Preemtp RT patch issue in Galcore for Kernel 3.10.9 for imx6q sabre SD with Yocto build

[shitijsah]

Hi,

Iam trying to run the patched kernel 3.10.9. While loading Galcore I get Kernel Oops. Seems to be a problem with gpu-viv (may be physical to virtual mapping), without preempt rt patch no such issues. Below is the log

**************************************************************************************************************************

Galcore version 4.6.9.6622

------------[ cut here ]------------

WARNING: at mm/vmalloc.c:1482 gckOS_FreeMemory+0x34/0x50()

Trying to vfree() bad address (f4f7dff9)

Modules linked in:

CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.10.9-rt5-1.0.0_alpha+dbf364b #14

[<80013c4c>] (unwind_backtrace+0x0/0xf4) from [<80011618>] (show_stack+0x10/0x14)

[<80011618>] (show_stack+0x10/0x14) from [<800248b8>] (warn_slowpath_common+0x54/0x6c)

[<800248b8>] (warn_slowpath_common+0x54/0x6c) from [<80024900>] (warn_slowpath_fmt+0x30/0x40)

[<80024900>] (warn_slowpath_fmt+0x30/0x40) from [<80445cf8>] (gckOS_FreeMemory+0x34/0x50)

[<80445cf8>] (gckOS_FreeMemory+0x34/0x50) from [<80445d40>] (gckOS_Free+0x2c/0x3c)

[<80445d40>] (gckOS_Free+0x2c/0x3c) from [<80446044>] (gckOS_AtomDestroy+0x10/0x20)

[<80446044>] (gckOS_AtomDestroy+0x10/0x20) from [<8044ac8c>] (gckKERNEL_Construct+0x2c4/0x390)

[<8044ac8c>] (gckKERNEL_Construct+0x2c4/0x390) from [<804436e4>] (gckGALDEVICE_Construct+0x1b0/0x980)

[<804436e4>] (gckGALDEVICE_Construct+0x1b0/0x980) from [<80444dc8>] (gpu_probe+0x2f8/0x718)

[<80444dc8>] (gpu_probe+0x2f8/0x718) from [<802f8ed4>] (platform_drv_probe+0x18/0x1c)

[<802f8ed4>] (platform_drv_probe+0x18/0x1c) from [<802f7c58>] (driver_probe_device+0x10c/0x228)

[<802f7c58>] (driver_probe_device+0x10c/0x228) from [<802f7e44>] (__driver_attach+0x8c/0x90)

[<802f7e44>] (__driver_attach+0x8c/0x90) from [<802f6168>] (bus_for_each_dev+0x60/0x94)

[<802f6168>] (bus_for_each_dev+0x60/0x94) from [<802f741c>] (bus_add_driver+0x1c0/0x24c)

[<802f741c>] (bus_add_driver+0x1c0/0x24c) from [<802f842c>] (driver_register+0x78/0x140)

[<802f842c>] (driver_register+0x78/0x140) from [<80008704>] (do_one_initcall+0x108/0x158)

[<80008704>] (do_one_initcall+0x108/0x158) from [<80bcfbe0>] (kernel_init_freeable+0x138/0x1d4)

[<80bcfbe0>] (kernel_init_freeable+0x138/0x1d4) from [<805ff5e8>] (kernel_init+0x8/0x158)

[<805ff5e8>] (kernel_init+0x8/0x158) from [<8000e1d8>] (ret_from_fork+0x14/0x3c)

---[ end trace 0000000000000001 ]---

Unable to handle kernel paging request at virtual address 22e79e09

pgd = 80004000

[22e79e09] *pgd=00000000

Internal error: Oops: 5 [#1] PREEMPT SMP ARM

Modules linked in:

CPU: 2 PID: 1 Comm: swapper/0 Tainted: G        W    3.10.9-rt5-1.0.0_alpha+dbf364b #14

task: ac078000 ti: ac05a000 task.ti: ac05a000

PC is at del_timer+0x8/0x58

LR is at try_to_grab_pending+0x140/0x230

pc : [<80031d88>]    lr : [<8003cd7c>]    psr: 20000113

sp : ac05bd34  ip : 81500844  fp : ac4a3c00

r10: ac05a000  r9 : 00000001  r8 : ac05bd64

r7 : 22e79df9  r6 : 80c10840  r5 : 80c1f518  r4 : 22e79e09

r3 : 00000000  r2 : 008f0000  r1 : 00000000  r0 : 22e79e09

Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel

Control: 10c53c7d  Table: 1000404a  DAC: 00000015

Process swapper/0 (pid: 1, stack limit = 0xac05a238)

