs: initialized
>> >> > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
>> >> > variant 5 rev 1
>> >> > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
>> >> > 0xffffffff, max_idle_ns: 19112604462750000 ns
>> >> > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
>> >> > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
>> >> > [    1.206526 ] NET: Registered protocol family 16
>> >> > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
>> >> > allocations
>> >> > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
>> >> > [    1.333809 ] No ATAGs?
>> >> > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
>> >> > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
>> >> > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
>> >> > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
>> >> > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
>> >> > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
>> >> > pinctrl driver
>> >> > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
>> >> > 0x(ptrval)
>> >> > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
>> >> > 0x(ptrval)
>> >> > [    1.721621 ] AT91: Detected SoC family: sama5d4
>> >> > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
>> >> > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
>> >> > [    1.732481 ] SCSI subsystem initialized
>> >> > [    1.735296 ] usbcore: registered new interface driver usbfs
>> >> > [    1.736049 ] usbcore: registered new interface driver hub
>> >> > [    1.736561 ] usbcore: registered new device driver usb
>> >> > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
>> >> > (rx) for DMA transfers
>> >> > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
>> >> > 0x502).
>> >> > [    1.746533 ] videodev: Linux video capture interface: v2.00
>> >> > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
>> >> > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
>> >> > Rodolfo Giometti <giometti@linux.it>
>> >> > [    1.747288 ] PTP clock support registered
>> >> > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
>> >> > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
>> >> > [    2.574436 ] NET: Registered protocol family 2
>> >> > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
>> >> > 1, 12288 bytes)
>> >> > [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
>> >> > bytes)
>> >> > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
>> >> > [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
>> >> > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
>> >> > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
>> >> > [    2.583098 ] NET: Registered protocol family 1
>> >> > [    2.591094 ] RPC: Registered named UNIX socket transport module.
>> >> > [    2.591298 ] RPC: Registered udp transport module.
>> >> > [    2.591371 ] RPC: Registered tcp transport module.
>> >> > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
>> >> > [    2.602326 ] [Xenomai] scheduling class idle registered.
>> >> > [    2.602406 ] [Xenomai] scheduling class rt registered.
>> >> > [    2.603891 ] I-pipe: head domain Xenomai registered.
>> >> > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
>> >> > [    2.638984 ] Initialise system trusted keyrings
>> >> > [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
>> >> > [    2.687431 ] Key type asymmetric registered
>> >> > [    2.687813 ] Asymmetric key parser 'x509' registered
>> >> > [    2.688226 ] io scheduler noop registered (default)
>> >> > [    2.688308 ] io scheduler mq-deadline registered
>> >> > [    2.688376 ] io scheduler kyber registered
>> >> > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
>> >> > base_baud = 6250000) is a ATMEL_SERIAL
>> >> > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
>> >> > base_baud = 6250000) is a ATMEL_SERIAL
>> >> > [    3.756264 ] random: fast init done
>> >> > [    4.064725 ] console [ttyS0] enabled
>> >> > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
>> >> > base_baud = 6250000) is a ATMEL_SERIAL
>> >> > [    4.143473 ] brd: module loaded
>> >> > [    4.256253 ] loop: module loaded
>> >> > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
>> >> > (rx) for DMA transfers
>> >> > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
>> >> > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
>> >> > at 0xf8010000 (irq 24)
>> >> > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
>> >> > (rx) for DMA transfers
>> >> > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
>> >> > at 0xfc018000 (irq 31)
>> >> > [    4.356675 ] libphy: Fixed MDIO Bus: probed
>> >> > [    4.369182 ] libphy: MACB_mii_bus: probed
>> >> > [    4.399395 ] ------------[ cut here  ]------------
>> >> > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
>> >> > irq_set_chip+0xbc/0xcc
>> >> > [    4.411649 ] irqchip GPIO is not pipeline-safe!
>> >> > [    4.411660 ] Modules linked in:
>> >> > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
>> >> > [    4.424953 ] Hardware name: Atmel SAMA5
>> >> > [    4.428667 ] I-pipe domain: Linux
>> >> > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
>> >> > (show_stack+0x10/0x14)
>> >> > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
>> >> > (__warn+0xf4/0x10c)
>> >> > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
>> >> > (warn_slowpath_fmt+0x48/0x6c)
>> >> > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
>> >> > (irq_set_chip+0xbc/0xcc)
>> >> > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
>> >> > (irq_set_chip_and_handler_name+0x14/0x2c)
>> >> > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
>> >> > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
>> >> > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
>> >> > (irq_domain_associate+0x74/0x1ec)
>> >> > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
>> >> > (irq_create_mapping+0x64/0xc8)
>> >> > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
>> >> > (irq_create_fwspec_mapping+0x184/0x2c4)
>> >> > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
>> >> > (irq_create_of_mapping+0x5c/0x78)
>> >> > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
>> >> > (of_irq_get+0x6c/0xb8)
>> >> > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
>> >> > (of_mdiobus_register_phy+0x84/0x17c)
>> >> > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
>> >> > (of_mdiobus_register+0xf4/0x304)
>> >> > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
>> >> > (macb_probe+0x72c/0xad0)
>> >> > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
>> >> > (platform_drv_probe+0x48/0x98)
>> >> > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
>> >> > (really_probe+0x1d8/0x2c0)
>> >> > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
>> >> > (driver_probe_device+0x60/0x160)
>> >> > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
>> >> > (__driver_attach+0xe8/0xec)
>> >> > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
>> >> > (bus_for_each_dev+0x74/0xb4)
>> >> > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
>> >> > (bus_add_driver+0x18c/0x210)
>> >> > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
>> >> > (driver_register+0x7c/0x114)
>> >> > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
>> >> > (do_one_initcall+0x88/0x22c)
>> >> > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
>> >> > (kernel_init_freeable+0x26c/0x304)
>> >> > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
>> >> > (kernel_init+0x8/0x108)
>> >> > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
>> >> > (ret_from_fork+0x18/0x24)
>> >> > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
>> >> > [    4.644852 ] dfa0:                                     00000000
>> >> > 00000000 00000000 00000000
>> >> > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
>> >> > 00000000 00000000 00000000
>> >> > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
>> >> > [    4.667652 ] irq event stamp: 145160
>> >> > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
>> >> > _raw_spin_unlock_irqrestore+0x30/0x58
>> >> > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
>> >> > _raw_spin_lock_irqsave+0x1c/0x98
>> >> > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
>> >> > __do_softirq+0x2a4/0x420
>> >> > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
>> >> > irq_exit+0x1a4/0x1a8
>> >> > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
>> >> > [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
>> >> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
>> >> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
>> >> > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
>> >> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
>> >> > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>> >> > [    4.852778 ] ehci-atmel: EHCI Atmel driver
>> >> > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
>> >> > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
>> >> > bus number 1
>> >> > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
>> >> > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
>> >> > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
>> >> > idProduct=0002, bcdDevice= 4.19
>> >> > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
>> >> > SerialNumber=1
>> >> > [    4.935857 ] usb usb1: Product: EHCI Host Controller
>> >> > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
>> >> > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
>> >> > [    4.960887 ] hub 1-0:1.0: USB hub found
>> >> > [    4.967182 ] hub 1-0:1.0: 3 ports detected
>> >> > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>> >> > [    4.988376 ] ohci-atmel: OHCI Atmel driver
>> >> > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
>> >> > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
>> >> > bus number 2
>> >> > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
>> >> > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
>> >> > idProduct=0001, bcdDevice= 4.19
>> >> > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
>> >> > SerialNumber=1
>> >> > [    5.106711 ] usb usb2: Product: USB Host Controller
>> >> > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
>> >> > [    5.117146 ] usb usb2: SerialNumber: at91
>> >> > [    5.127252 ] hub 2-0:1.0: USB hub found
>> >> > [    5.133470 ] hub 2-0:1.0: 3 ports detected
>> >> > [    5.150121 ] usbcore: registered new interface driver cdc_acm
>> >> > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
>> >> > and ISDN adapters
>> >> > [    5.164776 ] usbcore: registered new interface driver usb-storage
>> >> > [    5.171788 ] usbcore: registered new interface driver usbserial_generic
>> >> > [    5.179229 ] usbserial: USB Serial support registered for generic
>> >> > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
>> >> > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
>> >> > Serial Device
>> >> > [    5.199977 ] usbcore: registered new interface driver pl2303
>> >> > [    5.205993 ] usbserial: USB Serial support registered for pl2303
>> >> > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
>> >> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
>> >> > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
>> >> > 0x00400000-0x004fffff] mapped at (ptrval)
>> >> > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
>> >> > [    5.270268 ] g_serial gadget: g_serial ready
>> >> > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
>> >> > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
>> >> > [    5.298694 ] i2c /dev entries driver
>> >> > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
>> >> > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
>> >> > sec, nowayout = 0)
>> >> > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
>> >> > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
>> >> > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
>> >> > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
>> >> > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
>> >> > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
>> >> > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
>> >> > irq 28, 1 slots
>> >> > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
>> >> > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
>> >> > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
>> >> > dma1chan1 for DMA transfers
>> >> > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
>> >> > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
>> >> > [    5.516378 ] atmel_sha fc050000.sha: Atmel
>> >> > SHA1/SHA256/SHA224/SHA384/SHA512
>> >> > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
>> >> > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
>> >> > DMA transfers
>> >> > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
>> >> > [    5.566514 ] usbcore: registered new interface driver usbhid
>> >> > [    5.572227 ] usbhid: USB HID core driver
>> >> > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
>> >> > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
>> >> > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
>> >> > OOB size: 224
>> >> > [    5.622318 ] Bad block table not found for chip 0
>> >> > [    5.629946 ] Bad block table not found for chip 0
>> >> > [    5.634709 ] Scanning device for bad blocks
>> >> > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
>> >> > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
>> >> > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
>> >> > atmel_nand
>> >> > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
>> >> > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
>> >> > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
>> >> > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
>> >> > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
>> >> > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
>> >> > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
>> >> > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
>> >> > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
>> >> > [    6.396804 ] NET: Registered protocol family 10
>> >> > [    6.418370 ] Segment Routing with IPv6
>> >> > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
>> >> > [    6.434188 ] NET: Registered protocol family 17
>> >> > [    6.452130 ] Loading compiled-in X.509 certificates
>> >> > [    6.565366 ] input: gpio_keys as
>> >> > /devices/platform/gpio_keys/input/input0
>> >> > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
>> >> > 07:59:53 UTC (1325491193)
>> >> > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
>> >> > [   16.620548 ] Waiting up to 110 more seconds for network.
>> >> >
>> >> > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
>> >> > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
>> >> > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
>> >> > same family.
>> >> >
>> >> > Any suggestions on how to narrow the root case of that freeze will be
>> >> > greatly appreciated.
>> >> >
>> >> > Best regards,
>> >> > Vladimir Petrigo
>> >> >
>> >> > The back trace in the log means that this chip hasn't been fully ported to
>> >> the ipipe kernel and is missing the flag to identify the gpiochip as
>> >> pipeline safe.   It is possible the ipipe kernel hasn't been ported
>> >> properly to this target.  Check the gpio driver and irq chip driver and the
>> >> timer driver to see if they have any ipipe related code.  It's possible
>> >> this target was supported by older ipipe versions but wasn't fully ported
>> >> to a recent version of the ipipe.  I'll check tonight when I get a chance
>> >> to confirm if this target has support.
>> >> 
>> >> -Greg
>> > Gregg,
>> >
>> > Thank you for your response. I was able to get rid of irqchip GPIO pipeline
>> > safety and the kernel boot log looks like that:
>> >
>> > Starting kernel ...
>> >
>> > [    0.000000 ] Booting Linux on physical CPU 0x0
>> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
>> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
>> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
>> > Mar 1 23:27:31 MSK 2021
>> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
>> > cr=10c53c7d
>> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
>> > instruction cache
>> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
>> > [    0.000000 ] Memory policy: Data cache writeback
>> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
>> > [    0.000000 ] random: get_random_bytes called from
>> > start_kernel+0x94/0x488 with crng_init=0
>> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
>> > 130048
>> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
>> > ip=dhcp
>> > nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
>> > rw
>> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
>> > bytes)
>> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
>> > bytes)
>> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
>> > rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
>> > cma-reserved)
>> > [    0.000000 ] Virtual kernel memory layout:
>> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
>> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
>> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
>> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
>> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
>> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
>> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
>> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
>> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
>> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
>> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
>> > latencies.
>> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
>> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
>> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
>> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
>> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
>> > 0xffffffff, max_idle_ns: 152900835740 ns
>> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
>> > 171798691800ns
>> > [    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
>> > [    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
>> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
>> > [    0.000628 ] Interrupt pipeline (release #10)
>> > [    0.002823 ] console [rawcon-1] enabled
>> > [    0.003301 ] Console: colour dummy device 80x30
>> > [    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
>> > Inc., Ingo Molnar
>> > [    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
>> > [    0.003542 ] ... MAX_LOCK_DEPTH:          48
>> > [    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
>> > [    0.003655 ] ... CLASSHASH_SIZE:          4096
>> > [    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
>> > [    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
>> > [    0.003824 ] ... CHAINHASH_SIZE:          32768
>> > [    0.003881 ]  memory used by lock dependency info: 4911 kB
>> > [    0.003938 ]  per task-struct memory footprint: 2304 bytes
>> > [    0.003994 ] ------------------------
>> > [    0.004049 ] | Locking API testsuite:
>> > [    0.004104 ]
>> > ----------------------------------------------------------------------------
>> > [    0.004160 ]                                  | spin |wlock |rlock
>> > |mutex | wsem | rsem |
>> > [    0.004217 ]
>> > --------------------------------------------------------------------------
>> > [    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |
>> > [    0.247299 ]
>> > --------------------------------------------------------------------------
>> > [    0.247363 ]               recursive read-lock:             |  ok  |
>> > |  ok  |
>> > [    0.254944 ]            recursive read-lock #2:             |  ok  |
>> > |  ok  |
>> > [    0.262477 ]             mixed read-write-lock:             |  ok  |
>> > |  ok  |
>> > [    0.269925 ]             mixed write-read-lock:             |  ok  |
>> > |  ok  |
>> > [    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
>> > |  ok  |
>> > [    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
>> > |  ok  |
>> > [    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
>> > |  ok  |
>> > [    0.300859 ]
>> > --------------------------------------------------------------------------
>> > [    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> > [    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> > [    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> > [    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> > [    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> > [    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> > [    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> > [    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> > [    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> > [    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> > [    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> > [    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> > [    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> > [    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> > [    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> > [    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> > [    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> > [    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> > [    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> > [    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> > [    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> > [    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> > [    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> > [    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> > [    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> > [    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> > [    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> > [    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> > [    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> > [    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> > [    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> > [    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> > [    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> > [    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> > [    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> > [    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> > [    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> > [    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> > [    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> > [    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> > [    0.827223 ]       hard-irq read-recursion/123:  ok  |
>> > [    0.831229 ]       soft-irq read-recursion/123:  ok  |
>> > [    0.835128 ]       hard-irq read-recursion/132:  ok  |
>> > [    0.838984 ]       soft-irq read-recursion/132:  ok  |
>> > [    0.843014 ]       hard-irq read-recursion/213:  ok  |
>> > [    0.846887 ]       soft-irq read-recursion/213:  ok  |
>> > [    0.850914 ]       hard-irq read-recursion/231:  ok  |
>> > [    0.854791 ]       soft-irq read-recursion/231:  ok  |
>> > [    0.858667 ]       hard-irq read-recursion/312:  ok  |
>> > [    0.862678 ]       soft-irq read-recursion/312:  ok  |
>> > [    0.866573 ]       hard-irq read-recursion/321:  ok  |
>> > [    0.870576 ]       soft-irq read-recursion/321:  ok  |
>> > [    0.874470 ]
>> > --------------------------------------------------------------------------
>> > [    0.874529 ]   | Wound/wait tests |
>> > [    0.874584 ]   ---------------------
>> > [    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
>> > [    0.886282 ]                ww contexts mixing:  ok  |  ok  |
>> > [    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
>> > |
>> > [    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
>> > [    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
>> > |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
>> > [    0.959317 ]            spinlock nest unlocked:  ok  |
>> > [    0.963229 ]   -----------------------------------------------------
>> > [    0.963289 ]                                  |block | try  |context|
>> > [    0.963345 ]   -----------------------------------------------------
>> > [    0.963402 ]                           context:  ok  |  ok  |  ok  |
>> > [    0.975067 ]                               try:  ok  |  ok  |  ok  |
>> > [    0.986404 ]                             block:  ok  |  ok  |  ok  |
>> > [    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
>> > [    1.009525 ] -------------------------------------------------------
>> > [    1.009588 ] Good, all 261 testcases passed! |
>> > [    1.009645 ] ---------------------------------
>> > [    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
>> > [    1.060152 ] pid_max: default: 32768 minimum: 301
>> > [    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
>> > [    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
>> > bytes)
>> > [    1.067262 ] CPU: Testing write buffer coherency: ok
>> > [    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
>> > [    1.082517 ] devtmpfs: initialized
>> > [    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
>> > variant 5 rev 1
>> > [    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
>> > 0xffffffff, max_idle_ns: 19112604462750000 ns
>> > [    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
>> > [    1.181399 ] pinctrl core: initialized pinctrl subsystem
>> > [    1.204878 ] NET: Registered protocol family 16
>> > [    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
>> > allocations
>> > [    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
>> > [    1.335018 ] No ATAGs?
>> > [    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
>> > [    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
>> > [    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
>> > [    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
>> > [    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
>> > [    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
>> > pinctrl driver
>> > [    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
>> > 0x(ptrval)
>> > [    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
>> > 0x(ptrval)
>> > [    1.719680 ] AT91: Detected SoC family: sama5d4
>> > [    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
>> > [    1.724446 ] VDD MCI1: supplied by VCC 3V3
>> > [    1.730458 ] SCSI subsystem initialized
>> > [    1.733270 ] usbcore: registered new interface driver usbfs
>> > [    1.734011 ] usbcore: registered new interface driver hub
>> > [    1.734521 ] usbcore: registered new device driver usb
>> > [    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
>> > (rx) for DMA transfers
>> > [    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
>> > 0x502).
>> > [    1.744531 ] videodev: Linux video capture interface: v2.00
>> > [    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
>> > [    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
>> > Giometti <giometti@linux.it>
>> > [    1.745276 ] PTP clock support registered
>> > [    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
>> > [    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
>> > [    2.567438 ] NET: Registered protocol family 2
>> > [    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
>> > 12288 bytes)
>> > [    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
>> > bytes)
>> > [    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
>> > [    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
>> > [    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
>> > [    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
>> > [    2.576049 ] NET: Registered protocol family 1
>> > [    2.583998 ] RPC: Registered named UNIX socket transport module.
>> > [    2.584202 ] RPC: Registered udp transport module.
>> > [    2.584274 ] RPC: Registered tcp transport module.
>> > [    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
>> > [    2.595180 ] [Xenomai] scheduling class idle registered.
>> > [    2.595264 ] [Xenomai] scheduling class rt registered.
>> > [    2.596739 ] I-pipe: head domain Xenomai registered.
>> > [    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
>> > [    2.631931 ] Initialise system trusted keyrings
>> > [    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
>> > [    2.680240 ] Key type asymmetric registered
>> > [    2.680621 ] Asymmetric key parser 'x509' registered
>> > [    2.681033 ] io scheduler noop registered (default)
>> > [    2.681119 ] io scheduler mq-deadline registered
>> > [    2.681187 ] io scheduler kyber registered
>> > [    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    3.749595 ] random: fast init done
>> > [    4.057967 ] console [ttyS0] enabled
>> > [    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    4.136696 ] brd: module loaded
>> > [    4.249170 ] loop: module loaded
>> > [    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
>> > (rx) for DMA transfers
>> > [    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
>> > [    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
>> > at 0xf8010000 (irq 24)
>> > [    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
>> > (rx) for DMA transfers
>> > [    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
>> > at 0xfc018000 (irq 31)
>> > [    4.349989 ] libphy: Fixed MDIO Bus: probed
>> > [    4.362450 ] libphy: MACB_mii_bus: probed
>> > [    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
>> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
>> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
>> > [    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
>> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
>> > [    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>> > [    4.530712 ] ehci-atmel: EHCI Atmel driver
>> > [    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
>> > [    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
>> > bus number 1
>> > [    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
>> > [    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
>> > [    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
>> > idProduct=0002, bcdDevice= 4.19
>> > [    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
>> > SerialNumber=1
>> > [    4.613818 ] usb usb1: Product: EHCI Host Controller
>> > [    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
>> > [    4.624337 ] usb usb1: SerialNumber: 600000.ehci
>> > [    4.638766 ] hub 1-0:1.0: USB hub found
>> > [    4.645049 ] hub 1-0:1.0: 3 ports detected
>> > [    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>> > [    4.666149 ] ohci-atmel: OHCI Atmel driver
>> > [    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
>> > [    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
>> > number 2
>> > [    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
>> > [    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
>> > idProduct=0001, bcdDevice= 4.19
>> > [    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
>> > SerialNumber=1
>> > [    4.784659 ] usb usb2: Product: USB Host Controller
>> > [    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
>> > [    4.795098 ] usb usb2: SerialNumber: at91
>> > [    4.805171 ] hub 2-0:1.0: USB hub found
>> > [    4.811383 ] hub 2-0:1.0: 3 ports detected
>> > [    4.827989 ] usbcore: registered new interface driver cdc_acm
>> > [    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
>> > and ISDN adapters
>> > [    4.842644 ] usbcore: registered new interface driver usb-storage
>> > [    4.849656 ] usbcore: registered new interface driver usbserial_generic
>> > [    4.857097 ] usbserial: USB Serial support registered for generic
>> > [    4.863859 ] usbcore: registered new interface driver ftdi_sio
>> > [    4.870025 ] usbserial: USB Serial support registered for FTDI USB
>> > Serial Device
>> > [    4.877858 ] usbcore: registered new interface driver pl2303
>> > [    4.883870 ] usbserial: USB Serial support registered for pl2303
>> > [    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
>> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
>> > [    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
>> > 0x00400000-0x004fffff] mapped at (ptrval)
>> > [    4.943428 ] g_serial gadget: Gadget Serial v2.4
>> > [    4.948109 ] g_serial gadget: g_serial ready
>> > [    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
>> > [    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
>> > [    4.976514 ] i2c /dev entries driver
>> > [    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
>> > [    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
>> > sec, nowayout = 0)
>> > [    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
>> > [    5.041289 ] sdhci: Copyright(c) Pierre Ossman
>> > [    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
>> > [    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
>> > [    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
>> > [    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
>> > [    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
>> > irq 28, 1 slots
>> > [    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
>> > [    5.132517 ] atmel_aes fc044000.aes: version: 0x201
>> > [    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
>> > dma1chan1 for DMA transfers
>> > [    5.172334 ] atmel_sha fc050000.sha: version: 0x420
>> > [    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
>> > [    5.193368 ] atmel_sha fc050000.sha: Atmel
>> > SHA1/SHA256/SHA224/SHA384/SHA512
>> > [    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
>> > [    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
>> > DMA transfers
>> > [    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
>> > [    5.243183 ] usbcore: registered new interface driver usbhid
>> > [    5.248897 ] usbhid: USB HID core driver
>> > [    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
>> > [    5.279605 ] nand: Micron MT29F4G08ABAEAWP
>> > [    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
>> > OOB size: 224
>> > [    5.298878 ] Bad block table not found for chip 0
>> > [    5.306500 ] Bad block table not found for chip 0
>> > [    5.311258 ] Scanning device for bad blocks
>> > [    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
>> > [    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
>> > [    5.802851 ] 6 fixed-partitions partitions found on MTD device
>> > atmel_nand
>> > [    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
>> > [    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
>> > [    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
>> > [    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
>> > [    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
>> > [    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
>> > [    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
>> > [    6.039378 ] NET: Registered protocol family 10
>> > [    6.060590 ] Segment Routing with IPv6
>> > [    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
>> > [    6.075969 ] NET: Registered protocol family 17
>> > [    6.093926 ] Loading compiled-in X.509 certificates
>> > [    6.205946 ] input: gpio_keys as
>> > /devices/platform/gpio_keys/input/input0
>> > [    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
>> > 02:15:53 UTC (1325384153)
>> > [    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
>> > [   16.268525 ] Waiting up to 110 more seconds for network.
>> > [   26.288522 ] Waiting up to 100 more seconds for network.
>> >
>> > It has not helped though, the result is still the same:
>> >  - no ethernet cable attached - the kernel is alive
>> >  - ethernet cable attached - the kernel hangs without any panic/error
>> >    message
>> >
>> > So it it looks like that:
>> > - system reset without Ethernet cable attached
>> > - the kernel has been loaded from the NAND -> boot is going on
>> > - on-board heartbeat LED is blinking periodically
>> > - board is awaiting for ethernet link
>> > - insert an Ethernet cable -> system freezed
>> >
>> > Maybe there are additional debug options that I can use to figure out what
>> > is going on?
>> >
>> > Best regards,
>> > Vladimir Petrigo
>> 
>> 
>> Please provide the output of /proc/interrupts on this platform running
>> the same kernel with CONFIG_IPIPE disabled. We need to figure out which
>> IRQ chips may be active there. Thanks,
>> 
>> -- 
>> Philippe.
> There is the output:
>
> # uname -a
> Linux buildroot 4.19.144 #1 Sat Feb 27 22:19:12 MSK 2021 armv7l GNU/Linux
> # cat /proc/interrupts 
>            CPU0       
>  16:         10  atmel-aic5   3 Level     at91_tick
>  17:          0  atmel-aic5  47 Level     atmel_usba_udc
>  18:          1  atmel-aic5  46 Level     ehci_hcd:usb1, ohci_hcd:usb2
>  20:       2138  atmel-aic5  50 Level     at_xdmac
>  21:          0  atmel-aic5   8 Level     at_xdmac
>  22:          1  atmel-aic5   1 Level     at91_rtc
>  24:          7  atmel-aic5  37 Level     f8010000.spi
>  25:          0  atmel-aic5  32 Level     f8014000.i2c
>  26:        726  atmel-aic5  40 Level     tc_clkevt
>  27:       2544  atmel-aic5  54 Level     eth0
>  28:          0  atmel-aic5  36 Level     fc000000.mmc
>  29:        224  atmel-aic5  30 Level     fc00c000.serial
>  31:          0  atmel-aic5  38 Level     fc018000.spi
>  36:          0  atmel-aic5  12 Level     atmel-aes
>  37:          0  atmel-aic5  14 Level     atmel-tdes
>  38:          0  atmel-aic5  15 Level     atmel-sha
>  39:         22  atmel-aic5  22 Level     nfc
>  46:          3      GPIO   1 Level     f8020000.ethernet-ffffffff:01
>  47:          0      GPIO  31 Edge      atmel_usba_udc
>  48:          1      GPIO   3 Edge      mmc-detect
>  57:          1      GPIO   8 Edge      pb_user1
> Err:          0
>
> I can add debug output to track down what interrupt causing freeze with
> I-pipe enabled. If you may provide an example what places should be covered
> with printing, that will be appreciated.
>
> Best regards,
> Vladimir Petrigo

