JP5.0 kernel brings up error

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Hi,

we build JP5.0 kernel and run it on Jetson NX platfrom, the serial port brings up errors as follows:
[ 8.672691] tegra-carveouts tegra-carveouts: vpr :dma coherent mem declare 0x00000000ce000000,704643072
[ 8.672697] tegra-carveouts tegra-carveouts: assigned reserved memory node vpr-carveout
[ 8.672711] nvmap_page_pool_init: Total RAM pages: 3814763
[ 8.672716] nvmap_page_pool_init: nvmap page pool size: 476845 pages (1862 MB)
[ 8.673033] nvmap_background_zero_thread: PP zeroing thread starting.
[ 8.673101] misc nvmap: created heap vpr base 0x00000000ce000000 size (688128KiB)
[ 8.673242] misc nvmap: cvsram :dma coherent mem declare 0x0000000050000000,4194304
[ 8.673250] misc nvmap: created heap cvsram base 0x0000000050000000 size (4096KiB)
[ 8.748296] NET: Registered protocol family 29
[ 8.753101] systemd[1]: Finished Set console scheme.
[ 8.755043] nvgpu: 17000000.gv11b nvgpu_nvhost_syncpt_init:135 [INFO] syncpt_unit_base 60000000 syncpt_unit_size 400000 size 1000
[ 8.755043]
[ 8.759331] systemd[1]: Finished Remount Root and Kernel File Systems.
[ 8.766742] can: raw protocol
[ 8.777366] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[ 8.779472] systemd[1]: Condition check resulted in Rebuild Hardware Database being skipped.
[ 8.784915] Mem abort info:
[ 8.793982] systemd[1]: Condition check resulted in Platform Persistent Storage Archival being skipped.
[ 8.796817] ESR = 0x96000044
[ 8.809011] EC = 0x25: DABT (current EL), IL = 32 bits
[ 8.810918] systemd[1]: Starting Load/Save Random Seed…
[ 8.814459] SET = 0, FnV = 0
[ 8.814463] EA = 0, S1PTW = 0
[ 8.814465] Data abort info:
[ 8.814469] ISV = 0, ISS = 0x00000044
[ 8.814471] CM = 0, WnR = 1
[ 8.814476] user pgtable: 4k pages, 48-bit VAs, pgdp=000000010a70a000
[ 8.814479] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
[ 8.814490] Internal error: Oops: 96000044 [#1] PREEMPT SMP
[ 8.814494] Modules linked in: can_raw nvgpu can nvmap ip_tables x_tables
[ 8.814517] CPU: 2 PID: 7 Comm: kworker/u12:0 Not tainted 5.10.104-tegra #1
[ 8.814520] Hardware name: Unknown NVIDIA Jetson Xavier NX Developer Kit/NVIDIA Jetson Xavier NX Developer Kit, BIOS r35.0-121deda0 07/08/2022
[ 8.814535] Workqueue: events_unbound async_run_entry_fn
[ 8.814541] pstate: 40c00009 (nZcv daif +PAN +UAO -TCO BTYPE=–)
[ 8.814548] pc : __memset+0x16c/0x188
[ 8.814554] lr : __dma_alloc_from_coherent+0xac/0x140
[ 8.814556] sp : ffff800010083a70
[ 8.814563] x29: ffff800010083a70 x28: ffff28bc9b610000
[ 8.910009] x27: ffff28bc9b611e00 x26: ffffc1c5c1f8f578
[ 8.910016] x25: 0000000000000008 x24: ffffc1c5c1d6ee60
[ 8.910023] x23: 0000000000000000 x22: ffff28bc9b46d028
[ 8.910028] x21: ffff800010083b80 x20: 00000000000a3000
[ 8.910036] x19: 0000000000000000 x18: 0000000000000001
[ 8.910042] x17: 0000000000008938 x16: ffffc1c5fc18d410
[ 8.910048] x15: ffff28bc848013f0 x14: ffffffffffffffff
[ 8.948583] x13: ffff28bc9af89d88 x12: 0000000000000100
[ 8.948592] x11: 000000000002a000 x10: 0000000000000100
[ 8.948599] x9 : 0000000000000000 x8 : 0000000000000000
[ 8.964684] x7 : 0000000000000000 x6 : 000000000000003f
[ 8.964693] x5 : 0000000000000040 x4 : 0000000000000000
[ 8.964699] x3 : 0000000000000004 x2 : 00000000000a2fc0
[ 8.980786] x1 : 0000000000000000 x0 : 0000000000000000
[ 8.980795] Call trace:
[ 8.980805] __memset+0x16c/0x188
[ 8.980812] dma_alloc_from_dev_coherent+0x48/0x80
[ 8.980816] dma_alloc_attrs+0x64/0xf0
[ 8.981059] gk20a_tegra_init_secure_alloc+0x64/0x100 [nvgpu]
[ 8.981293] gv11b_tegra_late_probe+0x20/0x30 [nvgpu]
[ 9.011446] nvgpu_probe+0x6d0/0x930 [nvgpu]
[ 9.011620] gk20a_probe+0x628/0x810 [nvgpu]
[ 9.020075] platform_drv_probe+0x58/0xb0
[ 9.020105] really_probe+0xf4/0x3d0
[ 9.020115] driver_probe_device+0x5c/0xc0
[ 9.031537] __driver_attach_async_helper+0x64/0x70
[ 9.031545] async_run_entry_fn+0x48/0x150
[ 9.031551] process_one_work+0x1c0/0x4a0
[ 9.031555] worker_thread+0x50/0x420
[ 9.031565] kthread+0x148/0x170
[ 9.051570] ret_from_fork+0x10/0x18
[ 9.051602] Code: 91010108 54ffff4a 8b040108 cb050042 (d50b7428)
[ 9.061283] —[ end trace 17f5044bf53b2d2c ]—
[ 9.061289] Kernel panic - not syncing: Oops: Fatal exception
Could you please help to check what’s wrong? Thanks.