Stack: (0xac05bd34 to 0xac05c000)

bd20:                                              81500840 80c1f518 8003cd7c

bd40: 22e79df9 00000000 00000000 00000000 ac214f00 00000000 ac213500 8003cf38

bd60: 80aec944 00000000 00000000 ffffffff 00000000 80449a8c 00000000 8044aca0

bd80: 0000002a ac448f80 00000000 ac4a3c00 ac4a3c0c 02208000 00000000 0000002b

bda0: 0000002a 00000029 00000000 804436e4 ac4a3c04 ac05a010 60000113 00000000

bdc0: 00000000 00000000 00000001 00000001 00000000 00000000 00000000 00000000

bde0: 80bf7ee8 80c04f0c 00000000 8060476c 80b4e504 80c54204 80cbbe9c ac186c10

be00: ac186c00 ac44c5d0 80cbbe9c 00000030 00000000 80444dc8 00134000 00004000

be20: 0000002b 02204000 00004000 40b00000 08000000 00000000 ffffffff ffffffff

be40: 00000000 00000000 00000030 00000000 ac186c10 00000001 ac05be64 00000000

be60: ac121c40 00000000 ac186c10 80cb8974 ac186c10 00000000 80c54218 80c66980

be80: 80bf7ee8 80c04f0c 00000000 802f8ed4 802f8ebc 802f7c58 00000000 ac186c10

bea0: 80c54218 ac186c44 00000000 802f7e44 00000000 80c54218 802f7db8 802f6168

bec0: ac00446c ac15cb48 80c54218 ac448e80 80c3ccd0 802f741c 80b4e450 80c54218

bee0: 00000006 80c54218 00000006 80c66980 80c66980 802f842c 80c0fbac 00000006

bf00: 80c66980 80c66980 80c66980 80008704 000000ec 800413b8 ac05a038 ac05a010

bf20: 80b3bde0 80b9d428 00000006 00000006 80040c24 80040c7c ac05bf4c 80c0fbac

bf40: 00000006 80c66980 80c66980 80bcf4dc 000000ec 80c04f0c 80c04f00 80bcfbe0

bf60: 00000006 00000006 80bcf4dc efff17e3 0ffe06d5 771d9d4b ac05bf9c 00000000

bf80: 805ff5e0 00000000 00000000 00000000 00000000 00000000 00000000 805ff5e8

bfa0: 00000000 00000000 805ff5e0 8000e1d8 00000000 00000000 00000000 00000000

bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 e7b19bb1 7f102db7

[<80031d88>] (del_timer+0x8/0x58) from [<00000000>] (  (null))

Code: eb175f87 eaffffd7 e92d4030 e1a04000 (e5900000)

---[ end trace 0000000000000002 ]---

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

CPU3: stopping

CPU: 3 PID: 0 Comm: swapper/3 Tainted: G      D W    3.10.9-rt5-1.0.0_alpha+dbf364b #14

[<80013c4c>] (unwind_backtrace+0x0/0xf4) from [<80011618>] (show_stack+0x10/0x14)

[<80011618>] (show_stack+0x10/0x14) from [<80012e28>] (handle_IPI+0x108/0x160)

[<80012e28>] (handle_IPI+0x108/0x160) from [<80008584>] (gic_handle_irq+0x58/0x5c)

[<80008584>] (gic_handle_irq+0x58/0x5c) from [<8000dd00>] (__irq_svc+0x40/0x84)

Exception stack(0xac0a7fa0 to 0xac0a7fe8)

7fa0: ffffffed 008f8000 80c1fe8c 00000000 ac0a6000 80c1f2a4 8060e26c 80c667f5

7fc0: 00000001 80c667f5 00000000 00000000 00000000 ac0a7fe8 8000eda0 8000ed90

7fe0: 60000113 ffffffff

[<8000dd00>] (__irq_svc+0x40/0x84) from [<8000ed90>] (arch_cpu_idle+0x40/0x54)