Incoming device interrupts are passed to __ipipe_grab_irq()
(arch/arm/kernel/ipipe.c), which is the entry point of the pipeline. You
should be able to use raw_printk() (CONFIG_RAW_PRINTK) to send trace
output to the serial console. This is the same channel than printascii()
on ARM, so you need to configure the DEBUG_LL uart device too.

-- 
Philippe.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-02  9:37     ` Philippe Gerum
@ 2021-03-03  0:33       ` Vladimir Petrigo
  2021-03-03  9:48         ` Philippe Gerum
  0 siblings, 1 reply; 9+ messages in thread
From: Vladimir Petrigo @ 2021-03-03  0:33 UTC (permalink / raw)
  To: Philippe Gerum; +Cc: Greg Gallagher, xenomai

On Tue, Mar 02, 2021 at 10:37:42AM +0100, Philippe Gerum wrote:
> 
> Vladimir Petrigo via Xenomai <xenomai@xenomai.org> writes:
> 
> > On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
> >> On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
> >> xenomai@xenomai.org> wrote:
> >> 
> >> >
> >> > Hello,
> >> >
> >> > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
> >> > ATSAMA5D4 Xplained board.
> >> >
> >> > Preliminary:
> >> > - non-patched Linux kernel 4.19.144 works just fine
> >> > - I-pipe patched kernel can successfully boot
> >> > - when I insert an ethernet cable into the on-board ethernet port, the
> >> >   kernel freezes and the reset is the only solution to get out of that
> >> >   state. Without the ethernet cable inserted the kernel will work
> >> >   indefinitely long trying to reach the network and obtain an IP address.
> >> >   So I assume something may be wrong with Micrel KSZ8081 driver under
> >> >   Xenomai
> >> >
> >> > Here is the boot log:
> >> >
> >> > [    0.000000 ] Booting Linux on physical CPU 0x0
> >> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> >> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> >> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
> >> > Feb 28 07:27:15 MSK 2021
> >> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> >> > cr=10c53c7d
> >> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> >> > instruction cache
> >> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> >> > [    0.000000 ] Memory policy: Data cache writeback
> >> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> >> > [    0.000000 ] random: get_random_bytes called from
> >> > start_kernel+0x94/0x488 with crng_init=0
> >> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> >> > 130048
> >> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> >> > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
> >> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> >> > bytes)
> >> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> >> > bytes)
> >> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
> >> > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> >> > cma-reserved)
> >> > [    0.000000 ] Virtual kernel memory layout:
> >> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> >> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> >> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> >> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> >> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> >> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> >> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> >> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
> >> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> >> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> >> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> >> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> >> > latencies.
> >> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> >> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> >> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> >> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> >> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> >> > 0xffffffff, max_idle_ns: 152900835740 ns
> >> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
> >> > every 171798691800ns
> >> > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> >> > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> >> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> >> > [    0.000627 ] Interrupt pipeline (release #10)
> >> > [    0.002773 ] console [rawcon-1] enabled
> >> > [    0.003252 ] Console: colour dummy device 80x30
> >> > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> >> > Inc., Ingo Molnar
> >> > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> >> > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
> >> > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
> >> > [    0.003599 ] ... CLASSHASH_SIZE:          4096
> >> > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
> >> > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
> >> > [    0.003762 ] ... CHAINHASH_SIZE:          32768
> >> > [    0.003818 ]  memory used by lock dependency info: 4911 kB
> >> > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
> >> > [    0.003928 ] ------------------------
> >> > [    0.003981 ] | Locking API testsuite:
> >> > [    0.004036 ]
> >> > ----------------------------------------------------------------------------
> >> > [    0.004092 ]                                  | spin |wlock |rlock
> >> > |mutex | wsem | rsem |
> >> > [    0.004146 ]
> >> >  --------------------------------------------------------------------------
> >> > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |
> >> > [    0.247217 ]
> >> >  --------------------------------------------------------------------------
> >> > [    0.247280 ]               recursive read-lock:             |  ok  |
> >> >          |  ok  |
> >> > [    0.254871 ]            recursive read-lock #2:             |  ok  |
> >> >          |  ok  |
> >> > [    0.262417 ]             mixed read-write-lock:             |  ok  |
> >> >          |  ok  |
> >> > [    0.269870 ]             mixed write-read-lock:             |  ok  |
> >> >          |  ok  |
> >> > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> >> >          |  ok  |
> >> > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> >> >          |  ok  |
> >> > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> >> >          |  ok  |
> >> > [    0.300789 ]
> >> >  --------------------------------------------------------------------------
> >> > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> >> > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> >> > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> >> > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> >> > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> >> > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> >> > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> >> > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> >> > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> >> > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> >> > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> >> > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> >> > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> >> > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> >> > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> >> > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> >> > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> >> > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> >> > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> >> > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> >> > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> >> > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> >> > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
> >> > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
> >> > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
> >> > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
> >> > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
> >> > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
> >> > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
> >> > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
> >> > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
> >> > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
> >> > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
> >> > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
> >> > [    0.874467 ]
> >> >  --------------------------------------------------------------------------
> >> > [    0.874526 ]   | Wound/wait tests |
> >> > [    0.874581 ]   ---------------------
> >> > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
> >> > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
> >> > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
> >> > ok  |
> >> > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
> >> > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
> >> > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> >> > [    0.959308 ]            spinlock nest unlocked:  ok  |
> >> > [    0.963226 ]   -----------------------------------------------------
> >> > [    0.963284 ]                                  |block | try  |context|
> >> > [    0.963340 ]   -----------------------------------------------------
> >> > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
> >> > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
> >> > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
> >> > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
> >> > [    1.009546 ] -------------------------------------------------------
> >> > [    1.009607 ] Good, all 261 testcases passed! |
> >> > [    1.009661 ] ---------------------------------
> >> > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> >> > [    1.060146 ] pid_max: default: 32768 minimum: 301
> >> > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> >> > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> >> > bytes)
> >> > [    1.067206 ] CPU: Testing write buffer coherency: ok
> >> > [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
> >> > [    1.082477 ] devtmpfs: initialized
> >> > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
> >> > variant 5 rev 1
> >> > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> >> > 0xffffffff, max_idle_ns: 19112604462750000 ns
> >> > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> >> > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
> >> > [    1.206526 ] NET: Registered protocol family 16
> >> > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
> >> > allocations
> >> > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
> >> > [    1.333809 ] No ATAGs?
> >> > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> >> > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> >> > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> >> > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
> >> > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> >> > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> >> > pinctrl driver
> >> > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> >> > 0x(ptrval)
> >> > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> >> > 0x(ptrval)
> >> > [    1.721621 ] AT91: Detected SoC family: sama5d4
> >> > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
> >> > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
> >> > [    1.732481 ] SCSI subsystem initialized
> >> > [    1.735296 ] usbcore: registered new interface driver usbfs
> >> > [    1.736049 ] usbcore: registered new interface driver hub
> >> > [    1.736561 ] usbcore: registered new device driver usb
> >> > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> >> > (rx) for DMA transfers
> >> > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> >> > 0x502).
> >> > [    1.746533 ] videodev: Linux video capture interface: v2.00
> >> > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
> >> > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
> >> > Rodolfo Giometti <giometti@linux.it>
> >> > [    1.747288 ] PTP clock support registered
> >> > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
> >> > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
> >> > [    2.574436 ] NET: Registered protocol family 2
> >> > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
> >> > 1, 12288 bytes)
> >> > [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
> >> > bytes)
> >> > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> >> > [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
> >> > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> >> > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> >> > [    2.583098 ] NET: Registered protocol family 1
> >> > [    2.591094 ] RPC: Registered named UNIX socket transport module.
> >> > [    2.591298 ] RPC: Registered udp transport module.
> >> > [    2.591371 ] RPC: Registered tcp transport module.
> >> > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> >> > [    2.602326 ] [Xenomai] scheduling class idle registered.
> >> > [    2.602406 ] [Xenomai] scheduling class rt registered.
> >> > [    2.603891 ] I-pipe: head domain Xenomai registered.
> >> > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
> >> > [    2.638984 ] Initialise system trusted keyrings
> >> > [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> >> > [    2.687431 ] Key type asymmetric registered
> >> > [    2.687813 ] Asymmetric key parser 'x509' registered
> >> > [    2.688226 ] io scheduler noop registered (default)
> >> > [    2.688308 ] io scheduler mq-deadline registered
> >> > [    2.688376 ] io scheduler kyber registered
> >> > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    3.756264 ] random: fast init done
> >> > [    4.064725 ] console [ttyS0] enabled
> >> > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> >> > base_baud = 6250000) is a ATMEL_SERIAL
> >> > [    4.143473 ] brd: module loaded
> >> > [    4.256253 ] loop: module loaded
> >> > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> >> > (rx) for DMA transfers
> >> > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> >> > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> >> > at 0xf8010000 (irq 24)
> >> > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> >> > (rx) for DMA transfers
> >> > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> >> > at 0xfc018000 (irq 31)
> >> > [    4.356675 ] libphy: Fixed MDIO Bus: probed
> >> > [    4.369182 ] libphy: MACB_mii_bus: probed
> >> > [    4.399395 ] ------------[ cut here  ]------------
> >> > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
> >> > irq_set_chip+0xbc/0xcc
> >> > [    4.411649 ] irqchip GPIO is not pipeline-safe!
> >> > [    4.411660 ] Modules linked in:
> >> > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
> >> > [    4.424953 ] Hardware name: Atmel SAMA5
> >> > [    4.428667 ] I-pipe domain: Linux
> >> > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
> >> > (show_stack+0x10/0x14)
> >> > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
> >> > (__warn+0xf4/0x10c)
> >> > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
> >> > (warn_slowpath_fmt+0x48/0x6c)
> >> > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
> >> > (irq_set_chip+0xbc/0xcc)
> >> > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
> >> > (irq_set_chip_and_handler_name+0x14/0x2c)
> >> > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
> >> > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
> >> > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
> >> > (irq_domain_associate+0x74/0x1ec)
> >> > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
> >> > (irq_create_mapping+0x64/0xc8)
> >> > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
> >> > (irq_create_fwspec_mapping+0x184/0x2c4)
> >> > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
> >> > (irq_create_of_mapping+0x5c/0x78)
> >> > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
> >> > (of_irq_get+0x6c/0xb8)
> >> > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
> >> > (of_mdiobus_register_phy+0x84/0x17c)
> >> > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
> >> > (of_mdiobus_register+0xf4/0x304)
> >> > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
> >> > (macb_probe+0x72c/0xad0)
> >> > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
> >> > (platform_drv_probe+0x48/0x98)
> >> > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
> >> > (really_probe+0x1d8/0x2c0)
> >> > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
> >> > (driver_probe_device+0x60/0x160)
> >> > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
> >> > (__driver_attach+0xe8/0xec)
> >> > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
> >> > (bus_for_each_dev+0x74/0xb4)
> >> > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
> >> > (bus_add_driver+0x18c/0x210)
> >> > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
> >> > (driver_register+0x7c/0x114)
> >> > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
> >> > (do_one_initcall+0x88/0x22c)
> >> > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
> >> > (kernel_init_freeable+0x26c/0x304)
> >> > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
> >> > (kernel_init+0x8/0x108)
> >> > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
> >> > (ret_from_fork+0x18/0x24)
> >> > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
> >> > [    4.644852 ] dfa0:                                     00000000
> >> > 00000000 00000000 00000000
> >> > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
> >> > 00000000 00000000 00000000
> >> > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
> >> > [    4.667652 ] irq event stamp: 145160
> >> > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
> >> > _raw_spin_unlock_irqrestore+0x30/0x58
> >> > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
> >> > _raw_spin_lock_irqsave+0x1c/0x98
> >> > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
> >> > __do_softirq+0x2a4/0x420
> >> > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
> >> > irq_exit+0x1a4/0x1a8
> >> > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
> >> > [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> >> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> >> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> >> > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> >> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> >> > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> >> > [    4.852778 ] ehci-atmel: EHCI Atmel driver
> >> > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
> >> > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> >> > bus number 1
> >> > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> >> > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> >> > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
> >> > idProduct=0002, bcdDevice= 4.19
> >> > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> >> > SerialNumber=1
> >> > [    4.935857 ] usb usb1: Product: EHCI Host Controller
> >> > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> >> > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
> >> > [    4.960887 ] hub 1-0:1.0: USB hub found
> >> > [    4.967182 ] hub 1-0:1.0: 3 ports detected
> >> > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> >> > [    4.988376 ] ohci-atmel: OHCI Atmel driver
> >> > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
> >> > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
> >> > bus number 2
> >> > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> >> > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
> >> > idProduct=0001, bcdDevice= 4.19
> >> > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> >> > SerialNumber=1
> >> > [    5.106711 ] usb usb2: Product: USB Host Controller
> >> > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> >> > [    5.117146 ] usb usb2: SerialNumber: at91
> >> > [    5.127252 ] hub 2-0:1.0: USB hub found
> >> > [    5.133470 ] hub 2-0:1.0: 3 ports detected
> >> > [    5.150121 ] usbcore: registered new interface driver cdc_acm
> >> > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
> >> > and ISDN adapters
> >> > [    5.164776 ] usbcore: registered new interface driver usb-storage
> >> > [    5.171788 ] usbcore: registered new interface driver usbserial_generic
> >> > [    5.179229 ] usbserial: USB Serial support registered for generic
> >> > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
> >> > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
> >> > Serial Device
> >> > [    5.199977 ] usbcore: registered new interface driver pl2303
> >> > [    5.205993 ] usbserial: USB Serial support registered for pl2303
> >> > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> >> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> >> > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> >> > 0x00400000-0x004fffff] mapped at (ptrval)
> >> > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
> >> > [    5.270268 ] g_serial gadget: g_serial ready
> >> > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
> >> > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> >> > [    5.298694 ] i2c /dev entries driver
> >> > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
> >> > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> >> > sec, nowayout = 0)
> >> > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
> >> > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
> >> > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
> >> > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> >> > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> >> > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> >> > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> >> > irq 28, 1 slots
> >> > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
> >> > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
> >> > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> >> > dma1chan1 for DMA transfers
> >> > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
> >> > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> >> > [    5.516378 ] atmel_sha fc050000.sha: Atmel
> >> > SHA1/SHA256/SHA224/SHA384/SHA512
> >> > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
> >> > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> >> > DMA transfers
> >> > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> >> > [    5.566514 ] usbcore: registered new interface driver usbhid
> >> > [    5.572227 ] usbhid: USB HID core driver
> >> > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> >> > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
> >> > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> >> > OOB size: 224
> >> > [    5.622318 ] Bad block table not found for chip 0
> >> > [    5.629946 ] Bad block table not found for chip 0
> >> > [    5.634709 ] Scanning device for bad blocks
> >> > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
> >> > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
> >> > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
> >> > atmel_nand
> >> > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
> >> > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> >> > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
> >> > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> >> > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
> >> > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
> >> > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
> >> > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
> >> > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
> >> > [    6.396804 ] NET: Registered protocol family 10
> >> > [    6.418370 ] Segment Routing with IPv6
> >> > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> >> > [    6.434188 ] NET: Registered protocol family 17
> >> > [    6.452130 ] Loading compiled-in X.509 certificates
> >> > [    6.565366 ] input: gpio_keys as
> >> > /devices/platform/gpio_keys/input/input0
> >> > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
> >> > 07:59:53 UTC (1325491193)
> >> > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> >> > [   16.620548 ] Waiting up to 110 more seconds for network.
> >> >
> >> > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
> >> > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
> >> > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
> >> > same family.
> >> >
> >> > Any suggestions on how to narrow the root case of that freeze will be
> >> > greatly appreciated.
> >> >
> >> > Best regards,
> >> > Vladimir Petrigo
> >> >
> >> > The back trace in the log means that this chip hasn't been fully ported to
> >> the ipipe kernel and is missing the flag to identify the gpiochip as
> >> pipeline safe.   It is possible the ipipe kernel hasn't been ported
> >> properly to this target.  Check the gpio driver and irq chip driver and the
> >> timer driver to see if they have any ipipe related code.  It's possible
> >> this target was supported by older ipipe versions but wasn't fully ported
> >> to a recent version of the ipipe.  I'll check tonight when I get a chance
> >> to confirm if this target has support.
> >> 
> >> -Greg
> > Gregg,
> >
> > Thank you for your response. I was able to get rid of irqchip GPIO pipeline
> > safety and the kernel boot log looks like that:
> >
> > Starting kernel ...
> >
> > [    0.000000 ] Booting Linux on physical CPU 0x0
> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
> > Mar 1 23:27:31 MSK 2021
> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> > cr=10c53c7d
> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> > instruction cache
> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> > [    0.000000 ] Memory policy: Data cache writeback
> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> > [    0.000000 ] random: get_random_bytes called from
> > start_kernel+0x94/0x488 with crng_init=0
> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> > 130048
> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> > ip=dhcp
> > nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
> > rw
> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> > bytes)
> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> > bytes)
> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
> > rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> > cma-reserved)
> > [    0.000000 ] Virtual kernel memory layout:
> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> > latencies.
> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> > 0xffffffff, max_idle_ns: 152900835740 ns
> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
> > 171798691800ns
> > [    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> > [    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> > [    0.000628 ] Interrupt pipeline (release #10)
> > [    0.002823 ] console [rawcon-1] enabled
> > [    0.003301 ] Console: colour dummy device 80x30
> > [    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> > Inc., Ingo Molnar
> > [    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> > [    0.003542 ] ... MAX_LOCK_DEPTH:          48
> > [    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
> > [    0.003655 ] ... CLASSHASH_SIZE:          4096
> > [    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
> > [    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
> > [    0.003824 ] ... CHAINHASH_SIZE:          32768
> > [    0.003881 ]  memory used by lock dependency info: 4911 kB
> > [    0.003938 ]  per task-struct memory footprint: 2304 bytes
> > [    0.003994 ] ------------------------
> > [    0.004049 ] | Locking API testsuite:
> > [    0.004104 ]
> > ----------------------------------------------------------------------------
> > [    0.004160 ]                                  | spin |wlock |rlock
> > |mutex | wsem | rsem |
> > [    0.004217 ]
> > --------------------------------------------------------------------------
> > [    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |
> > [    0.247299 ]
> > --------------------------------------------------------------------------
> > [    0.247363 ]               recursive read-lock:             |  ok  |
> > |  ok  |
> > [    0.254944 ]            recursive read-lock #2:             |  ok  |
> > |  ok  |
> > [    0.262477 ]             mixed read-write-lock:             |  ok  |
> > |  ok  |
> > [    0.269925 ]             mixed write-read-lock:             |  ok  |
> > |  ok  |
> > [    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> > |  ok  |
> > [    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> > |  ok  |
> > [    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> > |  ok  |
> > [    0.300859 ]
> > --------------------------------------------------------------------------
> > [    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > [    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > [    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > [    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > [    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> > [    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> > [    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > [    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > [    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > [    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > [    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > [    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > [    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > [    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > [    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > [    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > [    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > [    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > [    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > [    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > [    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > [    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > [    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > [    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > [    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > [    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > [    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > [    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > [    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > [    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > [    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > [    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > [    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > [    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > [    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > [    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > [    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > [    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > [    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > [    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > [    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > [    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > [    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > [    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > [    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > [    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > [    0.827223 ]       hard-irq read-recursion/123:  ok  |
> > [    0.831229 ]       soft-irq read-recursion/123:  ok  |
> > [    0.835128 ]       hard-irq read-recursion/132:  ok  |
> > [    0.838984 ]       soft-irq read-recursion/132:  ok  |
> > [    0.843014 ]       hard-irq read-recursion/213:  ok  |
> > [    0.846887 ]       soft-irq read-recursion/213:  ok  |
> > [    0.850914 ]       hard-irq read-recursion/231:  ok  |
> > [    0.854791 ]       soft-irq read-recursion/231:  ok  |
> > [    0.858667 ]       hard-irq read-recursion/312:  ok  |
> > [    0.862678 ]       soft-irq read-recursion/312:  ok  |
> > [    0.866573 ]       hard-irq read-recursion/321:  ok  |
> > [    0.870576 ]       soft-irq read-recursion/321:  ok  |
> > [    0.874470 ]
> > --------------------------------------------------------------------------
> > [    0.874529 ]   | Wound/wait tests |
> > [    0.874584 ]   ---------------------
> > [    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
> > [    0.886282 ]                ww contexts mixing:  ok  |  ok  |
> > [    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
> > |
> > [    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
> > [    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
> > |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> > [    0.959317 ]            spinlock nest unlocked:  ok  |
> > [    0.963229 ]   -----------------------------------------------------
> > [    0.963289 ]                                  |block | try  |context|
> > [    0.963345 ]   -----------------------------------------------------
> > [    0.963402 ]                           context:  ok  |  ok  |  ok  |
> > [    0.975067 ]                               try:  ok  |  ok  |  ok  |
> > [    0.986404 ]                             block:  ok  |  ok  |  ok  |
> > [    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
> > [    1.009525 ] -------------------------------------------------------
> > [    1.009588 ] Good, all 261 testcases passed! |
> > [    1.009645 ] ---------------------------------
> > [    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> > [    1.060152 ] pid_max: default: 32768 minimum: 301
> > [    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> > [    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> > bytes)
> > [    1.067262 ] CPU: Testing write buffer coherency: ok
> > [    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
> > [    1.082517 ] devtmpfs: initialized
> > [    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
> > variant 5 rev 1
> > [    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> > 0xffffffff, max_idle_ns: 19112604462750000 ns
> > [    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> > [    1.181399 ] pinctrl core: initialized pinctrl subsystem
> > [    1.204878 ] NET: Registered protocol family 16
> > [    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
> > allocations
> > [    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
> > [    1.335018 ] No ATAGs?
> > [    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> > [    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> > [    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> > [    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
> > [    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> > [    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> > pinctrl driver
> > [    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> > 0x(ptrval)
> > [    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> > 0x(ptrval)
> > [    1.719680 ] AT91: Detected SoC family: sama5d4
> > [    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
> > [    1.724446 ] VDD MCI1: supplied by VCC 3V3
> > [    1.730458 ] SCSI subsystem initialized
> > [    1.733270 ] usbcore: registered new interface driver usbfs
> > [    1.734011 ] usbcore: registered new interface driver hub
> > [    1.734521 ] usbcore: registered new device driver usb
> > [    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> > (rx) for DMA transfers
> > [    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> > 0x502).
> > [    1.744531 ] videodev: Linux video capture interface: v2.00
> > [    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
> > [    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
> > Giometti <giometti@linux.it>
> > [    1.745276 ] PTP clock support registered
> > [    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
> > [    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
> > [    2.567438 ] NET: Registered protocol family 2
> > [    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
> > 12288 bytes)
> > [    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
> > bytes)
> > [    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> > [    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
> > [    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> > [    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> > [    2.576049 ] NET: Registered protocol family 1
> > [    2.583998 ] RPC: Registered named UNIX socket transport module.
> > [    2.584202 ] RPC: Registered udp transport module.
> > [    2.584274 ] RPC: Registered tcp transport module.
> > [    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> > [    2.595180 ] [Xenomai] scheduling class idle registered.
> > [    2.595264 ] [Xenomai] scheduling class rt registered.
> > [    2.596739 ] I-pipe: head domain Xenomai registered.
> > [    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
> > [    2.631931 ] Initialise system trusted keyrings
> > [    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> > [    2.680240 ] Key type asymmetric registered
> > [    2.680621 ] Asymmetric key parser 'x509' registered
> > [    2.681033 ] io scheduler noop registered (default)
> > [    2.681119 ] io scheduler mq-deadline registered
> > [    2.681187 ] io scheduler kyber registered
> > [    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    3.749595 ] random: fast init done
> > [    4.057967 ] console [ttyS0] enabled
> > [    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    4.136696 ] brd: module loaded
> > [    4.249170 ] loop: module loaded
> > [    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> > (rx) for DMA transfers
> > [    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> > [    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> > at 0xf8010000 (irq 24)
> > [    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> > (rx) for DMA transfers
> > [    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> > at 0xfc018000 (irq 31)
> > [    4.349989 ] libphy: Fixed MDIO Bus: probed
> > [    4.362450 ] libphy: MACB_mii_bus: probed
> > [    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> > [    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> > [    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> > [    4.530712 ] ehci-atmel: EHCI Atmel driver
> > [    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
> > [    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> > bus number 1
> > [    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> > [    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> > [    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
> > idProduct=0002, bcdDevice= 4.19
> > [    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [    4.613818 ] usb usb1: Product: EHCI Host Controller
> > [    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> > [    4.624337 ] usb usb1: SerialNumber: 600000.ehci
> > [    4.638766 ] hub 1-0:1.0: USB hub found
> > [    4.645049 ] hub 1-0:1.0: 3 ports detected
> > [    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> > [    4.666149 ] ohci-atmel: OHCI Atmel driver
> > [    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
> > [    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
> > number 2
> > [    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> > [    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
> > idProduct=0001, bcdDevice= 4.19
> > [    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [    4.784659 ] usb usb2: Product: USB Host Controller
> > [    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> > [    4.795098 ] usb usb2: SerialNumber: at91
> > [    4.805171 ] hub 2-0:1.0: USB hub found
> > [    4.811383 ] hub 2-0:1.0: 3 ports detected
> > [    4.827989 ] usbcore: registered new interface driver cdc_acm
> > [    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
> > and ISDN adapters
> > [    4.842644 ] usbcore: registered new interface driver usb-storage
> > [    4.849656 ] usbcore: registered new interface driver usbserial_generic
> > [    4.857097 ] usbserial: USB Serial support registered for generic
> > [    4.863859 ] usbcore: registered new interface driver ftdi_sio
> > [    4.870025 ] usbserial: USB Serial support registered for FTDI USB
> > Serial Device
> > [    4.877858 ] usbcore: registered new interface driver pl2303
> > [    4.883870 ] usbserial: USB Serial support registered for pl2303
> > [    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> > [    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> > 0x00400000-0x004fffff] mapped at (ptrval)
> > [    4.943428 ] g_serial gadget: Gadget Serial v2.4
> > [    4.948109 ] g_serial gadget: g_serial ready
> > [    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
> > [    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> > [    4.976514 ] i2c /dev entries driver
> > [    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
> > [    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> > sec, nowayout = 0)
> > [    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
> > [    5.041289 ] sdhci: Copyright(c) Pierre Ossman
> > [    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
> > [    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> > [    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> > [    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> > [    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> > irq 28, 1 slots
> > [    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
> > [    5.132517 ] atmel_aes fc044000.aes: version: 0x201
> > [    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> > dma1chan1 for DMA transfers
> > [    5.172334 ] atmel_sha fc050000.sha: version: 0x420
> > [    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> > [    5.193368 ] atmel_sha fc050000.sha: Atmel
> > SHA1/SHA256/SHA224/SHA384/SHA512
> > [    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
> > [    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> > DMA transfers
> > [    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> > [    5.243183 ] usbcore: registered new interface driver usbhid
> > [    5.248897 ] usbhid: USB HID core driver
> > [    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> > [    5.279605 ] nand: Micron MT29F4G08ABAEAWP
> > [    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> > OOB size: 224
> > [    5.298878 ] Bad block table not found for chip 0
> > [    5.306500 ] Bad block table not found for chip 0
> > [    5.311258 ] Scanning device for bad blocks
> > [    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
> > [    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
> > [    5.802851 ] 6 fixed-partitions partitions found on MTD device
> > atmel_nand
> > [    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
> > [    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> > [    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
> > [    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> > [    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
> > [    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
> > [    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
> > [    6.039378 ] NET: Registered protocol family 10
> > [    6.060590 ] Segment Routing with IPv6
> > [    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> > [    6.075969 ] NET: Registered protocol family 17
> > [    6.093926 ] Loading compiled-in X.509 certificates
> > [    6.205946 ] input: gpio_keys as
> > /devices/platform/gpio_keys/input/input0
> > [    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
> > 02:15:53 UTC (1325384153)
> > [    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> > [   16.268525 ] Waiting up to 110 more seconds for network.
> > [   26.288522 ] Waiting up to 100 more seconds for network.
> >
> > It has not helped though, the result is still the same:
> >  - no ethernet cable attached - the kernel is alive
> >  - ethernet cable attached - the kernel hangs without any panic/error
> >    message
> >
> > So it it looks like that:
> > - system reset without Ethernet cable attached
> > - the kernel has been loaded from the NAND -> boot is going on
> > - on-board heartbeat LED is blinking periodically
> > - board is awaiting for ethernet link
> > - insert an Ethernet cable -> system freezed
> >
> > Maybe there are additional debug options that I can use to figure out what
> > is going on?
> >
> > Best regards,
> > Vladimir Petrigo
> 
> 
> Please provide the output of /proc/interrupts on this platform running
> the same kernel with CONFIG_IPIPE disabled. We need to figure out which
> IRQ chips may be active there. Thanks,
> 
> -- 
> Philippe.
There is the output:

