kernel BUG at arch/powerpc/kernel/smp.c:370 Oops: Exception in kernel mode, sig: 5 [#1]

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kernel BUG at arch/powerpc/kernel/smp.c:370 Oops: Exception in kernel mode, sig: 5 [#1]

Contributor I

Dear all,

While loading the compiled QorIQ-SDK-V1.2-20120614-yocto linux kernel module on p1021 (2C, 900M) based board running linux kernel uImage, rootfs fsl-image and device tree dtb, I got below exception.

I have tried to trace the bug in smp.c file.

The bug is on "BUG_ON( smp_processor_id() != boot_cpuid )"

And I printk the value of smp_processor_id() and boot_cpuid. 

smp_processor_id() = 0, boot_cpuid = -1

=> bootm 1000000 2000000 c00000
WARNING: adjusting available memory to 30000000
## Booting kernel from Legacy Image at 01000000 ...
Image Name: Linux-3.0.34-rt55-02404-g1a39570
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3615574 Bytes = 3.4 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 02000000 ...
Image Name: fsl-image-minimal-p1021rdb-20180
Image Type: PowerPC Linux RAMDisk Image (gzip compressed)
Data Size: 4170707 Bytes = 4 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 00c00000
Booting using the fdt blob at 0xc00000
Uncompressing Kernel Image ... OK
Loading Ramdisk to 2fc05000, end 2ffff3d3 ... OK
Using P1021 RDB-PC machine description
Memory CAM mapping: 256/256/256 Mb, residual: 256Mb
Linux version 3.0.34-rt55-02404-g1a39570 (diag@diag) (gcc version 4.6.2 (GCC) ) #1 SMP Tue Sep 18 05:30:38 CST 2018
Found initrd at 0xefc05000:0xeffff3d3
CPU maps initialized for 1 thread per core
bootconsole [udbg0] enabled
setup_arch: bootmem
Found FSL PCI host bridge at 0x00000000ffe09000. Firmware bus number: 0->255
PCI host bridge /pcie@ffe09000 ranges:
MEM 0x00000000a0000000..0x00000000bfffffff -> 0x00000000a0000000
IO 0x00000000ffc10000..0x00000000ffc1ffff -> 0x0000000000000000
/pcie@ffe09000: PCICSRBAR @ 0xfff00000
Found FSL PCI host bridge at 0x00000000ffe0a000. Firmware bus number: 0->255
PCI host bridge /pcie@ffe0a000 ranges:
MEM 0x0000000080000000..0x000000009fffffff -> 0x0000000080000000
IO 0x00000000ffc00000..0x00000000ffc0ffff -> 0x0000000000000000
/pcie@ffe0a000: PCICSRBAR @ 0xfff00000
MPC85xx RDB board from Freescale Semiconductor
arch: exit
Zone PFN ranges:
DMA 0x00000000 -> 0x00030000
Normal empty
HighMem 0x00030000 -> 0x00040000
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
0: 0x00000000 -> 0x00040000
MMU: Allocated 894575148 bytes of context maps for -1052737408 contexts
PERCPU: Embedded 7 pages/cpu @c140b000 s4704 r8192 d15776 u32768
------------[ cut here ]------------
kernel BUG at arch/powerpc/kernel/smp.c:370!
Oops: Exception in kernel mode, sig: 5 [#1]
Modules linked in:
NIP: c04eaa64 LR: c069359c CTR: 00000000
REGS: c070bf10 TRAP: 0700 Not tainted (3.0.34-rt55-02404-g1a39570)
MSR: 00021000 <ME,CE> CR: 20242128 XER: 20000000
TASK = c06d93c0[0] 'swapper' THREAD: c070a000 CPU: 0
GPR00: 00000001 c070bfc0 c06d93c0 00000008 00000008 00000008 00000000 00000000
GPR08: ffffffff ffffffff 00000000 c070a000 40242128 006ca004 3ff73800 00000000
GPR16: c0000a00 00000014 3fffffff 00c00000 00000015 00000000 c070a000 00000000
GPR24: 00000000 00000000 000016e0 00000000 c1408100 c0711500 c07126f8 c06c2bd4
NIP [c04eaa64] smp_prepare_boot_cpu+0x20/0x40
LR [c069359c] start_kernel+0x10c/0x2fc
Call Trace:
[c070bfc0] [c0693598] start_kernel+0x108/0x2fc (unreliable)
[c070bff0] [c00003f8] skpinv+0x2e4/0x320
Instruction dump:
540a053e 380affff 7c0b492e 4e800020 542b0024 3d20c071 800b0008 81298da4
7d200278 7c000034 5400d97e 68000001 <0f000000> 3d60c071 80020008 5529103a
---[ end trace 31fd0ba7d8756001 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
Call Trace:
[c070bd00] [c00082c0] show_stack+0x4c/0x174 (unreliable)
[c070bd40] [c04e1b70] panic+0xa8/0x1dc
[c070bda0] [c005014c] do_exit+0x6a4/0x6c4
[c070bdf0] [c000af68] die+0xe0/0x1cc
[c070be10] [c000b150] _exception+0xa4/0x120
[c070bf00] [c000f754] ret_from_except_full+0x0/0x4c
--- Exception: 700 at smp_prepare_boot_cpu+0x20/0x40
LR = start_kernel+0x10c/0x2fc
[c070bfc0] [c0693598] start_kernel+0x108/0x2fc (unreliable)
[c070bff0] [c00003f8] skpinv+0x2e4/0x320
Rebooting in 180 seconds..

Can someone guide me how to resolve this issue? What could be going wrong here?


Thanks for your help,

Best Regards, 


1 Reply

NXP TechSupport
NXP TechSupport

Hello Lin Hsin Han,

It looks there is problem with Kernel configuration file which you are using to build Linux Kernel uImage.

Please build Linux Kernel based on the default Kernel configuration file, please refer to the section "2.2.4 Configure and rebuild Kernel" in the document documents/sdk_documentation/pdf/sdk-user-manual.pdf provided in the ISO QorIQ-SDK-V1.2-SOURCE-20120614-yocto.iso.