[<8000ed90>] (arch_cpu_idle+0x40/0x54) from [<8005b344>] (cpu_startup_entry+0xfc/0x160)

[<8005b344>] (cpu_startup_entry+0xfc/0x160) from [<10601184>] (0x10601184)

CPU1: stopping

CPU: 1 PID: 0 Comm: swapper/1 Tainted: G      D W    3.10.9-rt5-1.0.0_alpha+dbf364b #14

[<80013c4c>] (unwind_backtrace+0x0/0xf4) from [<80011618>] (show_stack+0x10/0x14)

[<80011618>] (show_stack+0x10/0x14) from [<80012e28>] (handle_IPI+0x108/0x160)

[<80012e28>] (handle_IPI+0x108/0x160) from [<80008584>] (gic_handle_irq+0x58/0x5c)

[<80008584>] (gic_handle_irq+0x58/0x5c) from [<8000dd00>] (__irq_svc+0x40/0x84)

Exception stack(0xac0a3fa0 to 0xac0a3fe8)

3fa0: ffffffed 008e8000 80c1fe8c 00000000 ac0a2000 80c1f2a4 8060e26c 80c667f5

3fc0: 00000001 80c667f5 00000000 00000000 00000000 ac0a3fe8 8000eda0 8000ed90

3fe0: 60000113 ffffffff

[<8000dd00>] (__irq_svc+0x40/0x84) from [<8000ed90>] (arch_cpu_idle+0x40/0x54)

[<8000ed90>] (arch_cpu_idle+0x40/0x54) from [<8005b344>] (cpu_startup_entry+0xfc/0x160)

[<8005b344>] (cpu_startup_entry+0xfc/0x160) from [<10601184>] (0x10601184)

CPU0: stopping

CPU: 0 PID: 0 Comm: swapper/0 Tainted: G      D W    3.10.9-rt5-1.0.0_alpha+dbf364b #14

[<80013c4c>] (unwind_backtrace+0x0/0xf4) from [<80011618>] (show_stack+0x10/0x14)

[<80011618>] (show_stack+0x10/0x14) from [<80012e28>] (handle_IPI+0x108/0x160)

[<80012e28>] (handle_IPI+0x108/0x160) from [<80008584>] (gic_handle_irq+0x58/0x5c)

[<80008584>] (gic_handle_irq+0x58/0x5c) from [<8000dd00>] (__irq_svc+0x40/0x84)

Exception stack(0x80c15f70 to 0x80c15fb8)

5f60:                                     ffffffed 008e0000 80c1fe8c 00000000

5f80: 80c14000 80c1f2a4 8060e26c 80c667f5 00000001 80c667f5 00000000 00000000

5fa0: 00000000 80c15fb8 8000eda0 8000ed90 60000113 ffffffff

[<8000dd00>] (__irq_svc+0x40/0x84) from [<8000ed90>] (arch_cpu_idle+0x40/0x54)

[<8000ed90>] (arch_cpu_idle+0x40/0x54) from [<8005b344>] (cpu_startup_entry+0xfc/0x160)

[<8005b344>] (cpu_startup_entry+0xfc/0x160) from [<80bcfa9c>] (start_kernel+0x324/0x330)

[<80bcfa9c>] (start_kernel+0x324/0x330) from [<10008074>] (0x10008074)

****************************************************************************************************************************

Steps to patch the kernel

1. Followed the steps as mentioned in http://git.freescale.com/git/cgit.cgi/imx/meta-fsl-bsp-release.git/tree/imx/README?h=dora_3.10.9-1.0... to build

2. Patched the kernel at (build/tmp/work/imx6qsabresd-poky-linux-gnueabi/linux-imx/3.10.9-r0) with 3.10.9-rt5

3. Configured the kernel to enable Fully Preemptible Kernel

     a) bitbake -c menuconfig linux-imx

     b) bitbake -f -c compile linux-imx

     c) bitbake -c deploy linux-imx

4) While building I had an issue with gc_hal_kernel_os.c. Followed the post http://patches.openembedded.org/patch/65803/  to fix the issue without changing the NR_CPUS

How to fix the above issue?

Thanks,

Shitij

[Bio_TICFSL]

This may help:

Re: IMX6q GPU driver, galcore does not load