# uname -a
Linux buildroot 4.19.144 #1 Sat Feb 27 22:19:12 MSK 2021 armv7l GNU/Linux
# cat /proc/interrupts 
           CPU0       
 16:         10  atmel-aic5   3 Level     at91_tick
 17:          0  atmel-aic5  47 Level     atmel_usba_udc
 18:          1  atmel-aic5  46 Level     ehci_hcd:usb1, ohci_hcd:usb2
 20:       2138  atmel-aic5  50 Level     at_xdmac
 21:          0  atmel-aic5   8 Level     at_xdmac
 22:          1  atmel-aic5   1 Level     at91_rtc
 24:          7  atmel-aic5  37 Level     f8010000.spi
 25:          0  atmel-aic5  32 Level     f8014000.i2c
 26:        726  atmel-aic5  40 Level     tc_clkevt
 27:       2544  atmel-aic5  54 Level     eth0
 28:          0  atmel-aic5  36 Level     fc000000.mmc
 29:        224  atmel-aic5  30 Level     fc00c000.serial
 31:          0  atmel-aic5  38 Level     fc018000.spi
 36:          0  atmel-aic5  12 Level     atmel-aes
 37:          0  atmel-aic5  14 Level     atmel-tdes
 38:          0  atmel-aic5  15 Level     atmel-sha
 39:         22  atmel-aic5  22 Level     nfc
 46:          3      GPIO   1 Level     f8020000.ethernet-ffffffff:01
 47:          0      GPIO  31 Edge      atmel_usba_udc
 48:          1      GPIO   3 Edge      mmc-detect
 57:          1      GPIO   8 Edge      pb_user1
Err:          0

I can add debug output to track down what interrupt causing freeze with
I-pipe enabled. If you may provide an example what places should be covered
with printing, that will be appreciated.

Best regards,
Vladimir Petrigo


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-01 20:45   ` Vladimir Petrigo
  2021-03-02  6:21     ` Greg Gallagher
@ 2021-03-02  9:37     ` Philippe Gerum
  2021-03-03  0:33       ` Vladimir Petrigo
  1 sibling, 1 reply; 9+ messages in thread
From: Philippe Gerum @ 2021-03-02  9:37 UTC (permalink / raw)
  To: Vladimir Petrigo; +Cc: Greg Gallagher, xenomai


Vladimir Petrigo via Xenomai <xenomai@xenomai.org> writes:

> On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
>> On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
>> xenomai@xenomai.org> wrote:
>> 
>> >
>> > Hello,
>> >
>> > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
>> > ATSAMA5D4 Xplained board.
>> >
>> > Preliminary:
>> > - non-patched Linux kernel 4.19.144 works just fine
>> > - I-pipe patched kernel can successfully boot
>> > - when I insert an ethernet cable into the on-board ethernet port, the
>> >   kernel freezes and the reset is the only solution to get out of that
>> >   state. Without the ethernet cable inserted the kernel will work
>> >   indefinitely long trying to reach the network and obtain an IP address.
>> >   So I assume something may be wrong with Micrel KSZ8081 driver under
>> >   Xenomai
>> >
>> > Here is the boot log:
>> >
>> > [    0.000000 ] Booting Linux on physical CPU 0x0
>> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
>> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
>> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
>> > Feb 28 07:27:15 MSK 2021
>> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
>> > cr=10c53c7d
>> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
>> > instruction cache
>> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
>> > [    0.000000 ] Memory policy: Data cache writeback
>> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
>> > [    0.000000 ] random: get_random_bytes called from
>> > start_kernel+0x94/0x488 with crng_init=0
>> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
>> > 130048
>> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
>> > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
>> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
>> > bytes)
>> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
>> > bytes)
>> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
>> > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
>> > cma-reserved)
>> > [    0.000000 ] Virtual kernel memory layout:
>> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
>> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
>> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
>> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
>> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
>> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
>> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
>> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
>> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
>> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
>> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
>> > latencies.
>> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
>> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
>> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
>> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
>> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
>> > 0xffffffff, max_idle_ns: 152900835740 ns
>> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
>> > every 171798691800ns
>> > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
>> > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
>> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
>> > [    0.000627 ] Interrupt pipeline (release #10)
>> > [    0.002773 ] console [rawcon-1] enabled
>> > [    0.003252 ] Console: colour dummy device 80x30
>> > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
>> > Inc., Ingo Molnar
>> > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
>> > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
>> > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
>> > [    0.003599 ] ... CLASSHASH_SIZE:          4096
>> > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
>> > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
>> > [    0.003762 ] ... CHAINHASH_SIZE:          32768
>> > [    0.003818 ]  memory used by lock dependency info: 4911 kB
>> > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
>> > [    0.003928 ] ------------------------
>> > [    0.003981 ] | Locking API testsuite:
>> > [    0.004036 ]
>> > ----------------------------------------------------------------------------
>> > [    0.004092 ]                                  | spin |wlock |rlock
>> > |mutex | wsem | rsem |
>> > [    0.004146 ]
>> >  --------------------------------------------------------------------------
>> > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |
>> > [    0.247217 ]
>> >  --------------------------------------------------------------------------
>> > [    0.247280 ]               recursive read-lock:             |  ok  |
>> >          |  ok  |
>> > [    0.254871 ]            recursive read-lock #2:             |  ok  |
>> >          |  ok  |
>> > [    0.262417 ]             mixed read-write-lock:             |  ok  |
>> >          |  ok  |
>> > [    0.269870 ]             mixed write-read-lock:             |  ok  |
>> >          |  ok  |
>> > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
>> >          |  ok  |
>> > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
>> >          |  ok  |
>> > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
>> >          |  ok  |
>> > [    0.300789 ]
>> >  --------------------------------------------------------------------------
>> > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
>> > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
>> > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
>> > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
>> > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
>> > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
>> > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
>> > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
>> > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
>> > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
>> > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
>> > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
>> > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
>> > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
>> > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
>> > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
>> > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
>> > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
>> > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
>> > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
>> > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
>> > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
>> > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
>> > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
>> > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
>> > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
>> > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
>> > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
>> > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
>> > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
>> > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
>> > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
>> > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
>> > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
>> > [    0.874467 ]
>> >  --------------------------------------------------------------------------
>> > [    0.874526 ]   | Wound/wait tests |
>> > [    0.874581 ]   ---------------------
>> > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
>> > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
>> > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
>> > ok  |
>> > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
>> > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
>> > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
>> > [    0.959308 ]            spinlock nest unlocked:  ok  |
>> > [    0.963226 ]   -----------------------------------------------------
>> > [    0.963284 ]                                  |block | try  |context|
>> > [    0.963340 ]   -----------------------------------------------------
>> > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
>> > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
>> > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
>> > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
>> > [    1.009546 ] -------------------------------------------------------
>> > [    1.009607 ] Good, all 261 testcases passed! |
>> > [    1.009661 ] ---------------------------------
>> > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
>> > [    1.060146 ] pid_max: default: 32768 minimum: 301
>> > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
>> > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
>> > bytes)
>> > [    1.067206 ] CPU: Testing write buffer coherency: ok
>> > [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
>> > [    1.082477 ] devtmpfs: initialized
>> > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
>> > variant 5 rev 1
>> > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
>> > 0xffffffff, max_idle_ns: 19112604462750000 ns
>> > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
>> > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
>> > [    1.206526 ] NET: Registered protocol family 16
>> > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
>> > allocations
>> > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
>> > [    1.333809 ] No ATAGs?
>> > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
>> > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
>> > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
>> > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
>> > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
>> > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
>> > pinctrl driver
>> > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
>> > 0x(ptrval)
>> > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
>> > 0x(ptrval)
>> > [    1.721621 ] AT91: Detected SoC family: sama5d4
>> > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
>> > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
>> > [    1.732481 ] SCSI subsystem initialized
>> > [    1.735296 ] usbcore: registered new interface driver usbfs
>> > [    1.736049 ] usbcore: registered new interface driver hub
>> > [    1.736561 ] usbcore: registered new device driver usb
>> > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
>> > (rx) for DMA transfers
>> > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
>> > 0x502).
>> > [    1.746533 ] videodev: Linux video capture interface: v2.00
>> > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
>> > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
>> > Rodolfo Giometti <giometti@linux.it>
>> > [    1.747288 ] PTP clock support registered
>> > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
>> > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
>> > [    2.574436 ] NET: Registered protocol family 2
>> > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
>> > 1, 12288 bytes)
>> > [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
>> > bytes)
>> > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
>> > [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
>> > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
>> > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
>> > [    2.583098 ] NET: Registered protocol family 1
>> > [    2.591094 ] RPC: Registered named UNIX socket transport module.
>> > [    2.591298 ] RPC: Registered udp transport module.
>> > [    2.591371 ] RPC: Registered tcp transport module.
>> > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
>> > [    2.602326 ] [Xenomai] scheduling class idle registered.
>> > [    2.602406 ] [Xenomai] scheduling class rt registered.
>> > [    2.603891 ] I-pipe: head domain Xenomai registered.
>> > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
>> > [    2.638984 ] Initialise system trusted keyrings
>> > [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
>> > [    2.687431 ] Key type asymmetric registered
>> > [    2.687813 ] Asymmetric key parser 'x509' registered
>> > [    2.688226 ] io scheduler noop registered (default)
>> > [    2.688308 ] io scheduler mq-deadline registered
>> > [    2.688376 ] io scheduler kyber registered
>> > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    3.756264 ] random: fast init done
>> > [    4.064725 ] console [ttyS0] enabled
>> > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
>> > base_baud = 6250000) is a ATMEL_SERIAL
>> > [    4.143473 ] brd: module loaded
>> > [    4.256253 ] loop: module loaded
>> > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
>> > (rx) for DMA transfers
>> > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
>> > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
>> > at 0xf8010000 (irq 24)
>> > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
>> > (rx) for DMA transfers
>> > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
>> > at 0xfc018000 (irq 31)
>> > [    4.356675 ] libphy: Fixed MDIO Bus: probed
>> > [    4.369182 ] libphy: MACB_mii_bus: probed
>> > [    4.399395 ] ------------[ cut here  ]------------
>> > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
>> > irq_set_chip+0xbc/0xcc
>> > [    4.411649 ] irqchip GPIO is not pipeline-safe!
>> > [    4.411660 ] Modules linked in:
>> > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
>> > [    4.424953 ] Hardware name: Atmel SAMA5
>> > [    4.428667 ] I-pipe domain: Linux
>> > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
>> > (show_stack+0x10/0x14)
>> > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
>> > (__warn+0xf4/0x10c)
>> > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
>> > (warn_slowpath_fmt+0x48/0x6c)
>> > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
>> > (irq_set_chip+0xbc/0xcc)
>> > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
>> > (irq_set_chip_and_handler_name+0x14/0x2c)
>> > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
>> > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
>> > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
>> > (irq_domain_associate+0x74/0x1ec)
>> > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
>> > (irq_create_mapping+0x64/0xc8)
>> > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
>> > (irq_create_fwspec_mapping+0x184/0x2c4)
>> > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
>> > (irq_create_of_mapping+0x5c/0x78)
>> > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
>> > (of_irq_get+0x6c/0xb8)
>> > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
>> > (of_mdiobus_register_phy+0x84/0x17c)
>> > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
>> > (of_mdiobus_register+0xf4/0x304)
>> > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
>> > (macb_probe+0x72c/0xad0)
>> > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
>> > (platform_drv_probe+0x48/0x98)
>> > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
>> > (really_probe+0x1d8/0x2c0)
>> > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
>> > (driver_probe_device+0x60/0x160)
>> > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
>> > (__driver_attach+0xe8/0xec)
>> > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
>> > (bus_for_each_dev+0x74/0xb4)
>> > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
>> > (bus_add_driver+0x18c/0x210)
>> > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
>> > (driver_register+0x7c/0x114)
>> > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
>> > (do_one_initcall+0x88/0x22c)
>> > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
>> > (kernel_init_freeable+0x26c/0x304)
>> > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
>> > (kernel_init+0x8/0x108)
>> > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
>> > (ret_from_fork+0x18/0x24)
>> > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
>> > [    4.644852 ] dfa0:                                     00000000
>> > 00000000 00000000 00000000
>> > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
>> > 00000000 00000000 00000000
>> > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
>> > [    4.667652 ] irq event stamp: 145160
>> > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
>> > _raw_spin_unlock_irqrestore+0x30/0x58
>> > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
>> > _raw_spin_lock_irqsave+0x1c/0x98
>> > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
>> > __do_softirq+0x2a4/0x420
>> > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
>> > irq_exit+0x1a4/0x1a8
>> > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
>> > [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
>> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
>> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
>> > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
>> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
>> > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>> > [    4.852778 ] ehci-atmel: EHCI Atmel driver
>> > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
>> > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
>> > bus number 1
>> > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
>> > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
>> > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
>> > idProduct=0002, bcdDevice= 4.19
>> > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
>> > SerialNumber=1
>> > [    4.935857 ] usb usb1: Product: EHCI Host Controller
>> > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
>> > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
>> > [    4.960887 ] hub 1-0:1.0: USB hub found
>> > [    4.967182 ] hub 1-0:1.0: 3 ports detected
>> > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>> > [    4.988376 ] ohci-atmel: OHCI Atmel driver
>> > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
>> > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
>> > bus number 2
>> > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
>> > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
>> > idProduct=0001, bcdDevice= 4.19
>> > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
>> > SerialNumber=1
>> > [    5.106711 ] usb usb2: Product: USB Host Controller
>> > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
>> > [    5.117146 ] usb usb2: SerialNumber: at91
>> > [    5.127252 ] hub 2-0:1.0: USB hub found
>> > [    5.133470 ] hub 2-0:1.0: 3 ports detected
>> > [    5.150121 ] usbcore: registered new interface driver cdc_acm
>> > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
>> > and ISDN adapters
>> > [    5.164776 ] usbcore: registered new interface driver usb-storage
>> > [    5.171788 ] usbcore: registered new interface driver usbserial_generic
>> > [    5.179229 ] usbserial: USB Serial support registered for generic
>> > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
>> > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
>> > Serial Device
>> > [    5.199977 ] usbcore: registered new interface driver pl2303
>> > [    5.205993 ] usbserial: USB Serial support registered for pl2303
>> > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
>> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
>> > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
>> > 0x00400000-0x004fffff] mapped at (ptrval)
>> > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
>> > [    5.270268 ] g_serial gadget: g_serial ready
>> > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
>> > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
>> > [    5.298694 ] i2c /dev entries driver
>> > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
>> > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
>> > sec, nowayout = 0)
>> > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
>> > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
>> > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
>> > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
>> > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
>> > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
>> > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
>> > irq 28, 1 slots
>> > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
>> > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
>> > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
>> > dma1chan1 for DMA transfers
>> > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
>> > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
>> > [    5.516378 ] atmel_sha fc050000.sha: Atmel
>> > SHA1/SHA256/SHA224/SHA384/SHA512
>> > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
>> > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
>> > DMA transfers
>> > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
>> > [    5.566514 ] usbcore: registered new interface driver usbhid
>> > [    5.572227 ] usbhid: USB HID core driver
>> > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
>> > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
>> > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
>> > OOB size: 224
>> > [    5.622318 ] Bad block table not found for chip 0
>> > [    5.629946 ] Bad block table not found for chip 0
>> > [    5.634709 ] Scanning device for bad blocks
>> > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
>> > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
>> > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
>> > atmel_nand
>> > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
>> > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
>> > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
>> > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
>> > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
>> > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
>> > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
>> > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
>> > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
>> > [    6.396804 ] NET: Registered protocol family 10
>> > [    6.418370 ] Segment Routing with IPv6
>> > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
>> > [    6.434188 ] NET: Registered protocol family 17
>> > [    6.452130 ] Loading compiled-in X.509 certificates
>> > [    6.565366 ] input: gpio_keys as
>> > /devices/platform/gpio_keys/input/input0
>> > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
>> > 07:59:53 UTC (1325491193)
>> > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
>> > [   16.620548 ] Waiting up to 110 more seconds for network.
>> >
>> > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
>> > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
>> > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
>> > same family.
>> >
>> > Any suggestions on how to narrow the root case of that freeze will be
>> > greatly appreciated.
>> >
>> > Best regards,
>> > Vladimir Petrigo
>> >
>> > The back trace in the log means that this chip hasn't been fully ported to
>> the ipipe kernel and is missing the flag to identify the gpiochip as
>> pipeline safe.   It is possible the ipipe kernel hasn't been ported
>> properly to this target.  Check the gpio driver and irq chip driver and the
>> timer driver to see if they have any ipipe related code.  It's possible
>> this target was supported by older ipipe versions but wasn't fully ported
>> to a recent version of the ipipe.  I'll check tonight when I get a chance
>> to confirm if this target has support.
>> 
>> -Greg
> Gregg,
>
> Thank you for your response. I was able to get rid of irqchip GPIO pipeline
> safety and the kernel boot log looks like that:
>
> Starting kernel ...
>
> [    0.000000 ] Booting Linux on physical CPU 0x0
> [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
> Mar 1 23:27:31 MSK 2021
> [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> cr=10c53c7d
> [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> [    0.000000 ] Memory policy: Data cache writeback
> [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> [    0.000000 ] random: get_random_bytes called from
> start_kernel+0x94/0x488 with crng_init=0
> [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> 130048
> [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> ip=dhcp
> nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
> rw
> [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> bytes)
> [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> bytes)
> [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
> rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> cma-reserved)
> [    0.000000 ] Virtual kernel memory layout:
> [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
> [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> latencies.
> [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 152900835740 ns
> [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
> 171798691800ns
> [    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> [    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> [    0.000628 ] Interrupt pipeline (release #10)
> [    0.002823 ] console [rawcon-1] enabled
> [    0.003301 ] Console: colour dummy device 80x30
> [    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> Inc., Ingo Molnar
> [    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> [    0.003542 ] ... MAX_LOCK_DEPTH:          48
> [    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
> [    0.003655 ] ... CLASSHASH_SIZE:          4096
> [    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
> [    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
> [    0.003824 ] ... CHAINHASH_SIZE:          32768
> [    0.003881 ]  memory used by lock dependency info: 4911 kB
> [    0.003938 ]  per task-struct memory footprint: 2304 bytes
> [    0.003994 ] ------------------------
> [    0.004049 ] | Locking API testsuite:
> [    0.004104 ]
> ----------------------------------------------------------------------------
> [    0.004160 ]                                  | spin |wlock |rlock
> |mutex | wsem | rsem |
> [    0.004217 ]
> --------------------------------------------------------------------------
> [    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.247299 ]
> --------------------------------------------------------------------------
> [    0.247363 ]               recursive read-lock:             |  ok  |
> |  ok  |
> [    0.254944 ]            recursive read-lock #2:             |  ok  |
> |  ok  |
> [    0.262477 ]             mixed read-write-lock:             |  ok  |
> |  ok  |
> [    0.269925 ]             mixed write-read-lock:             |  ok  |
> |  ok  |
> [    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> |  ok  |
> [    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> |  ok  |
> [    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> |  ok  |
> [    0.300859 ]
> --------------------------------------------------------------------------
> [    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> [    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> [    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.827223 ]       hard-irq read-recursion/123:  ok  |
> [    0.831229 ]       soft-irq read-recursion/123:  ok  |
> [    0.835128 ]       hard-irq read-recursion/132:  ok  |
> [    0.838984 ]       soft-irq read-recursion/132:  ok  |
> [    0.843014 ]       hard-irq read-recursion/213:  ok  |
> [    0.846887 ]       soft-irq read-recursion/213:  ok  |
> [    0.850914 ]       hard-irq read-recursion/231:  ok  |
> [    0.854791 ]       soft-irq read-recursion/231:  ok  |
> [    0.858667 ]       hard-irq read-recursion/312:  ok  |
> [    0.862678 ]       soft-irq read-recursion/312:  ok  |
> [    0.866573 ]       hard-irq read-recursion/321:  ok  |
> [    0.870576 ]       soft-irq read-recursion/321:  ok  |
> [    0.874470 ]
> --------------------------------------------------------------------------
> [    0.874529 ]   | Wound/wait tests |
> [    0.874584 ]   ---------------------
> [    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
> [    0.886282 ]                ww contexts mixing:  ok  |  ok  |
> [    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
> |
> [    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
> [    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> [    0.959317 ]            spinlock nest unlocked:  ok  |
> [    0.963229 ]   -----------------------------------------------------
> [    0.963289 ]                                  |block | try  |context|
> [    0.963345 ]   -----------------------------------------------------
> [    0.963402 ]                           context:  ok  |  ok  |  ok  |
> [    0.975067 ]                               try:  ok  |  ok  |  ok  |
> [    0.986404 ]                             block:  ok  |  ok  |  ok  |
> [    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
> [    1.009525 ] -------------------------------------------------------
> [    1.009588 ] Good, all 261 testcases passed! |
> [    1.009645 ] ---------------------------------
> [    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> [    1.060152 ] pid_max: default: 32768 minimum: 301
> [    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> [    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> bytes)
> [    1.067262 ] CPU: Testing write buffer coherency: ok
> [    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
> [    1.082517 ] devtmpfs: initialized
> [    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
> variant 5 rev 1
> [    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> [    1.181399 ] pinctrl core: initialized pinctrl subsystem
> [    1.204878 ] NET: Registered protocol family 16
> [    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
> allocations
> [    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
> [    1.335018 ] No ATAGs?
> [    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> [    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> [    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> [    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
> [    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> [    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> pinctrl driver
> [    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.719680 ] AT91: Detected SoC family: sama5d4
> [    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
> [    1.724446 ] VDD MCI1: supplied by VCC 3V3
> [    1.730458 ] SCSI subsystem initialized
> [    1.733270 ] usbcore: registered new interface driver usbfs
> [    1.734011 ] usbcore: registered new interface driver hub
> [    1.734521 ] usbcore: registered new device driver usb
> [    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> (rx) for DMA transfers
> [    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> 0x502).
> [    1.744531 ] videodev: Linux video capture interface: v2.00
> [    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
> [    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
> Giometti <giometti@linux.it>
> [    1.745276 ] PTP clock support registered
> [    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
> [    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
> [    2.567438 ] NET: Registered protocol family 2
> [    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
> 12288 bytes)
> [    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
> bytes)
> [    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> [    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
> [    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> [    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> [    2.576049 ] NET: Registered protocol family 1
> [    2.583998 ] RPC: Registered named UNIX socket transport module.
> [    2.584202 ] RPC: Registered udp transport module.
> [    2.584274 ] RPC: Registered tcp transport module.
> [    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [    2.595180 ] [Xenomai] scheduling class idle registered.
> [    2.595264 ] [Xenomai] scheduling class rt registered.
> [    2.596739 ] I-pipe: head domain Xenomai registered.
> [    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
> [    2.631931 ] Initialise system trusted keyrings
> [    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> [    2.680240 ] Key type asymmetric registered
> [    2.680621 ] Asymmetric key parser 'x509' registered
> [    2.681033 ] io scheduler noop registered (default)
> [    2.681119 ] io scheduler mq-deadline registered
> [    2.681187 ] io scheduler kyber registered
> [    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    3.749595 ] random: fast init done
> [    4.057967 ] console [ttyS0] enabled
> [    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    4.136696 ] brd: module loaded
> [    4.249170 ] loop: module loaded
> [    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> (rx) for DMA transfers
> [    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> [    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> at 0xf8010000 (irq 24)
> [    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> (rx) for DMA transfers
> [    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> at 0xfc018000 (irq 31)
> [    4.349989 ] libphy: Fixed MDIO Bus: probed
> [    4.362450 ] libphy: MACB_mii_bus: probed
> [    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> attached PHY driver [Micrel KSZ8081 or KSZ8091]
> (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> [    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> [    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    4.530712 ] ehci-atmel: EHCI Atmel driver
> [    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
> [    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> bus number 1
> [    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> [    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> [    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
> idProduct=0002, bcdDevice= 4.19
> [    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    4.613818 ] usb usb1: Product: EHCI Host Controller
> [    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> [    4.624337 ] usb usb1: SerialNumber: 600000.ehci
> [    4.638766 ] hub 1-0:1.0: USB hub found
> [    4.645049 ] hub 1-0:1.0: 3 ports detected
> [    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [    4.666149 ] ohci-atmel: OHCI Atmel driver
> [    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
> [    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
> number 2
> [    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> [    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
> idProduct=0001, bcdDevice= 4.19
> [    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    4.784659 ] usb usb2: Product: USB Host Controller
> [    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> [    4.795098 ] usb usb2: SerialNumber: at91
> [    4.805171 ] hub 2-0:1.0: USB hub found
> [    4.811383 ] hub 2-0:1.0: 3 ports detected
> [    4.827989 ] usbcore: registered new interface driver cdc_acm
> [    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
> and ISDN adapters
> [    4.842644 ] usbcore: registered new interface driver usb-storage
> [    4.849656 ] usbcore: registered new interface driver usbserial_generic
> [    4.857097 ] usbserial: USB Serial support registered for generic
> [    4.863859 ] usbcore: registered new interface driver ftdi_sio
> [    4.870025 ] usbserial: USB Serial support registered for FTDI USB
> Serial Device
> [    4.877858 ] usbcore: registered new interface driver pl2303
> [    4.883870 ] usbserial: USB Serial support registered for pl2303
> [    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> [    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> 0x00400000-0x004fffff] mapped at (ptrval)
> [    4.943428 ] g_serial gadget: Gadget Serial v2.4
> [    4.948109 ] g_serial gadget: g_serial ready
> [    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
> [    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> [    4.976514 ] i2c /dev entries driver
> [    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
> [    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> sec, nowayout = 0)
> [    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
> [    5.041289 ] sdhci: Copyright(c) Pierre Ossman
> [    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
> [    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> [    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> [    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> [    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> irq 28, 1 slots
> [    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
> [    5.132517 ] atmel_aes fc044000.aes: version: 0x201
> [    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> dma1chan1 for DMA transfers
> [    5.172334 ] atmel_sha fc050000.sha: version: 0x420
> [    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> [    5.193368 ] atmel_sha fc050000.sha: Atmel
> SHA1/SHA256/SHA224/SHA384/SHA512
> [    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
> [    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> DMA transfers
> [    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> [    5.243183 ] usbcore: registered new interface driver usbhid
> [    5.248897 ] usbhid: USB HID core driver
> [    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> [    5.279605 ] nand: Micron MT29F4G08ABAEAWP
> [    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> OOB size: 224
> [    5.298878 ] Bad block table not found for chip 0
> [    5.306500 ] Bad block table not found for chip 0
> [    5.311258 ] Scanning device for bad blocks
> [    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
> [    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
> [    5.802851 ] 6 fixed-partitions partitions found on MTD device
> atmel_nand
> [    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
> [    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> [    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
> [    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> [    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
> [    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
> [    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
> [    6.039378 ] NET: Registered protocol family 10
> [    6.060590 ] Segment Routing with IPv6
> [    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [    6.075969 ] NET: Registered protocol family 17
> [    6.093926 ] Loading compiled-in X.509 certificates
> [    6.205946 ] input: gpio_keys as
> /devices/platform/gpio_keys/input/input0
> [    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
> 02:15:53 UTC (1325384153)
> [    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [   16.268525 ] Waiting up to 110 more seconds for network.
> [   26.288522 ] Waiting up to 100 more seconds for network.
>
> It has not helped though, the result is still the same:
>  - no ethernet cable attached - the kernel is alive
>  - ethernet cable attached - the kernel hangs without any panic/error
>    message
>
> So it it looks like that:
> - system reset without Ethernet cable attached
> - the kernel has been loaded from the NAND -> boot is going on
> - on-board heartbeat LED is blinking periodically
> - board is awaiting for ethernet link
> - insert an Ethernet cable -> system freezed
>
> Maybe there are additional debug options that I can use to figure out what
> is going on?
>
> Best regards,
> Vladimir Petrigo


Please provide the output of /proc/interrupts on this platform running
the same kernel with CONFIG_IPIPE disabled. We need to figure out which
IRQ chips may be active there. Thanks,

-- 
Philippe.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-01 20:45   ` Vladimir Petrigo
@ 2021-03-02  6:21     ` Greg Gallagher
  2021-03-02  9:37     ` Philippe Gerum
  1 sibling, 0 replies; 9+ messages in thread
From: Greg Gallagher @ 2021-03-02  6:21 UTC (permalink / raw)
  To: Vladimir Petrigo; +Cc: Xenomai@xenomai.org

On Mon, Mar 1, 2021 at 3:45 PM Vladimir Petrigo <vladimir.petrigo@gmail.com>
wrote:

> On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
> > On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
> > xenomai@xenomai.org> wrote:
> >
> > >
> > > Hello,
> > >
> > > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
> > > ATSAMA5D4 Xplained board.
> > >
> > > Preliminary:
> > > - non-patched Linux kernel 4.19.144 works just fine
> > > - I-pipe patched kernel can successfully boot
> > > - when I insert an ethernet cable into the on-board ethernet port, the
> > >   kernel freezes and the reset is the only solution to get out of that
> > >   state. Without the ethernet cable inserted the kernel will work
> > >   indefinitely long trying to reach the network and obtain an IP
> address.
> > >   So I assume something may be wrong with Micrel KSZ8081 driver under
> > >   Xenomai
> > >
> > > Here is the boot log:
> > >
> > > [    0.000000 ] Booting Linux on physical CPU 0x0
> > > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain
> )
> > > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> > > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6
> Sun
> > > Feb 28 07:27:15 MSK 2021
> > > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> > > cr=10c53c7d
> > > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> > > instruction cache
> > > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> > > [    0.000000 ] Memory policy: Data cache writeback
> > > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> > > [    0.000000 ] random: get_random_bytes called from
> > > start_kernel+0x94/0x488 with crng_init=0
> > > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> > > 130048
> > > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> > > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
> > > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6,
> 262144
> > > bytes)
> > > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> > > bytes)
> > > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
> > > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> > > cma-reserved)
> > > [    0.000000 ] Virtual kernel memory layout:
> > > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> > > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> > > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> > > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> > > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> > > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> > > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> > > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
> > > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> > > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> > > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing
> WA.
> > > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> > > latencies.
> > > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> > > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode
> enabled
> > > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> > > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> > > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff
> max_cycles:
> > > 0xffffffff, max_idle_ns: 152900835740 ns
> > > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
> > > every 171798691800ns
> > > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> > > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> > > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> > > [    0.000627 ] Interrupt pipeline (release #10)
> > > [    0.002773 ] console [rawcon-1] enabled
> > > [    0.003252 ] Console: colour dummy device 80x30
> > > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> > > Inc., Ingo Molnar
> > > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> > > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
> > > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
> > > [    0.003599 ] ... CLASSHASH_SIZE:          4096
> > > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
> > > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
> > > [    0.003762 ] ... CHAINHASH_SIZE:          32768
> > > [    0.003818 ]  memory used by lock dependency info: 4911 kB
> > > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
> > > [    0.003928 ] ------------------------
> > > [    0.003981 ] | Locking API testsuite:
> > > [    0.004036 ]
> > >
> ----------------------------------------------------------------------------
> > > [    0.004092 ]                                  | spin |wlock |rlock
> > > |mutex | wsem | rsem |
> > > [    0.004146 ]
> > >
> --------------------------------------------------------------------------
> > > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |
> > > [    0.247217 ]
> > >
> --------------------------------------------------------------------------
> > > [    0.247280 ]               recursive read-lock:             |  ok  |
> > >          |  ok  |
> > > [    0.254871 ]            recursive read-lock #2:             |  ok  |
> > >          |  ok  |
> > > [    0.262417 ]             mixed read-write-lock:             |  ok  |
> > >          |  ok  |
> > > [    0.269870 ]             mixed write-read-lock:             |  ok  |
> > >          |  ok  |
> > > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> > >          |  ok  |
> > > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> > >          |  ok  |
> > > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> > >          |  ok  |
> > > [    0.300789 ]
> > >
> --------------------------------------------------------------------------
> > > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> > > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> > > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
> > > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
> > > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
> > > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
> > > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
> > > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
> > > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
> > > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
> > > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
> > > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
> > > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
> > > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
> > > [    0.874467 ]
> > >
> --------------------------------------------------------------------------
> > > [    0.874526 ]   | Wound/wait tests |
> > > [    0.874581 ]   ---------------------
> > > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
> > > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
> > > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
> > > ok  |
> > > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
> > > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
> > > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> > > [    0.959308 ]            spinlock nest unlocked:  ok  |
> > > [    0.963226 ]   -----------------------------------------------------
> > > [    0.963284 ]                                  |block | try
> |context|
> > > [    0.963340 ]   -----------------------------------------------------
> > > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
> > > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
> > > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
> > > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
> > > [    1.009546 ] -------------------------------------------------------
> > > [    1.009607 ] Good, all 261 testcases passed! |
> > > [    1.009661 ] ---------------------------------
> > > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> > > [    1.060146 ] pid_max: default: 32768 minimum: 301
> > > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096
> bytes)
> > > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0,
> 4096
> > > bytes)
> > > [    1.067206 ] CPU: Testing write buffer coherency: ok
> > > [    1.073824 ] Setting up static identity map for 0x20100000 -
> 0x20100060
> > > [    1.082477 ] devtmpfs: initialized
> > > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
> > > variant 5 rev 1
> > > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> > > 0xffffffff, max_idle_ns: 19112604462750000 ns
> > > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> > > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
> > > [    1.206526 ] NET: Registered protocol family 16
> > > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
> > > allocations
> > > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
> > > [    1.333809 ] No ATAGs?
> > > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> > > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> > > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> > > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
> > > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> > > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized
> AT91
> > > pinctrl driver
> > > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped
> at
> > > 0x(ptrval)
> > > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped
> at
> > > 0x(ptrval)
> > > [    1.721621 ] AT91: Detected SoC family: sama5d4
> > > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
> > > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
> > > [    1.732481 ] SCSI subsystem initialized
> > > [    1.735296 ] usbcore: registered new interface driver usbfs
> > > [    1.736049 ] usbcore: registered new interface driver hub
> > > [    1.736561 ] usbcore: registered new device driver usb
> > > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and
> dma0chan1
> > > (rx) for DMA transfers
> > > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> > > 0x502).
> > > [    1.746533 ] videodev: Linux video capture interface: v2.00
> > > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
> > > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
> > > Rodolfo Giometti <giometti@linux.it>
> > > [    1.747288 ] PTP clock support registered
> > > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
> > > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
> > > [    2.574436 ] NET: Registered protocol family 2
> > > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256
> (order:
> > > 1, 12288 bytes)
> > > [    2.578494 ] TCP established hash table entries: 4096 (order: 2,
> 16384
> > > bytes)
> > > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224
> bytes)
> > > [    2.580220 ] TCP: Hash tables configured (established 4096 bind
> 4096)
> > > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> > > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576
> bytes)
> > > [    2.583098 ] NET: Registered protocol family 1
> > > [    2.591094 ] RPC: Registered named UNIX socket transport module.
> > > [    2.591298 ] RPC: Registered udp transport module.
> > > [    2.591371 ] RPC: Registered tcp transport module.
> > > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport
> module.
> > > [    2.602326 ] [Xenomai] scheduling class idle registered.
> > > [    2.602406 ] [Xenomai] scheduling class rt registered.
> > > [    2.603891 ] I-pipe: head domain Xenomai registered.
> > > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
> > > [    2.638984 ] Initialise system trusted keyrings
> > > [    2.641641 ] workingset: timestamp_bits=30 max_order=17
> bucket_order=0
> > > [    2.687431 ] Key type asymmetric registered
> > > [    2.687813 ] Asymmetric key parser 'x509' registered
> > > [    2.688226 ] io scheduler noop registered (default)
> > > [    2.688308 ] io scheduler mq-deadline registered
> > > [    2.688376 ] io scheduler kyber registered
> > > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> > > base_baud = 6250000) is a ATMEL_SERIAL
> > > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> > > base_baud = 6250000) is a ATMEL_SERIAL
> > > [    3.756264 ] random: fast init done
> > > [    4.064725 ] console [ttyS0] enabled
> > > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> > > base_baud = 6250000) is a ATMEL_SERIAL
> > > [    4.143473 ] brd: module loaded
> > > [    4.256253 ] loop: module loaded
> > > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and
> dma0chan3
> > > (rx) for DMA transfers
> > > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> > > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version
> 0x221
> > > at 0xf8010000 (irq 24)
> > > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and
> dma0chan5
> > > (rx) for DMA transfers
> > > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version
> 0x221
> > > at 0xfc018000 (irq 31)
> > > [    4.356675 ] libphy: Fixed MDIO Bus: probed
> > > [    4.369182 ] libphy: MACB_mii_bus: probed
> > > [    4.399395 ] ------------[ cut here  ]------------
> > > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
> > > irq_set_chip+0xbc/0xcc
> > > [    4.411649 ] irqchip GPIO is not pipeline-safe!
> > > [    4.411660 ] Modules linked in:
> > > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
> > > [    4.424953 ] Hardware name: Atmel SAMA5
> > > [    4.428667 ] I-pipe domain: Linux
> > > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
> > > (show_stack+0x10/0x14)
> > > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
> > > (__warn+0xf4/0x10c)
> > > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
> > > (warn_slowpath_fmt+0x48/0x6c)
> > > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
> > > (irq_set_chip+0xbc/0xcc)
> > > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
> > > (irq_set_chip_and_handler_name+0x14/0x2c)
> > > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
> > > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
> > > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
> > > (irq_domain_associate+0x74/0x1ec)
> > > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
> > > (irq_create_mapping+0x64/0xc8)
> > > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
> > > (irq_create_fwspec_mapping+0x184/0x2c4)
> > > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from
> [<c016da80>]
> > > (irq_create_of_mapping+0x5c/0x78)
> > > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
> > > (of_irq_get+0x6c/0xb8)
> > > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
> > > (of_mdiobus_register_phy+0x84/0x17c)
> > > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from
> [<c06319b8>]
> > > (of_mdiobus_register+0xf4/0x304)
> > > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
> > > (macb_probe+0x72c/0xad0)
> > > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
> > > (platform_drv_probe+0x48/0x98)
> > > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
> > > (really_probe+0x1d8/0x2c0)
> > > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
> > > (driver_probe_device+0x60/0x160)
> > > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
> > > (__driver_attach+0xe8/0xec)
> > > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
> > > (bus_for_each_dev+0x74/0xb4)
> > > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
> > > (bus_add_driver+0x18c/0x210)
> > > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
> > > (driver_register+0x7c/0x114)
> > > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
> > > (do_one_initcall+0x88/0x22c)
> > > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
> > > (kernel_init_freeable+0x26c/0x304)
> > > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
> > > (kernel_init+0x8/0x108)
> > > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
> > > (ret_from_fork+0x18/0x24)
> > > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
> > > [    4.644852 ] dfa0:                                     00000000
> > > 00000000 00000000 00000000
> > > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
> > > 00000000 00000000 00000000
> > > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013
> 00000000
> > > [    4.667652 ] irq event stamp: 145160
> > > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
> > > _raw_spin_unlock_irqrestore+0x30/0x58
> > > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
> > > _raw_spin_lock_irqsave+0x1c/0x98
> > > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
> > > __do_softirq+0x2a4/0x420
> > > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
> > > irq_exit+0x1a4/0x1a8
> > > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
> > > [    4.819300 ] Micrel KSZ8081 or KSZ8091
> f8020000.ethernet-ffffffff:01:
> > > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> > > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> > > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev
> 0x00020120 at
> > > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> > > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI)
> Driver
> > > [    4.852778 ] ehci-atmel: EHCI Atmel driver
> > > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
> > > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered,
> assigned
> > > bus number 1
> > > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> > > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> > > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
> > > idProduct=0002, bcdDevice= 4.19
> > > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> > > SerialNumber=1
> > > [    4.935857 ] usb usb1: Product: EHCI Host Controller
> > > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> > > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
> > > [    4.960887 ] hub 1-0:1.0: USB hub found
> > > [    4.967182 ] hub 1-0:1.0: 3 ports detected
> > > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> > > [    4.988376 ] ohci-atmel: OHCI Atmel driver
> > > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
> > > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
> > > bus number 2
> > > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> > > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
> > > idProduct=0001, bcdDevice= 4.19
> > > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> > > SerialNumber=1
> > > [    5.106711 ] usb usb2: Product: USB Host Controller
> > > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> > > [    5.117146 ] usb usb2: SerialNumber: at91
> > > [    5.127252 ] hub 2-0:1.0: USB hub found
> > > [    5.133470 ] hub 2-0:1.0: 3 ports detected
> > > [    5.150121 ] usbcore: registered new interface driver cdc_acm
> > > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB
> modems
> > > and ISDN adapters
> > > [    5.164776 ] usbcore: registered new interface driver usb-storage
> > > [    5.171788 ] usbcore: registered new interface driver
> usbserial_generic
> > > [    5.179229 ] usbserial: USB Serial support registered for generic
> > > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
> > > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
> > > Serial Device
> > > [    5.199977 ] usbcore: registered new interface driver pl2303
> > > [    5.205993 ] usbserial: USB Serial support registered for pl2303
> > > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> > > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> > > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> > > 0x00400000-0x004fffff] mapped at (ptrval)
> > > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
> > > [    5.270268 ] g_serial gadget: g_serial ready
> > > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
> > > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> > > [    5.298694 ] i2c /dev entries driver
> > > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
> > > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout =
> 16
> > > sec, nowayout = 0)
> > > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
> > > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
> > > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
> > > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA
> transfers
> > > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to
> regulator.2
> > > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to
> regulator.1
> > > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at
> 0xfc000000
> > > irq 28, 1 slots
> > > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
> > > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
> > > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> > > dma1chan1 for DMA transfers
> > > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
> > > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA
> transfers
> > > [    5.516378 ] atmel_sha fc050000.sha: Atmel
> > > SHA1/SHA256/SHA224/SHA384/SHA512
> > > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
> > > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4
> for
> > > DMA transfers
> > > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> > > [    5.566514 ] usbcore: registered new interface driver usbhid
> > > [    5.572227 ] usbhid: USB HID core driver
> > > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID:
> 0xdc
> > > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
> > > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size:
> 4096,
> > > OOB size: 224
> > > [    5.622318 ] Bad block table not found for chip 0
> > > [    5.629946 ] Bad block table not found for chip 0
> > > [    5.634709 ] Scanning device for bad blocks
> > > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
> > > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
> > > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
> > > atmel_nand
> > > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
> > > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> > > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
> > > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> > > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
> > > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
> > > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
> > > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
> > > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
> > > [    6.396804 ] NET: Registered protocol family 10
> > > [    6.418370 ] Segment Routing with IPv6
> > > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> > > [    6.434188 ] NET: Registered protocol family 17
> > > [    6.452130 ] Loading compiled-in X.509 certificates
> > > [    6.565366 ] input: gpio_keys as
> > > /devices/platform/gpio_keys/input/input0
> > > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to
> 2012-01-02
> > > 07:59:53 UTC (1325491193)
> > > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> > > [   16.620548 ] Waiting up to 110 more seconds for network.
> > >
> > > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions
> that
> > > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering
> why
> > > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
> > > same family.
> > >
> > > Any suggestions on how to narrow the root case of that freeze will be
> > > greatly appreciated.
> > >
> > > Best regards,
> > > Vladimir Petrigo
> > >
> > > The back trace in the log means that this chip hasn't been fully
> ported to
> > the ipipe kernel and is missing the flag to identify the gpiochip as
> > pipeline safe.   It is possible the ipipe kernel hasn't been ported
> > properly to this target.  Check the gpio driver and irq chip driver and
> the
> > timer driver to see if they have any ipipe related code.  It's possible
> > this target was supported by older ipipe versions but wasn't fully ported
> > to a recent version of the ipipe.  I'll check tonight when I get a chance
> > to confirm if this target has support.
> >
> > -Greg
> Gregg,
>
> Thank you for your response. I was able to get rid of irqchip GPIO pipeline
> safety and the kernel boot log looks like that:
>
> Starting kernel ...
>
> [    0.000000 ] Booting Linux on physical CPU 0x0
> [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
> Mar 1 23:27:31 MSK 2021
> [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> cr=10c53c7d
> [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> [    0.000000 ] Memory policy: Data cache writeback
> [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> [    0.000000 ] random: get_random_bytes called from
> start_kernel+0x94/0x488 with crng_init=0
> [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> 130048
> [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> ip=dhcp
> nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
> rw
> [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> bytes)
> [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> bytes)
> [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
> rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> cma-reserved)
> [    0.000000 ] Virtual kernel memory layout:
> [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
> [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> latencies.
> [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 152900835740 ns
> [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
> 171798691800ns
> [    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> [    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> [    0.000628 ] Interrupt pipeline (release #10)
> [    0.002823 ] console [rawcon-1] enabled
> [    0.003301 ] Console: colour dummy device 80x30
> [    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> Inc., Ingo Molnar
> [    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> [    0.003542 ] ... MAX_LOCK_DEPTH:          48
> [    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
> [    0.003655 ] ... CLASSHASH_SIZE:          4096
> [    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
> [    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
> [    0.003824 ] ... CHAINHASH_SIZE:          32768
> [    0.003881 ]  memory used by lock dependency info: 4911 kB
> [    0.003938 ]  per task-struct memory footprint: 2304 bytes
> [    0.003994 ] ------------------------
> [    0.004049 ] | Locking API testsuite:
> [    0.004104 ]
>
> ----------------------------------------------------------------------------
> [    0.004160 ]                                  | spin |wlock |rlock
> |mutex | wsem | rsem |
> [    0.004217 ]
> --------------------------------------------------------------------------
> [    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |
> [    0.247299 ]
> --------------------------------------------------------------------------
> [    0.247363 ]               recursive read-lock:             |  ok  |
> |  ok  |
> [    0.254944 ]            recursive read-lock #2:             |  ok  |
> |  ok  |
> [    0.262477 ]             mixed read-write-lock:             |  ok  |
> |  ok  |
> [    0.269925 ]             mixed write-read-lock:             |  ok  |
> |  ok  |
> [    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> |  ok  |
> [    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> |  ok  |
> [    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> |  ok  |
> [    0.300859 ]
> --------------------------------------------------------------------------
> [    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> [    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> [    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.827223 ]       hard-irq read-recursion/123:  ok  |
> [    0.831229 ]       soft-irq read-recursion/123:  ok  |
> [    0.835128 ]       hard-irq read-recursion/132:  ok  |
> [    0.838984 ]       soft-irq read-recursion/132:  ok  |
> [    0.843014 ]       hard-irq read-recursion/213:  ok  |
> [    0.846887 ]       soft-irq read-recursion/213:  ok  |
> [    0.850914 ]       hard-irq read-recursion/231:  ok  |
> [    0.854791 ]       soft-irq read-recursion/231:  ok  |
> [    0.858667 ]       hard-irq read-recursion/312:  ok  |
> [    0.862678 ]       soft-irq read-recursion/312:  ok  |
> [    0.866573 ]       hard-irq read-recursion/321:  ok  |
> [    0.870576 ]       soft-irq read-recursion/321:  ok  |
> [    0.874470 ]
> --------------------------------------------------------------------------
> [    0.874529 ]   | Wound/wait tests |
> [    0.874584 ]   ---------------------
> [    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
> [    0.886282 ]                ww contexts mixing:  ok  |  ok  |
> [    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
> |
> [    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
> [    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
> |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> [    0.959317 ]            spinlock nest unlocked:  ok  |
> [    0.963229 ]   -----------------------------------------------------
> [    0.963289 ]                                  |block | try  |context|
> [    0.963345 ]   -----------------------------------------------------
> [    0.963402 ]                           context:  ok  |  ok  |  ok  |
> [    0.975067 ]                               try:  ok  |  ok  |  ok  |
> [    0.986404 ]                             block:  ok  |  ok  |  ok  |
> [    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
> [    1.009525 ] -------------------------------------------------------
> [    1.009588 ] Good, all 261 testcases passed! |
> [    1.009645 ] ---------------------------------
> [    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> [    1.060152 ] pid_max: default: 32768 minimum: 301
> [    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> [    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> bytes)
> [    1.067262 ] CPU: Testing write buffer coherency: ok
> [    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
> [    1.082517 ] devtmpfs: initialized
> [    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
> variant 5 rev 1
> [    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> [    1.181399 ] pinctrl core: initialized pinctrl subsystem
> [    1.204878 ] NET: Registered protocol family 16
> [    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
> allocations
> [    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
> [    1.335018 ] No ATAGs?
> [    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> [    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> [    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> [    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
> [    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> [    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> pinctrl driver
> [    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.719680 ] AT91: Detected SoC family: sama5d4
> [    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
> [    1.724446 ] VDD MCI1: supplied by VCC 3V3
> [    1.730458 ] SCSI subsystem initialized
> [    1.733270 ] usbcore: registered new interface driver usbfs
> [    1.734011 ] usbcore: registered new interface driver hub
> [    1.734521 ] usbcore: registered new device driver usb
> [    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> (rx) for DMA transfers
> [    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> 0x502).
> [    1.744531 ] videodev: Linux video capture interface: v2.00
> [    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
> [    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
> Giometti <giometti@linux.it>
> [    1.745276 ] PTP clock support registered
> [    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
> [    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
> [    2.567438 ] NET: Registered protocol family 2
> [    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
> 12288 bytes)
> [    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
> bytes)
> [    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> [    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
> [    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> [    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> [    2.576049 ] NET: Registered protocol family 1
> [    2.583998 ] RPC: Registered named UNIX socket transport module.
> [    2.584202 ] RPC: Registered udp transport module.
> [    2.584274 ] RPC: Registered tcp transport module.
> [    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [    2.595180 ] [Xenomai] scheduling class idle registered.
> [    2.595264 ] [Xenomai] scheduling class rt registered.
> [    2.596739 ] I-pipe: head domain Xenomai registered.
> [    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
> [    2.631931 ] Initialise system trusted keyrings
> [    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> [    2.680240 ] Key type asymmetric registered
> [    2.680621 ] Asymmetric key parser 'x509' registered
> [    2.681033 ] io scheduler noop registered (default)
> [    2.681119 ] io scheduler mq-deadline registered
> [    2.681187 ] io scheduler kyber registered
> [    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    3.749595 ] random: fast init done
> [    4.057967 ] console [ttyS0] enabled
> [    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    4.136696 ] brd: module loaded
> [    4.249170 ] loop: module loaded
> [    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> (rx) for DMA transfers
> [    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> [    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> at 0xf8010000 (irq 24)
> [    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> (rx) for DMA transfers
> [    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> at 0xfc018000 (irq 31)
> [    4.349989 ] libphy: Fixed MDIO Bus: probed
> [    4.362450 ] libphy: MACB_mii_bus: probed
> [    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> attached PHY driver [Micrel KSZ8081 or KSZ8091]
> (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> [    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> [    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    4.530712 ] ehci-atmel: EHCI Atmel driver
> [    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
> [    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> bus number 1
> [    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> [    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> [    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
> idProduct=0002, bcdDevice= 4.19
> [    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    4.613818 ] usb usb1: Product: EHCI Host Controller
> [    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> [    4.624337 ] usb usb1: SerialNumber: 600000.ehci
> [    4.638766 ] hub 1-0:1.0: USB hub found
> [    4.645049 ] hub 1-0:1.0: 3 ports detected
> [    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [    4.666149 ] ohci-atmel: OHCI Atmel driver
> [    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
> [    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
> number 2
> [    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> [    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
> idProduct=0001, bcdDevice= 4.19
> [    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    4.784659 ] usb usb2: Product: USB Host Controller
> [    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> [    4.795098 ] usb usb2: SerialNumber: at91
> [    4.805171 ] hub 2-0:1.0: USB hub found
> [    4.811383 ] hub 2-0:1.0: 3 ports detected
> [    4.827989 ] usbcore: registered new interface driver cdc_acm
> [    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
> and ISDN adapters
> [    4.842644 ] usbcore: registered new interface driver usb-storage
> [    4.849656 ] usbcore: registered new interface driver usbserial_generic
> [    4.857097 ] usbserial: USB Serial support registered for generic
> [    4.863859 ] usbcore: registered new interface driver ftdi_sio
> [    4.870025 ] usbserial: USB Serial support registered for FTDI USB
> Serial Device
> [    4.877858 ] usbcore: registered new interface driver pl2303
> [    4.883870 ] usbserial: USB Serial support registered for pl2303
> [    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> [    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> 0x00400000-0x004fffff] mapped at (ptrval)
> [    4.943428 ] g_serial gadget: Gadget Serial v2.4
> [    4.948109 ] g_serial gadget: g_serial ready
> [    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
> [    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> [    4.976514 ] i2c /dev entries driver
> [    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
> [    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> sec, nowayout = 0)
> [    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
> [    5.041289 ] sdhci: Copyright(c) Pierre Ossman
> [    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
> [    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> [    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> [    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> [    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> irq 28, 1 slots
> [    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
> [    5.132517 ] atmel_aes fc044000.aes: version: 0x201
> [    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> dma1chan1 for DMA transfers
> [    5.172334 ] atmel_sha fc050000.sha: version: 0x420
> [    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> [    5.193368 ] atmel_sha fc050000.sha: Atmel
> SHA1/SHA256/SHA224/SHA384/SHA512
> [    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
> [    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> DMA transfers
> [    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> [    5.243183 ] usbcore: registered new interface driver usbhid
> [    5.248897 ] usbhid: USB HID core driver
> [    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> [    5.279605 ] nand: Micron MT29F4G08ABAEAWP
> [    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> OOB size: 224
> [    5.298878 ] Bad block table not found for chip 0
> [    5.306500 ] Bad block table not found for chip 0
> [    5.311258 ] Scanning device for bad blocks
> [    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
> [    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
> [    5.802851 ] 6 fixed-partitions partitions found on MTD device
> atmel_nand
> [    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
> [    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> [    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
> [    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> [    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
> [    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
> [    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
> [    6.039378 ] NET: Registered protocol family 10
> [    6.060590 ] Segment Routing with IPv6
> [    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [    6.075969 ] NET: Registered protocol family 17
> [    6.093926 ] Loading compiled-in X.509 certificates
> [    6.205946 ] input: gpio_keys as
> /devices/platform/gpio_keys/input/input0
> [    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
> 02:15:53 UTC (1325384153)
> [    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [   16.268525 ] Waiting up to 110 more seconds for network.
> [   26.288522 ] Waiting up to 100 more seconds for network.
>
> It has not helped though, the result is still the same:
>  - no ethernet cable attached - the kernel is alive
>  - ethernet cable attached - the kernel hangs without any panic/error
>    message
>
> So it it looks like that:
> - system reset without Ethernet cable attached
> - the kernel has been loaded from the NAND -> boot is going on
> - on-board heartbeat LED is blinking periodically
> - board is awaiting for ethernet link
> - insert an Ethernet cable -> system freezed
>
> Maybe there are additional debug options that I can use to figure out what
> is going on?
>
> Best regards,
> Vladimir Petrigo
>

One thing that could be going on is the system is in an interrupt storm and
is not exactly frozen but can't respond. It's possible that inserting the
cable triggered it.  Usually you need to use the low-level print ascii and
put those in some of the interrupt pipeline code and see how the system is
stuck.  Where you able to check the other interrupt sources and check if
they are pipeline safe and have the necessary handlers?

-Greg

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-01 15:02 ` Greg Gallagher
@ 2021-03-01 20:45   ` Vladimir Petrigo
  2021-03-02  6:21     ` Greg Gallagher
  2021-03-02  9:37     ` Philippe Gerum
  0 siblings, 2 replies; 9+ messages in thread
From: Vladimir Petrigo @ 2021-03-01 20:45 UTC (permalink / raw)
  To: Greg Gallagher; +Cc: xenomai

On Mon, Mar 01, 2021 at 10:02:43AM -0500, Greg Gallagher wrote:
> On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
> xenomai@xenomai.org> wrote:
> 
> >
> > Hello,
> >
> > I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
> > ATSAMA5D4 Xplained board.
> >
> > Preliminary:
> > - non-patched Linux kernel 4.19.144 works just fine
> > - I-pipe patched kernel can successfully boot
> > - when I insert an ethernet cable into the on-board ethernet port, the
> >   kernel freezes and the reset is the only solution to get out of that
> >   state. Without the ethernet cable inserted the kernel will work
> >   indefinitely long trying to reach the network and obtain an IP address.
> >   So I assume something may be wrong with Micrel KSZ8081 driver under
> >   Xenomai
> >
> > Here is the boot log:
> >
> > [    0.000000 ] Booting Linux on physical CPU 0x0
> > [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> > (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> > d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
> > Feb 28 07:27:15 MSK 2021
> > [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> > cr=10c53c7d
> > [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> > instruction cache
> > [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> > [    0.000000 ] Memory policy: Data cache writeback
> > [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> > [    0.000000 ] random: get_random_bytes called from
> > start_kernel+0x94/0x488 with crng_init=0
> > [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> > 130048
> > [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> > ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
> > [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> > bytes)
> > [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> > bytes)
> > [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
> > 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> > cma-reserved)
> > [    0.000000 ] Virtual kernel memory layout:
> > [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> > [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> > [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> > [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> > [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> > [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> > [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> > [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
> > [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> > [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> > [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> > [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> > latencies.
> > [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> > [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> > [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> > [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> > [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> > 0xffffffff, max_idle_ns: 152900835740 ns
> > [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
> > every 171798691800ns
> > [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> > [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> > max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> > [    0.000627 ] Interrupt pipeline (release #10)
> > [    0.002773 ] console [rawcon-1] enabled
> > [    0.003252 ] Console: colour dummy device 80x30
> > [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> > Inc., Ingo Molnar
> > [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> > [    0.003489 ] ... MAX_LOCK_DEPTH:          48
> > [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
> > [    0.003599 ] ... CLASSHASH_SIZE:          4096
> > [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
> > [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
> > [    0.003762 ] ... CHAINHASH_SIZE:          32768
> > [    0.003818 ]  memory used by lock dependency info: 4911 kB
> > [    0.003873 ]  per task-struct memory footprint: 2304 bytes
> > [    0.003928 ] ------------------------
> > [    0.003981 ] | Locking API testsuite:
> > [    0.004036 ]
> > ----------------------------------------------------------------------------
> > [    0.004092 ]                                  | spin |wlock |rlock
> > |mutex | wsem | rsem |
> > [    0.004146 ]
> >  --------------------------------------------------------------------------
> > [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |
> > [    0.247217 ]
> >  --------------------------------------------------------------------------
> > [    0.247280 ]               recursive read-lock:             |  ok  |
> >          |  ok  |
> > [    0.254871 ]            recursive read-lock #2:             |  ok  |
> >          |  ok  |
> > [    0.262417 ]             mixed read-write-lock:             |  ok  |
> >          |  ok  |
> > [    0.269870 ]             mixed write-read-lock:             |  ok  |
> >          |  ok  |
> > [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
> >          |  ok  |
> > [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
> >          |  ok  |
> > [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
> >          |  ok  |
> > [    0.300789 ]
> >  --------------------------------------------------------------------------
> > [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> > [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> > [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> > [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> > [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> > [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> > [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> > [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> > [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> > [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> > [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> > [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> > [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> > [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> > [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> > [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> > [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> > [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> > [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> > [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> > [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> > [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> > [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> > [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> > [    0.827212 ]       hard-irq read-recursion/123:  ok  |
> > [    0.831217 ]       soft-irq read-recursion/123:  ok  |
> > [    0.835119 ]       hard-irq read-recursion/132:  ok  |
> > [    0.838973 ]       soft-irq read-recursion/132:  ok  |
> > [    0.843002 ]       hard-irq read-recursion/213:  ok  |
> > [    0.846878 ]       soft-irq read-recursion/213:  ok  |
> > [    0.850910 ]       hard-irq read-recursion/231:  ok  |
> > [    0.854788 ]       soft-irq read-recursion/231:  ok  |
> > [    0.858666 ]       hard-irq read-recursion/312:  ok  |
> > [    0.862667 ]       soft-irq read-recursion/312:  ok  |
> > [    0.866570 ]       hard-irq read-recursion/321:  ok  |
> > [    0.870572 ]       soft-irq read-recursion/321:  ok  |
> > [    0.874467 ]
> >  --------------------------------------------------------------------------
> > [    0.874526 ]   | Wound/wait tests |
> > [    0.874581 ]   ---------------------
> > [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
> > [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
> > [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
> > ok  |
> > [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
> > [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
> > ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> > [    0.959308 ]            spinlock nest unlocked:  ok  |
> > [    0.963226 ]   -----------------------------------------------------
> > [    0.963284 ]                                  |block | try  |context|
> > [    0.963340 ]   -----------------------------------------------------
> > [    0.963397 ]                           context:  ok  |  ok  |  ok  |
> > [    0.975060 ]                               try:  ok  |  ok  |  ok  |
> > [    0.986408 ]                             block:  ok  |  ok  |  ok  |
> > [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
> > [    1.009546 ] -------------------------------------------------------
> > [    1.009607 ] Good, all 261 testcases passed! |
> > [    1.009661 ] ---------------------------------
> > [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> > [    1.060146 ] pid_max: default: 32768 minimum: 301
> > [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> > [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> > bytes)
> > [    1.067206 ] CPU: Testing write buffer coherency: ok
> > [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
> > [    1.082477 ] devtmpfs: initialized
> > [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
> > variant 5 rev 1
> > [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> > 0xffffffff, max_idle_ns: 19112604462750000 ns
> > [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> > [    1.183030 ] pinctrl core: initialized pinctrl subsystem
> > [    1.206526 ] NET: Registered protocol family 16
> > [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
> > allocations
> > [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
> > [    1.333809 ] No ATAGs?
> > [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> > [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> > [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> > [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
> > [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> > [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> > pinctrl driver
> > [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> > 0x(ptrval)
> > [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> > 0x(ptrval)
> > [    1.721621 ] AT91: Detected SoC family: sama5d4
> > [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
> > [    1.726407 ] VDD MCI1: supplied by VCC 3V3
> > [    1.732481 ] SCSI subsystem initialized
> > [    1.735296 ] usbcore: registered new interface driver usbfs
> > [    1.736049 ] usbcore: registered new interface driver hub
> > [    1.736561 ] usbcore: registered new device driver usb
> > [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> > (rx) for DMA transfers
> > [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> > 0x502).
> > [    1.746533 ] videodev: Linux video capture interface: v2.00
> > [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
> > [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
> > Rodolfo Giometti <giometti@linux.it>
> > [    1.747288 ] PTP clock support registered
> > [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
> > [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
> > [    2.574436 ] NET: Registered protocol family 2
> > [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
> > 1, 12288 bytes)
> > [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
> > bytes)
> > [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> > [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
> > [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> > [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> > [    2.583098 ] NET: Registered protocol family 1
> > [    2.591094 ] RPC: Registered named UNIX socket transport module.
> > [    2.591298 ] RPC: Registered udp transport module.
> > [    2.591371 ] RPC: Registered tcp transport module.
> > [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> > [    2.602326 ] [Xenomai] scheduling class idle registered.
> > [    2.602406 ] [Xenomai] scheduling class rt registered.
> > [    2.603891 ] I-pipe: head domain Xenomai registered.
> > [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
> > [    2.638984 ] Initialise system trusted keyrings
> > [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> > [    2.687431 ] Key type asymmetric registered
> > [    2.687813 ] Asymmetric key parser 'x509' registered
> > [    2.688226 ] io scheduler noop registered (default)
> > [    2.688308 ] io scheduler mq-deadline registered
> > [    2.688376 ] io scheduler kyber registered
> > [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    3.756264 ] random: fast init done
> > [    4.064725 ] console [ttyS0] enabled
> > [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> > base_baud = 6250000) is a ATMEL_SERIAL
> > [    4.143473 ] brd: module loaded
> > [    4.256253 ] loop: module loaded
> > [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> > (rx) for DMA transfers
> > [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> > [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> > at 0xf8010000 (irq 24)
> > [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> > (rx) for DMA transfers
> > [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> > at 0xfc018000 (irq 31)
> > [    4.356675 ] libphy: Fixed MDIO Bus: probed
> > [    4.369182 ] libphy: MACB_mii_bus: probed
> > [    4.399395 ] ------------[ cut here  ]------------
> > [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
> > irq_set_chip+0xbc/0xcc
> > [    4.411649 ] irqchip GPIO is not pipeline-safe!
> > [    4.411660 ] Modules linked in:
> > [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
> > [    4.424953 ] Hardware name: Atmel SAMA5
> > [    4.428667 ] I-pipe domain: Linux
> > [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
> > (show_stack+0x10/0x14)
> > [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
> > (__warn+0xf4/0x10c)
> > [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
> > (warn_slowpath_fmt+0x48/0x6c)
> > [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
> > (irq_set_chip+0xbc/0xcc)
> > [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
> > (irq_set_chip_and_handler_name+0x14/0x2c)
> > [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
> > [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
> > [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
> > (irq_domain_associate+0x74/0x1ec)
> > [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
> > (irq_create_mapping+0x64/0xc8)
> > [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
> > (irq_create_fwspec_mapping+0x184/0x2c4)
> > [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
> > (irq_create_of_mapping+0x5c/0x78)
> > [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
> > (of_irq_get+0x6c/0xb8)
> > [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
> > (of_mdiobus_register_phy+0x84/0x17c)
> > [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
> > (of_mdiobus_register+0xf4/0x304)
> > [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
> > (macb_probe+0x72c/0xad0)
> > [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
> > (platform_drv_probe+0x48/0x98)
> > [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
> > (really_probe+0x1d8/0x2c0)
> > [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
> > (driver_probe_device+0x60/0x160)
> > [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
> > (__driver_attach+0xe8/0xec)
> > [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
> > (bus_for_each_dev+0x74/0xb4)
> > [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
> > (bus_add_driver+0x18c/0x210)
> > [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
> > (driver_register+0x7c/0x114)
> > [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
> > (do_one_initcall+0x88/0x22c)
> > [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
> > (kernel_init_freeable+0x26c/0x304)
> > [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
> > (kernel_init+0x8/0x108)
> > [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
> > (ret_from_fork+0x18/0x24)
> > [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
> > [    4.644852 ] dfa0:                                     00000000
> > 00000000 00000000 00000000
> > [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
> > 00000000 00000000 00000000
> > [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
> > [    4.667652 ] irq event stamp: 145160
> > [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
> > _raw_spin_unlock_irqrestore+0x30/0x58
> > [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
> > _raw_spin_lock_irqsave+0x1c/0x98
> > [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
> > __do_softirq+0x2a4/0x420
> > [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
> > irq_exit+0x1a4/0x1a8
> > [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
> > [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> > attached PHY driver [Micrel KSZ8081 or KSZ8091]
> > (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> > [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> > 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> > [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> > [    4.852778 ] ehci-atmel: EHCI Atmel driver
> > [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
> > [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> > bus number 1
> > [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> > [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> > [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
> > idProduct=0002, bcdDevice= 4.19
> > [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [    4.935857 ] usb usb1: Product: EHCI Host Controller
> > [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> > [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
> > [    4.960887 ] hub 1-0:1.0: USB hub found
> > [    4.967182 ] hub 1-0:1.0: 3 ports detected
> > [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> > [    4.988376 ] ohci-atmel: OHCI Atmel driver
> > [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
> > [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
> > bus number 2
> > [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> > [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
> > idProduct=0001, bcdDevice= 4.19
> > [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> > SerialNumber=1
> > [    5.106711 ] usb usb2: Product: USB Host Controller
> > [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> > [    5.117146 ] usb usb2: SerialNumber: at91
> > [    5.127252 ] hub 2-0:1.0: USB hub found
> > [    5.133470 ] hub 2-0:1.0: 3 ports detected
> > [    5.150121 ] usbcore: registered new interface driver cdc_acm
> > [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
> > and ISDN adapters
> > [    5.164776 ] usbcore: registered new interface driver usb-storage
> > [    5.171788 ] usbcore: registered new interface driver usbserial_generic
> > [    5.179229 ] usbserial: USB Serial support registered for generic
> > [    5.185995 ] usbcore: registered new interface driver ftdi_sio
> > [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
> > Serial Device
> > [    5.199977 ] usbcore: registered new interface driver pl2303
> > [    5.205993 ] usbserial: USB Serial support registered for pl2303
> > [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> > 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> > [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> > 0x00400000-0x004fffff] mapped at (ptrval)
> > [    5.265577 ] g_serial gadget: Gadget Serial v2.4
> > [    5.270268 ] g_serial gadget: g_serial ready
> > [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
> > [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> > [    5.298694 ] i2c /dev entries driver
> > [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
> > [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> > sec, nowayout = 0)
> > [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
> > [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
> > [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
> > [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> > [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> > [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> > [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> > irq 28, 1 slots
> > [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
> > [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
> > [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> > dma1chan1 for DMA transfers
> > [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
> > [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> > [    5.516378 ] atmel_sha fc050000.sha: Atmel
> > SHA1/SHA256/SHA224/SHA384/SHA512
> > [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
> > [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> > DMA transfers
> > [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> > [    5.566514 ] usbcore: registered new interface driver usbhid
> > [    5.572227 ] usbhid: USB HID core driver
> > [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> > [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
> > [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> > OOB size: 224
> > [    5.622318 ] Bad block table not found for chip 0
> > [    5.629946 ] Bad block table not found for chip 0
> > [    5.634709 ] Scanning device for bad blocks
> > [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
> > [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
> > [    6.124797 ] 6 fixed-partitions partitions found on MTD device
> > atmel_nand
> > [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
> > [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> > [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
> > [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> > [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
> > [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
> > [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
> > [    6.336391 ] iio iio:device0: Resolution used: 10 bits
> > [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
> > [    6.396804 ] NET: Registered protocol family 10
> > [    6.418370 ] Segment Routing with IPv6
> > [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> > [    6.434188 ] NET: Registered protocol family 17
> > [    6.452130 ] Loading compiled-in X.509 certificates
> > [    6.565366 ] input: gpio_keys as
> > /devices/platform/gpio_keys/input/input0
> > [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
> > 07:59:53 UTC (1325491193)
> > [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> > [   16.620548 ] Waiting up to 110 more seconds for network.
> >
> > One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
> > 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
> > it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
> > same family.
> >
> > Any suggestions on how to narrow the root case of that freeze will be
> > greatly appreciated.
> >
> > Best regards,
> > Vladimir Petrigo
> >
> > The back trace in the log means that this chip hasn't been fully ported to
> the ipipe kernel and is missing the flag to identify the gpiochip as
> pipeline safe.   It is possible the ipipe kernel hasn't been ported
> properly to this target.  Check the gpio driver and irq chip driver and the
> timer driver to see if they have any ipipe related code.  It's possible
> this target was supported by older ipipe versions but wasn't fully ported
> to a recent version of the ipipe.  I'll check tonight when I get a chance
> to confirm if this target has support.
> 
> -Greg
Gregg,

Thank you for your response. I was able to get rid of irqchip GPIO pipeline
safety and the kernel boot log looks like that:

Starting kernel ...

[    0.000000 ] Booting Linux on physical CPU 0x0
[    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
(gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #11 Mon
Mar 1 23:27:31 MSK 2021
[    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
cr=10c53c7d
[    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
[    0.000000 ] Memory policy: Data cache writeback
[    0.000000 ] CPU: All CPU(s) started in SVC mode.
[    0.000000 ] random: get_random_bytes called from
start_kernel+0x94/0x488 with crng_init=0
[    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
130048
[    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
ip=dhcp
nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3
rw
[    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
bytes)
[    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
bytes)
[    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1956K
rwdata, 2396K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
cma-reserved)
[    0.000000 ] Virtual kernel memory layout:
[    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
[    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
[    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
[    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
[    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
[    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
[    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1957 kB)
[    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
[    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
[    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
latencies.
[    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
[    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
[    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
[    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 152900835740 ns
[    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every
171798691800ns
[    0.000101 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
[    0.000174 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
[    0.000628 ] Interrupt pipeline (release #10)
[    0.002823 ] console [rawcon-1] enabled
[    0.003301 ] Console: colour dummy device 80x30
[    0.003422 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
Inc., Ingo Molnar
[    0.003484 ] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.003542 ] ... MAX_LOCK_DEPTH:          48
[    0.003599 ] ... MAX_LOCKDEP_KEYS:        8191
[    0.003655 ] ... CLASSHASH_SIZE:          4096
[    0.003712 ] ... MAX_LOCKDEP_ENTRIES:     32768
[    0.003768 ] ... MAX_LOCKDEP_CHAINS:      65536
[    0.003824 ] ... CHAINHASH_SIZE:          32768
[    0.003881 ]  memory used by lock dependency info: 4911 kB
[    0.003938 ]  per task-struct memory footprint: 2304 bytes
[    0.003994 ] ------------------------
[    0.004049 ] | Locking API testsuite:
[    0.004104 ]
----------------------------------------------------------------------------
[    0.004160 ]                                  | spin |wlock |rlock
|mutex | wsem | rsem |
[    0.004217 ]
--------------------------------------------------------------------------
[    0.004298 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.030578 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.057000 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.084223 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.111514 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.139387 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.167442 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.195607 ]                     double unlock:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.221610 ]                   initialize held:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |
[    0.247299 ]
--------------------------------------------------------------------------
[    0.247363 ]               recursive read-lock:             |  ok  |
|  ok  |
[    0.254944 ]            recursive read-lock #2:             |  ok  |
|  ok  |
[    0.262477 ]             mixed read-write-lock:             |  ok  |
|  ok  |
[    0.269925 ]             mixed write-read-lock:             |  ok  |
|  ok  |
[    0.277539 ]   mixed read-lock/lock-write ABBA:             |FAILED|
|  ok  |
[    0.285305 ]    mixed read-lock/lock-read ABBA:             |  ok  |
|  ok  |
[    0.293058 ]  mixed write-lock/lock-write ABBA:             |  ok  |
|  ok  |
[    0.300859 ]
--------------------------------------------------------------------------
[    0.300979 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
[    0.312169 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
[    0.323387 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
[    0.334627 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
[    0.345848 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
[    0.357078 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
[    0.368308 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
[    0.379493 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
[    0.390875 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
[    0.402067 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
[    0.413281 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
[    0.424804 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
[    0.436309 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
[    0.447795 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
[    0.459294 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
[    0.470945 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
[    0.482466 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
[    0.493935 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
[    0.505420 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
[    0.516709 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
[    0.528030 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
[    0.539469 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
[    0.551101 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
[    0.562531 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
[    0.574069 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
[    0.585484 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
[    0.597004 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
[    0.608455 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
[    0.619970 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
[    0.631542 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
[    0.643028 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
[    0.654489 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
[    0.666016 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
[    0.677448 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
[    0.688947 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
[    0.700561 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
[    0.712083 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
[    0.723520 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
[    0.735090 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
[    0.746558 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
[    0.758112 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
[    0.769556 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
[    0.781220 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
[    0.792673 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
[    0.804252 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
[    0.815698 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
[    0.827223 ]       hard-irq read-recursion/123:  ok  |
[    0.831229 ]       soft-irq read-recursion/123:  ok  |
[    0.835128 ]       hard-irq read-recursion/132:  ok  |
[    0.838984 ]       soft-irq read-recursion/132:  ok  |
[    0.843014 ]       hard-irq read-recursion/213:  ok  |
[    0.846887 ]       soft-irq read-recursion/213:  ok  |
[    0.850914 ]       hard-irq read-recursion/231:  ok  |
[    0.854791 ]       soft-irq read-recursion/231:  ok  |
[    0.858667 ]       hard-irq read-recursion/312:  ok  |
[    0.862678 ]       soft-irq read-recursion/312:  ok  |
[    0.866573 ]       hard-irq read-recursion/321:  ok  |
[    0.870576 ]       soft-irq read-recursion/321:  ok  |
[    0.874470 ]
--------------------------------------------------------------------------
[    0.874529 ]   | Wound/wait tests |
[    0.874584 ]   ---------------------
[    0.874641 ]                   ww api failures:  ok  |  ok  |  ok  |
[    0.886282 ]                ww contexts mixing:  ok  |  ok  |
[    0.893936 ]              finishing ww context:  ok  |  ok  |  ok  |  ok
|
[    0.908958 ]                locking mismatches:  ok  |  ok  |  ok  |
[    0.920509 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok
|  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.959317 ]            spinlock nest unlocked:  ok  |
[    0.963229 ]   -----------------------------------------------------
[    0.963289 ]                                  |block | try  |context|
[    0.963345 ]   -----------------------------------------------------
[    0.963402 ]                           context:  ok  |  ok  |  ok  |
[    0.975067 ]                               try:  ok  |  ok  |  ok  |
[    0.986404 ]                             block:  ok  |  ok  |  ok  |
[    0.997791 ]                          spinlock:  ok  |  ok  |  ok  |
[    1.009525 ] -------------------------------------------------------
[    1.009588 ] Good, all 261 testcases passed! |
[    1.009645 ] ---------------------------------
[    1.009816 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
[    1.060152 ] pid_max: default: 32768 minimum: 301
[    1.061293 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    1.061384 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
bytes)
[    1.067262 ] CPU: Testing write buffer coherency: ok
[    1.073895 ] Setting up static identity map for 0x20100000 - 0x20100060
[    1.082517 ] devtmpfs: initialized
[    1.178060 ] VFP support v0.3: implementor 41 architecture 2 part 30
variant 5 rev 1
[    1.180191 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    1.180380 ] futex hash table entries: 256 (order: 1, 13312 bytes)
[    1.181399 ] pinctrl core: initialized pinctrl subsystem
[    1.204878 ] NET: Registered protocol family 16
[    1.207467 ] DMA: preallocated 256 KiB pool for atomic coherent
allocations
[    1.334929 ] AT91: PM: standby: standby, suspend: ulp0
[    1.335018 ] No ATAGs?
[    1.394537 ] gpio-at91 fc06a000.gpio: at address (ptrval)
[    1.402607 ] gpio-at91 fc06b000.gpio: at address (ptrval)
[    1.410674 ] gpio-at91 fc06c000.gpio: at address (ptrval)
[    1.418935 ] gpio-at91 fc068000.gpio: at address (ptrval)
[    1.427068 ] gpio-at91 fc06d000.gpio: at address (ptrval)
[    1.438125 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
pinctrl driver
[    1.702130 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
0x(ptrval)
[    1.716751 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
0x(ptrval)
[    1.719680 ] AT91: Detected SoC family: sama5d4
[    1.719765 ] AT91: Detected SoC: sama5d44, revision 0
[    1.724446 ] VDD MCI1: supplied by VCC 3V3
[    1.730458 ] SCSI subsystem initialized
[    1.733270 ] usbcore: registered new interface driver usbfs
[    1.734011 ] usbcore: registered new interface driver hub
[    1.734521 ] usbcore: registered new device driver usb
[    1.739709 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
(rx) for DMA transfers
[    1.742271 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
0x502).
[    1.744531 ] videodev: Linux video capture interface: v2.00
[    1.744970 ] pps_core: LinuxPPS API ver. 1 registered
[    1.745040 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
Giometti <giometti@linux.it>
[    1.745276 ] PTP clock support registered
[    1.748200 ] Advanced Linux Sound Architecture Driver Initialized.
[    1.838340 ] clocksource: Switched to clocksource ipipe_tsc
[    2.567438 ] NET: Registered protocol family 2
[    2.571245 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1,
12288 bytes)
[    2.571461 ] TCP established hash table entries: 4096 (order: 2, 16384
bytes)
[    2.571663 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
[    2.573182 ] TCP: Hash tables configured (established 4096 bind 4096)
[    2.574432 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
[    2.574770 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
[    2.576049 ] NET: Registered protocol family 1
[    2.583998 ] RPC: Registered named UNIX socket transport module.
[    2.584202 ] RPC: Registered udp transport module.
[    2.584274 ] RPC: Registered tcp transport module.
[    2.584342 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    2.595180 ] [Xenomai] scheduling class idle registered.
[    2.595264 ] [Xenomai] scheduling class rt registered.
[    2.596739 ] I-pipe: head domain Xenomai registered.
[    2.631848 ] [Xenomai] Cobalt v3.1 [DEBUG]
[    2.631931 ] Initialise system trusted keyrings
[    2.634024 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
[    2.680240 ] Key type asymmetric registered
[    2.680621 ] Asymmetric key parser 'x509' registered
[    2.681033 ] io scheduler noop registered (default)
[    2.681119 ] io scheduler mq-deadline registered
[    2.681187 ] io scheduler kyber registered
[    2.723791 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
base_baud = 6250000) is a ATMEL_SERIAL
[    2.733087 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
base_baud = 6250000) is a ATMEL_SERIAL
[    3.749595 ] random: fast init done
[    4.057967 ] console [ttyS0] enabled
[    4.066342 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
base_baud = 6250000) is a ATMEL_SERIAL
[    4.136696 ] brd: module loaded
[    4.249170 ] loop: module loaded
[    4.266071 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
(rx) for DMA transfers
[    4.302768 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
[    4.310126 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
at 0xf8010000 (irq 24)
[    4.321826 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
(rx) for DMA transfers
[    4.336042 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
at 0xfc018000 (irq 31)
[    4.349989 ] libphy: Fixed MDIO Bus: probed
[    4.362450 ] libphy: MACB_mii_bus: probed
[    4.497222 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
attached PHY driver [Micrel KSZ8081 or KSZ8091]
(mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
[    4.512872 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
[    4.524023 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    4.530712 ] ehci-atmel: EHCI Atmel driver
[    4.539580 ] atmel-ehci 600000.ehci: EHCI Host Controller
[    4.545508 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
bus number 1
[    4.554413 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
[    4.588566 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
[    4.597860 ] usb usb1: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 4.19
[    4.606480 ] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[    4.613818 ] usb usb1: Product: EHCI Host Controller
[    4.618807 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
[    4.624337 ] usb usb1: SerialNumber: 600000.ehci
[    4.638766 ] hub 1-0:1.0: USB hub found
[    4.645049 ] hub 1-0:1.0: 3 ports detected
[    4.659850 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    4.666149 ] ohci-atmel: OHCI Atmel driver
[    4.673383 ] at91_ohci 500000.ohci: USB Host Controller
[    4.678929 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus
number 2
[    4.687200 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
[    4.769073 ] usb usb2: New USB device found, idVendor=1d6b,
idProduct=0001, bcdDevice= 4.19
[    4.777306 ] usb usb2: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[    4.784659 ] usb usb2: Product: USB Host Controller
[    4.789565 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
[    4.795098 ] usb usb2: SerialNumber: at91
[    4.805171 ] hub 2-0:1.0: USB hub found
[    4.811383 ] hub 2-0:1.0: 3 ports detected
[    4.827989 ] usbcore: registered new interface driver cdc_acm
[    4.833898 ] cdc_acm: USB Abstract Control Model driver for USB modems
and ISDN adapters
[    4.842644 ] usbcore: registered new interface driver usb-storage
[    4.849656 ] usbcore: registered new interface driver usbserial_generic
[    4.857097 ] usbserial: USB Serial support registered for generic
[    4.863859 ] usbcore: registered new interface driver ftdi_sio
[    4.870025 ] usbserial: USB Serial support registered for FTDI USB
Serial Device
[    4.877858 ] usbcore: registered new interface driver pl2303
[    4.883870 ] usbserial: USB Serial support registered for pl2303
[    4.893041 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
0xfc02c000-0xfc02ffff] mapped at (ptrval)
[    4.903027 ] atmel_usba_udc 400000.gadget: FIFO at [mem
0x00400000-0x004fffff] mapped at (ptrval)
[    4.943428 ] g_serial gadget: Gadget Serial v2.4
[    4.948109 ] g_serial gadget: g_serial ready
[    4.963621 ] at91_rtc fc0686b0.rtc: registered as rtc0
[    4.970004 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
[    4.976514 ] i2c /dev entries driver
[    4.994376 ] at91-reset fc068600.rstc: Starting after user reset
[    5.023529 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
sec, nowayout = 0)
[    5.034925 ] sdhci: Secure Digital Host Controller Interface driver
[    5.041289 ] sdhci: Copyright(c) Pierre Ossman
[    5.048085 ] atmel_mci fc000000.mmc: version: 0x600
[    5.053645 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
[    5.062099 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
[    5.070064 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
[    5.106390 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
irq 28, 1 slots
[    5.115527 ] sdhci-pltfm: SDHCI platform and OF driver helper
[    5.132517 ] atmel_aes fc044000.aes: version: 0x201
[    5.161411 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
dma1chan1 for DMA transfers
[    5.172334 ] atmel_sha fc050000.sha: version: 0x420
[    5.177730 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
[    5.193368 ] atmel_sha fc050000.sha: Atmel
SHA1/SHA256/SHA224/SHA384/SHA512
[    5.202734 ] atmel_tdes fc04c000.tdes: version: 0x702
[    5.209127 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
DMA transfers
[    5.236254 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
[    5.243183 ] usbcore: registered new interface driver usbhid
[    5.248897 ] usbhid: USB HID core driver
[    5.272920 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
[    5.279605 ] nand: Micron MT29F4G08ABAEAWP
[    5.283587 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
OOB size: 224
[    5.298878 ] Bad block table not found for chip 0
[    5.306500 ] Bad block table not found for chip 0
[    5.311258 ] Scanning device for bad blocks
[    5.786599 ] Bad block table written to 0x00001ffc0000, version 0x01
[    5.795454 ] Bad block table written to 0x00001ff80000, version 0x01
[    5.802851 ] 6 fixed-partitions partitions found on MTD device
atmel_nand
[    5.809729 ] Creating 6 MTD partitions on "atmel_nand":
[    5.814901 ] 0x000000000000-0x000000040000 : "at91bootstrap"
[    5.838191 ] 0x000000040000-0x0000000c0000 : "bootloader"
[    5.857925 ] 0x0000000c0000-0x000000180000 : "bootloader env"
[    5.877876 ] 0x000000180000-0x000000200000 : "device tree"
[    5.897543 ] 0x000000200000-0x000000800000 : "kernel"
[    5.917636 ] 0x000000800000-0x000020000000 : "rootfs"
[    6.039378 ] NET: Registered protocol family 10
[    6.060590 ] Segment Routing with IPv6
[    6.064537 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    6.075969 ] NET: Registered protocol family 17
[    6.093926 ] Loading compiled-in X.509 certificates
[    6.205946 ] input: gpio_keys as
/devices/platform/gpio_keys/input/input0
[    6.222642 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01
02:15:53 UTC (1325384153)
[    6.242516 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.268525 ] Waiting up to 110 more seconds for network.
[   26.288522 ] Waiting up to 100 more seconds for network.

It has not helped though, the result is still the same:
 - no ethernet cable attached - the kernel is alive
 - ethernet cable attached - the kernel hangs without any panic/error
   message

So it it looks like that:
- system reset without Ethernet cable attached
- the kernel has been loaded from the NAND -> boot is going on
- on-board heartbeat LED is blinking periodically
- board is awaiting for ethernet link
- insert an Ethernet cable -> system freezed

Maybe there are additional debug options that I can use to figure out what
is going on?

Best regards,
Vladimir Petrigo


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: ATSAMA5D4 Xplained freeze with Xenomai kernel
  2021-03-01 14:41 Vladimir Petrigo
@ 2021-03-01 15:02 ` Greg Gallagher
  2021-03-01 20:45   ` Vladimir Petrigo
  0 siblings, 1 reply; 9+ messages in thread
From: Greg Gallagher @ 2021-03-01 15:02 UTC (permalink / raw)
  To: Vladimir Petrigo; +Cc: Xenomai@xenomai.org

On Mon, Mar 1, 2021 at 9:42 AM Vladimir Petrigo via Xenomai <
xenomai@xenomai.org> wrote:

>
> Hello,
>
> I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
> ATSAMA5D4 Xplained board.
>
> Preliminary:
> - non-patched Linux kernel 4.19.144 works just fine
> - I-pipe patched kernel can successfully boot
> - when I insert an ethernet cable into the on-board ethernet port, the
>   kernel freezes and the reset is the only solution to get out of that
>   state. Without the ethernet cable inserted the kernel will work
>   indefinitely long trying to reach the network and obtain an IP address.
>   So I assume something may be wrong with Micrel KSZ8081 driver under
>   Xenomai
>
> Here is the boot log:
>
> [    0.000000 ] Booting Linux on physical CPU 0x0
> [    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain)
> (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision
> d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun
> Feb 28 07:27:15 MSK 2021
> [    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7),
> cr=10c53c7d
> [    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
> [    0.000000 ] Memory policy: Data cache writeback
> [    0.000000 ] CPU: All CPU(s) started in SVC mode.
> [    0.000000 ] random: get_random_bytes called from
> start_kernel+0x94/0x488 with crng_init=0
> [    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages:
> 130048
> [    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs
> ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
> [    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144
> bytes)
> [    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072
> bytes)
> [    0.000000 ] Memory: 498560K/524288K available (7168K kernel code,
> 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K
> cma-reserved)
> [    0.000000 ] Virtual kernel memory layout:
> [    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
> [    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> [    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
> [    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
> [    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
> [    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
> [    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
> [    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
> [    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
> [    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> [    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
> [    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high
> latencies.
> [    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
> [    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
> [    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
> [    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
> [    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 152900835740 ns
> [    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps
> every 171798691800ns
> [    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
> [    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff
> max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
> [    0.000627 ] Interrupt pipeline (release #10)
> [    0.002773 ] console [rawcon-1] enabled
> [    0.003252 ] Console: colour dummy device 80x30
> [    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat,
> Inc., Ingo Molnar
> [    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
> [    0.003489 ] ... MAX_LOCK_DEPTH:          48
> [    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
> [    0.003599 ] ... CLASSHASH_SIZE:          4096
> [    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
> [    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
> [    0.003762 ] ... CHAINHASH_SIZE:          32768
> [    0.003818 ]  memory used by lock dependency info: 4911 kB
> [    0.003873 ]  per task-struct memory footprint: 2304 bytes
> [    0.003928 ] ------------------------
> [    0.003981 ] | Locking API testsuite:
> [    0.004036 ]
> ----------------------------------------------------------------------------
> [    0.004092 ]                                  | spin |wlock |rlock
> |mutex | wsem | rsem |
> [    0.004146 ]
>  --------------------------------------------------------------------------
> [    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |
> [    0.247217 ]
>  --------------------------------------------------------------------------
> [    0.247280 ]               recursive read-lock:             |  ok  |
>          |  ok  |
> [    0.254871 ]            recursive read-lock #2:             |  ok  |
>          |  ok  |
> [    0.262417 ]             mixed read-write-lock:             |  ok  |
>          |  ok  |
> [    0.269870 ]             mixed write-read-lock:             |  ok  |
>          |  ok  |
> [    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|
>          |  ok  |
> [    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |
>          |  ok  |
> [    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |
>          |  ok  |
> [    0.300789 ]
>  --------------------------------------------------------------------------
> [    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
> [    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
> [    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
> [    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
> [    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
> [    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
> [    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
> [    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
> [    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
> [    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
> [    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
> [    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
> [    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
> [    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
> [    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
> [    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
> [    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
> [    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
> [    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
> [    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
> [    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
> [    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
> [    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
> [    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
> [    0.827212 ]       hard-irq read-recursion/123:  ok  |
> [    0.831217 ]       soft-irq read-recursion/123:  ok  |
> [    0.835119 ]       hard-irq read-recursion/132:  ok  |
> [    0.838973 ]       soft-irq read-recursion/132:  ok  |
> [    0.843002 ]       hard-irq read-recursion/213:  ok  |
> [    0.846878 ]       soft-irq read-recursion/213:  ok  |
> [    0.850910 ]       hard-irq read-recursion/231:  ok  |
> [    0.854788 ]       soft-irq read-recursion/231:  ok  |
> [    0.858666 ]       hard-irq read-recursion/312:  ok  |
> [    0.862667 ]       soft-irq read-recursion/312:  ok  |
> [    0.866570 ]       hard-irq read-recursion/321:  ok  |
> [    0.870572 ]       soft-irq read-recursion/321:  ok  |
> [    0.874467 ]
>  --------------------------------------------------------------------------
> [    0.874526 ]   | Wound/wait tests |
> [    0.874581 ]   ---------------------
> [    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
> [    0.886288 ]                ww contexts mixing:  ok  |  ok  |
> [    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |
> ok  |
> [    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
> [    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |
> ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
> [    0.959308 ]            spinlock nest unlocked:  ok  |
> [    0.963226 ]   -----------------------------------------------------
> [    0.963284 ]                                  |block | try  |context|
> [    0.963340 ]   -----------------------------------------------------
> [    0.963397 ]                           context:  ok  |  ok  |  ok  |
> [    0.975060 ]                               try:  ok  |  ok  |  ok  |
> [    0.986408 ]                             block:  ok  |  ok  |  ok  |
> [    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
> [    1.009546 ] -------------------------------------------------------
> [    1.009607 ] Good, all 261 testcases passed! |
> [    1.009661 ] ---------------------------------
> [    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
> [    1.060146 ] pid_max: default: 32768 minimum: 301
> [    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> [    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> bytes)
> [    1.067206 ] CPU: Testing write buffer coherency: ok
> [    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
> [    1.082477 ] devtmpfs: initialized
> [    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30
> variant 5 rev 1
> [    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
> [    1.183030 ] pinctrl core: initialized pinctrl subsystem
> [    1.206526 ] NET: Registered protocol family 16
> [    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent
> allocations
> [    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
> [    1.333809 ] No ATAGs?
> [    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
> [    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
> [    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
> [    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
> [    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
> [    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91
> pinctrl driver
> [    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at
> 0x(ptrval)
> [    1.721621 ] AT91: Detected SoC family: sama5d4
> [    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
> [    1.726407 ] VDD MCI1: supplied by VCC 3V3
> [    1.732481 ] SCSI subsystem initialized
> [    1.735296 ] usbcore: registered new interface driver usbfs
> [    1.736049 ] usbcore: registered new interface driver hub
> [    1.736561 ] usbcore: registered new device driver usb
> [    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1
> (rx) for DMA transfers
> [    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version:
> 0x502).
> [    1.746533 ] videodev: Linux video capture interface: v2.00
> [    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
> [    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
> Rodolfo Giometti <giometti@linux.it>
> [    1.747288 ] PTP clock support registered
> [    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
> [    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
> [    2.574436 ] NET: Registered protocol family 2
> [    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order:
> 1, 12288 bytes)
> [    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384
> bytes)
> [    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
> [    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
> [    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
> [    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
> [    2.583098 ] NET: Registered protocol family 1
> [    2.591094 ] RPC: Registered named UNIX socket transport module.
> [    2.591298 ] RPC: Registered udp transport module.
> [    2.591371 ] RPC: Registered tcp transport module.
> [    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [    2.602326 ] [Xenomai] scheduling class idle registered.
> [    2.602406 ] [Xenomai] scheduling class rt registered.
> [    2.603891 ] I-pipe: head domain Xenomai registered.
> [    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
> [    2.638984 ] Initialise system trusted keyrings
> [    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
> [    2.687431 ] Key type asymmetric registered
> [    2.687813 ] Asymmetric key parser 'x509' registered
> [    2.688226 ] io scheduler noop registered (default)
> [    2.688308 ] io scheduler mq-deadline registered
> [    2.688376 ] io scheduler kyber registered
> [    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    3.756264 ] random: fast init done
> [    4.064725 ] console [ttyS0] enabled
> [    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30,
> base_baud = 6250000) is a ATMEL_SERIAL
> [    4.143473 ] brd: module loaded
> [    4.256253 ] loop: module loaded
> [    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3
> (rx) for DMA transfers
> [    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
> [    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221
> at 0xf8010000 (irq 24)
> [    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5
> (rx) for DMA transfers
> [    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221
> at 0xfc018000 (irq 31)
> [    4.356675 ] libphy: Fixed MDIO Bus: probed
> [    4.369182 ] libphy: MACB_mii_bus: probed
> [    4.399395 ] ------------[ cut here  ]------------
> [    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55
> irq_set_chip+0xbc/0xcc
> [    4.411649 ] irqchip GPIO is not pipeline-safe!
> [    4.411660 ] Modules linked in:
> [    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
> [    4.424953 ] Hardware name: Atmel SAMA5
> [    4.428667 ] I-pipe domain: Linux
> [    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>]
> (show_stack+0x10/0x14)
> [    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>]
> (__warn+0xf4/0x10c)
> [    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>]
> (warn_slowpath_fmt+0x48/0x6c)
> [    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>]
> (irq_set_chip+0xbc/0xcc)
> [    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>]
> (irq_set_chip_and_handler_name+0x14/0x2c)
> [    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from
> [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
> [    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>]
> (irq_domain_associate+0x74/0x1ec)
> [    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>]
> (irq_create_mapping+0x64/0xc8)
> [    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>]
> (irq_create_fwspec_mapping+0x184/0x2c4)
> [    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>]
> (irq_create_of_mapping+0x5c/0x78)
> [    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>]
> (of_irq_get+0x6c/0xb8)
> [    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>]
> (of_mdiobus_register_phy+0x84/0x17c)
> [    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>]
> (of_mdiobus_register+0xf4/0x304)
> [    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>]
> (macb_probe+0x72c/0xad0)
> [    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>]
> (platform_drv_probe+0x48/0x98)
> [    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>]
> (really_probe+0x1d8/0x2c0)
> [    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>]
> (driver_probe_device+0x60/0x160)
> [    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>]
> (__driver_attach+0xe8/0xec)
> [    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>]
> (bus_for_each_dev+0x74/0xb4)
> [    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>]
> (bus_add_driver+0x18c/0x210)
> [    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>]
> (driver_register+0x7c/0x114)
> [    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>]
> (do_one_initcall+0x88/0x22c)
> [    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>]
> (kernel_init_freeable+0x26c/0x304)
> [    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>]
> (kernel_init+0x8/0x108)
> [    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>]
> (ret_from_fork+0x18/0x24)
> [    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
> [    4.644852 ] dfa0:                                     00000000
> 00000000 00000000 00000000
> [    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000 00000000
> [    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
> [    4.667652 ] irq event stamp: 145160
> [    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>]
> _raw_spin_unlock_irqrestore+0x30/0x58
> [    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>]
> _raw_spin_lock_irqsave+0x1c/0x98
> [    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>]
> __do_softirq+0x2a4/0x420
> [    4.696267 ] softirqs last disabled at (145041): [<c011fb80>]
> irq_exit+0x1a4/0x1a8
> [    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
> [    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01:
> attached PHY driver [Micrel KSZ8081 or KSZ8091]
> (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
> [    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at
> 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
> [    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    4.852778 ] ehci-atmel: EHCI Atmel driver
> [    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
> [    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned
> bus number 1
> [    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
> [    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
> [    4.919898 ] usb usb1: New USB device found, idVendor=1d6b,
> idProduct=0002, bcdDevice= 4.19
> [    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    4.935857 ] usb usb1: Product: EHCI Host Controller
> [    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
> [    4.946377 ] usb usb1: SerialNumber: 600000.ehci
> [    4.960887 ] hub 1-0:1.0: USB hub found
> [    4.967182 ] hub 1-0:1.0: 3 ports detected
> [    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [    4.988376 ] ohci-atmel: OHCI Atmel driver
> [    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
> [    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned
> bus number 2
> [    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
> [    5.091134 ] usb usb2: New USB device found, idVendor=1d6b,
> idProduct=0001, bcdDevice= 4.19
> [    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    5.106711 ] usb usb2: Product: USB Host Controller
> [    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
> [    5.117146 ] usb usb2: SerialNumber: at91
> [    5.127252 ] hub 2-0:1.0: USB hub found
> [    5.133470 ] hub 2-0:1.0: 3 ports detected
> [    5.150121 ] usbcore: registered new interface driver cdc_acm
> [    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems
> and ISDN adapters
> [    5.164776 ] usbcore: registered new interface driver usb-storage
> [    5.171788 ] usbcore: registered new interface driver usbserial_generic
> [    5.179229 ] usbserial: USB Serial support registered for generic
> [    5.185995 ] usbcore: registered new interface driver ftdi_sio
> [    5.192157 ] usbserial: USB Serial support registered for FTDI USB
> Serial Device
> [    5.199977 ] usbcore: registered new interface driver pl2303
> [    5.205993 ] usbserial: USB Serial support registered for pl2303
> [    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem
> 0xfc02c000-0xfc02ffff] mapped at (ptrval)
> [    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem
> 0x00400000-0x004fffff] mapped at (ptrval)
> [    5.265577 ] g_serial gadget: Gadget Serial v2.4
> [    5.270268 ] g_serial gadget: g_serial ready
> [    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
> [    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
> [    5.298694 ] i2c /dev entries driver
> [    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
> [    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16
> sec, nowayout = 0)
> [    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
> [    5.363573 ] sdhci: Copyright(c) Pierre Ossman
> [    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
> [    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
> [    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
> [    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
> [    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000
> irq 28, 1 slots
> [    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
> [    5.454821 ] atmel_aes fc044000.aes: version: 0x201
> [    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0,
> dma1chan1 for DMA transfers
> [    5.495328 ] atmel_sha fc050000.sha: version: 0x420
> [    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
> [    5.516378 ] atmel_sha fc050000.sha: Atmel
> SHA1/SHA256/SHA224/SHA384/SHA512
> [    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
> [    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for
> DMA transfers
> [    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
> [    5.566514 ] usbcore: registered new interface driver usbhid
> [    5.572227 ] usbhid: USB HID core driver
> [    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
> [    5.602958 ] nand: Micron MT29F4G08ABAEAWP
> [    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096,
> OOB size: 224
> [    5.622318 ] Bad block table not found for chip 0
> [    5.629946 ] Bad block table not found for chip 0
> [    5.634709 ] Scanning device for bad blocks
> [    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
> [    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
> [    6.124797 ] 6 fixed-partitions partitions found on MTD device
> atmel_nand
> [    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
> [    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
> [    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
> [    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
> [    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
> [    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
> [    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
> [    6.336391 ] iio iio:device0: Resolution used: 10 bits
> [    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
> [    6.396804 ] NET: Registered protocol family 10
> [    6.418370 ] Segment Routing with IPv6
> [    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [    6.434188 ] NET: Registered protocol family 17
> [    6.452130 ] Loading compiled-in X.509 certificates
> [    6.565366 ] input: gpio_keys as
> /devices/platform/gpio_keys/input/input0
> [    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02
> 07:59:53 UTC (1325491193)
> [    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [   16.620548 ] Waiting up to 110 more seconds for network.
>
> One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
> 4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
> it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
> same family.
>
> Any suggestions on how to narrow the root case of that freeze will be
> greatly appreciated.
>
> Best regards,
> Vladimir Petrigo
>
> The back trace in the log means that this chip hasn't been fully ported to
the ipipe kernel and is missing the flag to identify the gpiochip as
pipeline safe.   It is possible the ipipe kernel hasn't been ported
properly to this target.  Check the gpio driver and irq chip driver and the
timer driver to see if they have any ipipe related code.  It's possible
this target was supported by older ipipe versions but wasn't fully ported
to a recent version of the ipipe.  I'll check tonight when I get a chance
to confirm if this target has support.

-Greg

^ permalink raw reply	[flat|nested] 9+ messages in thread

* ATSAMA5D4 Xplained freeze with Xenomai kernel
@ 2021-03-01 14:41 Vladimir Petrigo
  2021-03-01 15:02 ` Greg Gallagher
  0 siblings, 1 reply; 9+ messages in thread
From: Vladimir Petrigo @ 2021-03-01 14:41 UTC (permalink / raw)
  To: xenomai


Hello,

I met an issue with running Linux Kernel 4.19.144 with Xenomai 3.1 on
ATSAMA5D4 Xplained board.

Preliminary:
- non-patched Linux kernel 4.19.144 works just fine
- I-pipe patched kernel can successfully boot
- when I insert an ethernet cable into the on-board ethernet port, the
  kernel freezes and the reset is the only solution to get out of that
  state. Without the ethernet cable inserted the kernel will work
  indefinitely long trying to reach the network and obtain an IP address.
  So I assume something may be wrong with Micrel KSZ8081 driver under
  Xenomai

Here is the boot log:

[    0.000000 ] Booting Linux on physical CPU 0x0
[    0.000000 ] Linux version 4.19.144 (vpetrigo@localhost.localdomain) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05)) #6 Sun Feb 28 07:27:15 MSK 2021
[    0.000000 ] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c53c7d
[    0.000000 ] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000 ] OF: fdt: Machine model: Atmel SAMA5D4 Xplained
[    0.000000 ] Memory policy: Data cache writeback
[    0.000000 ] CPU: All CPU(s) started in SVC mode.
[    0.000000 ] random: get_random_bytes called from start_kernel+0x94/0x488 with crng_init=0
[    0.000000 ] Built 1 zonelists, mobility grouping on.  Total pages: 130048
[    0.000000 ] Kernel command line: console=ttyS0,115200 root=/dev/nfs ip=dhcp nfsroot=10.24.1.163:/home/user/nfsroot_xenomai,nfsvers=3 rw
[    0.000000 ] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000 ] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000 ] Memory: 498560K/524288K available (7168K kernel code, 1957K rwdata, 2404K rodata, 1024K init, 7808K bss, 25728K reserved, 0K cma-reserved)
[    0.000000 ] Virtual kernel memory layout:
[    0.000000 ]     vector  : 0xffff0000 - 0xffff1000   (   4 kB )
[    0.000000 ]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000 ]     vmalloc : 0xe0800000 - 0xff800000   ( 496 MB )
[    0.000000 ]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB )
[    0.000000 ]     modules : 0xbf000000 - 0xc0000000   (  16 MB )
[    0.000000 ]       .text : 0x(ptrval) - 0x(ptrval)   (8160 kB)
[    0.000000 ]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
[    0.000000 ]       .data : 0x(ptrval) - 0x(ptrval)   (1958 kB)
[    0.000000 ]        .bss : 0x(ptrval) - 0x(ptrval)   (7809 kB)
[    0.000000 ] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000 ] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA.
[    0.000000 ] L2C: I-pipe: write-allocate enabled, induces high latencies.
[    0.000000 ] L2C-310 ID prefetch enabled, offset 2 lines
[    0.000000 ] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000 ] L2C-310 cache controller enabled, 8 ways, 128 kB
[    0.000000 ] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
[    0.000000 ] clocksource: timer@fc024000: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 152900835740 ns
[    0.000025 ] sched_clock: 32 bits at 12MHz, resolution 80ns, wraps every 171798691800ns
[    0.000098 ] I-pipe, 12.500 MHz clocksource, wrap in 343597 ms
[    0.000171 ] clocksource: ipipe_tsc: mask: 0xffffffffffffffff max_cycles: 0x2e2049cda, max_idle_ns: 440795202628 ns
[    0.000627 ] Interrupt pipeline (release #10)
[    0.002773 ] console [rawcon-1] enabled
[    0.003252 ] Console: colour dummy device 80x30
[    0.003373 ] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[    0.003433 ] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.003489 ] ... MAX_LOCK_DEPTH:          48
[    0.003544 ] ... MAX_LOCKDEP_KEYS:        8191
[    0.003599 ] ... CLASSHASH_SIZE:          4096
[    0.003654 ] ... MAX_LOCKDEP_ENTRIES:     32768
[    0.003708 ] ... MAX_LOCKDEP_CHAINS:      65536
[    0.003762 ] ... CHAINHASH_SIZE:          32768
[    0.003818 ]  memory used by lock dependency info: 4911 kB
[    0.003873 ]  per task-struct memory footprint: 2304 bytes
[    0.003928 ] ------------------------
[    0.003981 ] | Locking API testsuite:
[    0.004036 ] ----------------------------------------------------------------------------
[    0.004092 ]                                  | spin |wlock |rlock |mutex | wsem | rsem |
[    0.004146 ]   --------------------------------------------------------------------------
[    0.004227 ]                      A-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.030501 ]                  A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.056917 ]              A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.084175 ]              A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.111455 ]          A-B-B-C-C-D-D-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.139317 ]          A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.167367 ]          A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.195545 ]                     double unlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.221539 ]                   initialize held:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.247217 ]   --------------------------------------------------------------------------
[    0.247280 ]               recursive read-lock:             |  ok  |             |  ok  |
[    0.254871 ]            recursive read-lock #2:             |  ok  |             |  ok  |
[    0.262417 ]             mixed read-write-lock:             |  ok  |             |  ok  |
[    0.269870 ]             mixed write-read-lock:             |  ok  |             |  ok  |
[    0.277482 ]   mixed read-lock/lock-write ABBA:             |FAILED|             |  ok  |
[    0.285245 ]    mixed read-lock/lock-read ABBA:             |  ok  |             |  ok  |
[    0.292993 ]  mixed write-lock/lock-write ABBA:             |  ok  |             |  ok  |
[    0.300789 ]   --------------------------------------------------------------------------
[    0.300909 ]      hard-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
[    0.312104 ]      soft-irqs-on + irq-safe-A/12:  ok  |  ok  |  ok  |
[    0.323324 ]      hard-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
[    0.334565 ]      soft-irqs-on + irq-safe-A/21:  ok  |  ok  |  ok  |
[    0.345788 ]        sirq-safe-A => hirqs-on/12:  ok  |  ok  |  ok  |
[    0.357017 ]        sirq-safe-A => hirqs-on/21:  ok  |  ok  |  ok  |
[    0.368254 ]          hard-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
[    0.379449 ]          soft-safe-A + irqs-on/12:  ok  |  ok  |  ok  |
[    0.390842 ]          hard-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
[    0.402048 ]          soft-safe-A + irqs-on/21:  ok  |  ok  |  ok  |
[    0.413277 ]     hard-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
[    0.424797 ]     soft-safe-A + unsafe-B #1/123:  ok  |  ok  |  ok  |
[    0.436310 ]     hard-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
[    0.447804 ]     soft-safe-A + unsafe-B #1/132:  ok  |  ok  |  ok  |
[    0.459297 ]     hard-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
[    0.470949 ]     soft-safe-A + unsafe-B #1/213:  ok  |  ok  |  ok  |
[    0.482470 ]     hard-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
[    0.493936 ]     soft-safe-A + unsafe-B #1/231:  ok  |  ok  |  ok  |
[    0.505431 ]     hard-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
[    0.516720 ]     soft-safe-A + unsafe-B #1/312:  ok  |  ok  |  ok  |
[    0.528051 ]     hard-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
[    0.539497 ]     soft-safe-A + unsafe-B #1/321:  ok  |  ok  |  ok  |
[    0.551125 ]     hard-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
[    0.562559 ]     soft-safe-A + unsafe-B #2/123:  ok  |  ok  |  ok  |
[    0.574098 ]     hard-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
[    0.585509 ]     soft-safe-A + unsafe-B #2/132:  ok  |  ok  |  ok  |
[    0.597028 ]     hard-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
[    0.608483 ]     soft-safe-A + unsafe-B #2/213:  ok  |  ok  |  ok  |
[    0.620143 ]     hard-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
[    0.631548 ]     soft-safe-A + unsafe-B #2/231:  ok  |  ok  |  ok  |
[    0.643026 ]     hard-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
[    0.654479 ]     soft-safe-A + unsafe-B #2/312:  ok  |  ok  |  ok  |
[    0.666010 ]     hard-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
[    0.677443 ]     soft-safe-A + unsafe-B #2/321:  ok  |  ok  |  ok  |
[    0.688935 ]       hard-irq lock-inversion/123:  ok  |  ok  |  ok  |
[    0.700545 ]       soft-irq lock-inversion/123:  ok  |  ok  |  ok  |
[    0.712073 ]       hard-irq lock-inversion/132:  ok  |  ok  |  ok  |
[    0.723503 ]       soft-irq lock-inversion/132:  ok  |  ok  |  ok  |
[    0.735070 ]       hard-irq lock-inversion/213:  ok  |  ok  |  ok  |
[    0.746557 ]       soft-irq lock-inversion/213:  ok  |  ok  |  ok  |
[    0.758105 ]       hard-irq lock-inversion/231:  ok  |  ok  |  ok  |
[    0.769555 ]       soft-irq lock-inversion/231:  ok  |  ok  |  ok  |
[    0.781215 ]       hard-irq lock-inversion/312:  ok  |  ok  |  ok  |
[    0.792655 ]       soft-irq lock-inversion/312:  ok  |  ok  |  ok  |
[    0.804238 ]       hard-irq lock-inversion/321:  ok  |  ok  |  ok  |
[    0.815691 ]       soft-irq lock-inversion/321:  ok  |  ok  |  ok  |
[    0.827212 ]       hard-irq read-recursion/123:  ok  |
[    0.831217 ]       soft-irq read-recursion/123:  ok  |
[    0.835119 ]       hard-irq read-recursion/132:  ok  |
[    0.838973 ]       soft-irq read-recursion/132:  ok  |
[    0.843002 ]       hard-irq read-recursion/213:  ok  |
[    0.846878 ]       soft-irq read-recursion/213:  ok  |
[    0.850910 ]       hard-irq read-recursion/231:  ok  |
[    0.854788 ]       soft-irq read-recursion/231:  ok  |
[    0.858666 ]       hard-irq read-recursion/312:  ok  |
[    0.862667 ]       soft-irq read-recursion/312:  ok  |
[    0.866570 ]       hard-irq read-recursion/321:  ok  |
[    0.870572 ]       soft-irq read-recursion/321:  ok  |
[    0.874467 ]   --------------------------------------------------------------------------
[    0.874526 ]   | Wound/wait tests |
[    0.874581 ]   ---------------------
[    0.874636 ]                   ww api failures:  ok  |  ok  |  ok  |
[    0.886288 ]                ww contexts mixing:  ok  |  ok  |
[    0.893957 ]              finishing ww context:  ok  |  ok  |  ok  |  ok  |
[    0.908956 ]                locking mismatches:  ok  |  ok  |  ok  |
[    0.920501 ]                  EDEADLK handling:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
[    0.959308 ]            spinlock nest unlocked:  ok  |
[    0.963226 ]   -----------------------------------------------------
[    0.963284 ]                                  |block | try  |context|
[    0.963340 ]   -----------------------------------------------------
[    0.963397 ]                           context:  ok  |  ok  |  ok  |
[    0.975060 ]                               try:  ok  |  ok  |  ok  |
[    0.986408 ]                             block:  ok  |  ok  |  ok  |
[    0.997801 ]                          spinlock:  ok  |  ok  |  ok  |
[    1.009546 ] -------------------------------------------------------
[    1.009607 ] Good, all 261 testcases passed! |
[    1.009661 ] ---------------------------------
[    1.009833 ] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
[    1.060146 ] pid_max: default: 32768 minimum: 301
[    1.061258 ] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    1.061351 ] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    1.067206 ] CPU: Testing write buffer coherency: ok
[    1.073824 ] Setting up static identity map for 0x20100000 - 0x20100060
[    1.082477 ] devtmpfs: initialized
[    1.179711 ] VFP support v0.3: implementor 41 architecture 2 part 30 variant 5 rev 1
[    1.181846 ] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    1.182029 ] futex hash table entries: 256 (order: 1, 13312 bytes)
[    1.183030 ] pinctrl core: initialized pinctrl subsystem
[    1.206526 ] NET: Registered protocol family 16
[    1.209115 ] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    1.333722 ] AT91: PM: standby: standby, suspend: ulp0
[    1.333809 ] No ATAGs?
[    1.396433 ] gpio-at91 fc06a000.gpio: at address (ptrval)
[    1.404459 ] gpio-at91 fc06b000.gpio: at address (ptrval)
[    1.412867 ] gpio-at91 fc06c000.gpio: at address (ptrval)
[    1.420940 ] gpio-at91 fc068000.gpio: at address (ptrval)
[    1.428819 ] gpio-at91 fc06d000.gpio: at address (ptrval)
[    1.439623 ] pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91 pinctrl driver
[    1.704025 ] at_xdmac f0004000.dma-controller: 16 channels, mapped at 0x(ptrval)
[    1.718712 ] at_xdmac f0014000.dma-controller: 16 channels, mapped at 0x(ptrval)
[    1.721621 ] AT91: Detected SoC family: sama5d4
[    1.721704 ] AT91: Detected SoC: sama5d44, revision 0
[    1.726407 ] VDD MCI1: supplied by VCC 3V3
[    1.732481 ] SCSI subsystem initialized
[    1.735296 ] usbcore: registered new interface driver usbfs
[    1.736049 ] usbcore: registered new interface driver hub
[    1.736561 ] usbcore: registered new device driver usb
[    1.741715 ] at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1 (rx) for DMA transfers
[    1.744267 ] at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version: 0x502).
[    1.746533 ] videodev: Linux video capture interface: v2.00
[    1.746981 ] pps_core: LinuxPPS API ver. 1 registered
[    1.747048 ] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    1.747288 ] PTP clock support registered
[    1.750240 ] Advanced Linux Sound Architecture Driver Initialized.
[    1.840365 ] clocksource: Switched to clocksource ipipe_tsc
[    2.574436 ] NET: Registered protocol family 2
[    2.578276 ] tcp_listen_portaddr_hash hash table entries: 256 (order: 1, 12288 bytes)
[    2.578494 ] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[    2.578700 ] TCP bind hash table entries: 4096 (order: 5, 180224 bytes)
[    2.580220 ] TCP: Hash tables configured (established 4096 bind 4096)
[    2.581477 ] UDP hash table entries: 256 (order: 2, 24576 bytes)
[    2.581815 ] UDP-Lite hash table entries: 256 (order: 2, 24576 bytes)
[    2.583098 ] NET: Registered protocol family 1
[    2.591094 ] RPC: Registered named UNIX socket transport module.
[    2.591298 ] RPC: Registered udp transport module.
[    2.591371 ] RPC: Registered tcp transport module.
[    2.591439 ] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    2.602326 ] [Xenomai] scheduling class idle registered.
[    2.602406 ] [Xenomai] scheduling class rt registered.
[    2.603891 ] I-pipe: head domain Xenomai registered.
[    2.638900 ] [Xenomai] Cobalt v3.1 [DEBUG]
[    2.638984 ] Initialise system trusted keyrings
[    2.641641 ] workingset: timestamp_bits=30 max_order=17 bucket_order=0
[    2.687431 ] Key type asymmetric registered
[    2.687813 ] Asymmetric key parser 'x509' registered
[    2.688226 ] io scheduler noop registered (default)
[    2.688308 ] io scheduler mq-deadline registered
[    2.688376 ] io scheduler kyber registered
[    2.731441 ] f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 23, base_baud = 6250000) is a ATMEL_SERIAL
[    2.739919 ] fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 29, base_baud = 6250000) is a ATMEL_SERIAL
[    3.756264 ] random: fast init done
[    4.064725 ] console [ttyS0] enabled
[    4.073147 ] fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 30, base_baud = 6250000) is a ATMEL_SERIAL
[    4.143473 ] brd: module loaded
[    4.256253 ] loop: module loaded
[    4.273495 ] atmel_spi f8010000.spi: Using dma0chan2 (tx) and dma0chan3 (rx) for DMA transfers
[    4.309313 ] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 00, 00
[    4.316754 ] atmel_spi f8010000.spi: Atmel SPI Controller version 0x221 at 0xf8010000 (irq 24)
[    4.328335 ] atmel_spi fc018000.spi: Using dma0chan4 (tx) and dma0chan5 (rx) for DMA transfers
[    4.343044 ] atmel_spi fc018000.spi: Atmel SPI Controller version 0x221 at 0xfc018000 (irq 31)
[    4.356675 ] libphy: Fixed MDIO Bus: probed
[    4.369182 ] libphy: MACB_mii_bus: probed
[    4.399395 ] ------------[ cut here  ]------------
[    4.404217 ] WARNING: CPU: 0 PID: 1 at kernel/irq/chip.c:55 irq_set_chip+0xbc/0xcc
[    4.411649 ] irqchip GPIO is not pipeline-safe!
[    4.411660 ] Modules linked in:
[    4.419088 ] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.144 #6
[    4.424953 ] Hardware name: Atmel SAMA5
[    4.428667 ] I-pipe domain: Linux
[    4.431893 ] [<c010f200>] (unwind_backtrace) from [<c010c5a4>] (show_stack+0x10/0x14)
[    4.439597 ] [<c010c5a4>] (show_stack) from [<c011b3cc>] (__warn+0xf4/0x10c)
[    4.446515 ] [<c011b3cc>] (__warn) from [<c011b42c>] (warn_slowpath_fmt+0x48/0x6c)
[    4.453949 ] [<c011b42c>] (warn_slowpath_fmt) from [<c0169a60>] (irq_set_chip+0xbc/0xcc)
[    4.461908 ] [<c0169a60>] (irq_set_chip) from [<c016aae0>] (irq_set_chip_and_handler_name+0x14/0x2c)
[    4.470910 ] [<c016aae0>] (irq_set_chip_and_handler_name) from [<c0433700>] (gpiochip_irq_map+0x8c/0x130)
[    4.480340 ] [<c0433700>] (gpiochip_irq_map) from [<c016ceb4>] (irq_domain_associate+0x74/0x1ec)
[    4.488996 ] [<c016ceb4>] (irq_domain_associate) from [<c016d6fc>] (irq_create_mapping+0x64/0xc8)
[    4.497731 ] [<c016d6fc>] (irq_create_mapping) from [<c016d8e4>] (irq_create_fwspec_mapping+0x184/0x2c4)
[    4.507070 ] [<c016d8e4>] (irq_create_fwspec_mapping) from [<c016da80>] (irq_create_of_mapping+0x5c/0x78)
[    4.516497 ] [<c016da80>] (irq_create_of_mapping) from [<c0630ca4>] (of_irq_get+0x6c/0xb8)
[    4.524622 ] [<c0630ca4>] (of_irq_get) from [<c06313f8>] (of_mdiobus_register_phy+0x84/0x17c)
[    4.533011 ] [<c06313f8>] (of_mdiobus_register_phy) from [<c06319b8>] (of_mdiobus_register+0xf4/0x304)
[    4.542182 ] [<c06319b8>] (of_mdiobus_register) from [<c0564478>] (macb_probe+0x72c/0xad0)
[    4.550315 ] [<c0564478>] (macb_probe) from [<c04e17e4>] (platform_drv_probe+0x48/0x98)
[    4.558192 ] [<c04e17e4>] (platform_drv_probe) from [<c04df934>] (really_probe+0x1d8/0x2c0)
[    4.566406 ] [<c04df934>] (really_probe) from [<c04dfb80>] (driver_probe_device+0x60/0x160)
[    4.574622 ] [<c04dfb80>] (driver_probe_device) from [<c04dfd68>] (__driver_attach+0xe8/0xec)
[    4.583010 ] [<c04dfd68>] (__driver_attach) from [<c04ddbe4>] (bus_for_each_dev+0x74/0xb4)
[    4.591141 ] [<c04ddbe4>] (bus_for_each_dev) from [<c04ded6c>] (bus_add_driver+0x18c/0x210)
[    4.599358 ] [<c04ded6c>] (bus_add_driver) from [<c04e0948>] (driver_register+0x7c/0x114)
[    4.607405 ] [<c04e0948>] (driver_register) from [<c0102e94>] (do_one_initcall+0x88/0x22c)
[    4.615538 ] [<c0102e94>] (do_one_initcall) from [<c0b010ac>] (kernel_init_freeable+0x26c/0x304)
[    4.624188 ] [<c0b010ac>] (kernel_init_freeable) from [<c07b87ac>] (kernel_init+0x8/0x108)
[    4.632321 ] [<c07b87ac>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x18/0x24)
[    4.639832 ] Exception stack(0xdf48dfb0 to 0xdf48dff8)
[    4.644852 ] dfa0:                                     00000000 00000000 00000000 00000000
[    4.652978 ] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    4.661096 ] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    4.667652 ] irq event stamp: 145160
[    4.671121 ] hardirqs last  enabled at (145159): [<c07c01cc>] _raw_spin_unlock_irqrestore+0x30/0x58
[    4.680024 ] hardirqs last disabled at (145160): [<c07c0018>] _raw_spin_lock_irqsave+0x1c/0x98
[    4.688491 ] softirqs last  enabled at (145050): [<c01026ac>] __do_softirq+0x2a4/0x420
[    4.696267 ] softirqs last disabled at (145041): [<c011fb80>] irq_exit+0x1a4/0x1a8
[    4.703786 ] ---[ end trace 56205b4a18caa7d4  ]---
[    4.819300 ] Micrel KSZ8081 or KSZ8091 f8020000.ethernet-ffffffff:01: attached PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=f8020000.ethernet-ffffffff:01, irq=46)
[    4.834944 ] macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at 0xf8020000 irq 27 (fc:c2:3d:0c:65:90)
[    4.846097 ] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    4.852778 ] ehci-atmel: EHCI Atmel driver
[    4.861644 ] atmel-ehci 600000.ehci: EHCI Host Controller
[    4.867577 ] atmel-ehci 600000.ehci: new USB bus registered, assigned bus number 1
[    4.876463 ] atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
[    4.910590 ] atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
[    4.919898 ] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[    4.928522 ] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.935857 ] usb usb1: Product: EHCI Host Controller
[    4.940847 ] usb usb1: Manufacturer: Linux 4.19.144 ehci_hcd
[    4.946377 ] usb usb1: SerialNumber: 600000.ehci
[    4.960887 ] hub 1-0:1.0: USB hub found
[    4.967182 ] hub 1-0:1.0: 3 ports detected
[    4.982082 ] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    4.988376 ] ohci-atmel: OHCI Atmel driver
[    4.995613 ] at91_ohci 500000.ohci: USB Host Controller
[    5.001142 ] at91_ohci 500000.ohci: new USB bus registered, assigned bus number 2
[    5.009408 ] at91_ohci 500000.ohci: irq 18, io mem 0x00500000
[    5.091134 ] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001, bcdDevice= 4.19
[    5.099363 ] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    5.106711 ] usb usb2: Product: USB Host Controller
[    5.111612 ] usb usb2: Manufacturer: Linux 4.19.144 ohci_hcd
[    5.117146 ] usb usb2: SerialNumber: at91
[    5.127252 ] hub 2-0:1.0: USB hub found
[    5.133470 ] hub 2-0:1.0: 3 ports detected
[    5.150121 ] usbcore: registered new interface driver cdc_acm
[    5.156024 ] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[    5.164776 ] usbcore: registered new interface driver usb-storage
[    5.171788 ] usbcore: registered new interface driver usbserial_generic
[    5.179229 ] usbserial: USB Serial support registered for generic
[    5.185995 ] usbcore: registered new interface driver ftdi_sio
[    5.192157 ] usbserial: USB Serial support registered for FTDI USB Serial Device
[    5.199977 ] usbcore: registered new interface driver pl2303
[    5.205993 ] usbserial: USB Serial support registered for pl2303
[    5.215163 ] atmel_usba_udc 400000.gadget: MMIO registers at [mem 0xfc02c000-0xfc02ffff] mapped at (ptrval)
[    5.225147 ] atmel_usba_udc 400000.gadget: FIFO at [mem 0x00400000-0x004fffff] mapped at (ptrval)
[    5.265577 ] g_serial gadget: Gadget Serial v2.4
[    5.270268 ] g_serial gadget: g_serial ready
[    5.285798 ] at91_rtc fc0686b0.rtc: registered as rtc0
[    5.292183 ] at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
[    5.298694 ] i2c /dev entries driver
[    5.316626 ] at91-reset fc068600.rstc: Starting after user reset
[    5.345811 ] sama5d4_wdt fc068640.watchdog: initialized (timeout = 16 sec, nowayout = 0)
[    5.357226 ] sdhci: Secure Digital Host Controller Interface driver
[    5.363573 ] sdhci: Copyright(c) Pierre Ossman
[    5.370573 ] atmel_mci fc000000.mmc: version: 0x600
[    5.375899 ] atmel_mci fc000000.mmc: using dma0chan6 for DMA transfers
[    5.384347 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.2
[    5.392309 ] atmel_mci fc000000.mmc: Linked as a consumer to regulator.1
[    5.428632 ] atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000 irq 28, 1 slots
[    5.437757 ] sdhci-pltfm: SDHCI platform and OF driver helper
[    5.454821 ] atmel_aes fc044000.aes: version: 0x201
[    5.484410 ] atmel_aes fc044000.aes: Atmel AES - Using dma1chan0, dma1chan1 for DMA transfers
[    5.495328 ] atmel_sha fc050000.sha: version: 0x420
[    5.500916 ] atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
[    5.516378 ] atmel_sha fc050000.sha: Atmel SHA1/SHA256/SHA224/SHA384/SHA512
[    5.525735 ] atmel_tdes fc04c000.tdes: version: 0x702
[    5.532028 ] atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for DMA transfers
[    5.559571 ] atmel_tdes fc04c000.tdes: Atmel DES/TDES
[    5.566514 ] usbcore: registered new interface driver usbhid
[    5.572227 ] usbhid: USB HID core driver
[    5.596339 ] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
[    5.602958 ] nand: Micron MT29F4G08ABAEAWP
[    5.606941 ] nand: 512 MiB, SLC, erase size: 256 KiB, page size: 4096, OOB size: 224
[    5.622318 ] Bad block table not found for chip 0
[    5.629946 ] Bad block table not found for chip 0
[    5.634709 ] Scanning device for bad blocks
[    6.108560 ] Bad block table written to 0x00001ffc0000, version 0x01
[    6.117397 ] Bad block table written to 0x00001ff80000, version 0x01
[    6.124797 ] 6 fixed-partitions partitions found on MTD device atmel_nand
[    6.131671 ] Creating 6 MTD partitions on "atmel_nand":
[    6.136838 ] 0x000000000000-0x000000040000 : "at91bootstrap"
[    6.160213 ] 0x000000040000-0x0000000c0000 : "bootloader"
[    6.180001 ] 0x0000000c0000-0x000000180000 : "bootloader env"
[    6.199980 ] 0x000000180000-0x000000200000 : "device tree"
[    6.219709 ] 0x000000200000-0x000000800000 : "kernel"
[    6.239856 ] 0x000000800000-0x000020000000 : "rootfs"
[    6.336391 ] iio iio:device0: Resolution used: 10 bits
[    6.341881 ] iio iio:device0: ADC Touch screen is disabled.
[    6.396804 ] NET: Registered protocol family 10
[    6.418370 ] Segment Routing with IPv6
[    6.422610 ] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    6.434188 ] NET: Registered protocol family 17
[    6.452130 ] Loading compiled-in X.509 certificates
[    6.565366 ] input: gpio_keys as /devices/platform/gpio_keys/input/input0
[    6.581088 ] at91_rtc fc0686b0.rtc: setting system clock to 2012-01-02 07:59:53 UTC (1325491193)
[    6.600987 ] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.620548 ] Waiting up to 110 more seconds for network.

One of Bootlin's courses has ATSAMA5D3 Xplained board with mentions that
4.19.144 kernel with I-pipe patch should work fine. So I am wondering why
it may get stuck on ATSAMA5D4 Xplained since SAMA5D3 and SAMA5D4 is the
same family.

Any suggestions on how to narrow the root case of that freeze will be
greatly appreciated.

Best regards,
Vladimir Petrigo


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2021-03-04  0:54 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-01 14:39 ATSAMA5D4 Xplained freeze with Xenomai kernel Vladimir Petrigo
2021-03-01 14:41 Vladimir Petrigo
2021-03-01 15:02 ` Greg Gallagher
2021-03-01 20:45   ` Vladimir Petrigo
2021-03-02  6:21     ` Greg Gallagher
2021-03-02  9:37     ` Philippe Gerum
2021-03-03  0:33       ` Vladimir Petrigo
2021-03-03  9:48         ` Philippe Gerum
2021-03-04  0:54           ` Vladimir Petrigo

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