3

hello weileng,

here’s the failure.

may I know all the details you’ve built the kernel, and also the steps to update the kernel image.
thanks

4

Hello Jerry

we used the default tegra defconfig as follows
make ARCH=arm64 O=${TEGRA_KERNEL_OUT} tegra_defconfig
it will generate Image.

Using the image to replace boot/Image as follows.
./Linux_for_Tegra/rootfs/boot/Image

5

kernel.log (140.4 KB)
Attached kernel log.

6

Do you still have the default kernel? If so, start with its “/proc/config.gz” instead of “tegra_defconfig”. There are many differences in 5.x between what it ships with and tegra_defconfig.

7

hello weileng,

please refer to developer guide, Building the Kernel.
have you installed the Jetson Linux build utilities? i.e. $ sudo apt install build-essential bc
please use the script file to build the kernel, there’s nvbuild.sh which help you to build kernel sources in the directory.
thanks

8

Thanks for your replay. I have tried to replace /proc/config.gz to tegra_defconfig, such issus still happened. If I used the original Image from JP5.0, the kernel can bring up.

9

Hi Jerry,

Prevouis we build JP4.6.1 used this method has no such kerne brings up. This issue happened on R32.5 early access v2.

10

hello weileng,

please refer to JetPack SDK | NVIDIA Developer.
could you please double confirm the release version, is it l4t-r34.1.1/JetPack-5.0.1 DP?

you may try below configuration and build the kernel again,

$ export TEGRA_KERNEL_OUT=$TOP/Orin+Xavier_R34.1.1_Build/Orin-out-0704
$ export CROSS_COMPILE_AARCH64=$TOP/CROSS_COMPILE/Toolchain_gcc_9.3/bin/aarch64-buildroot-linux-gnu-
$ cd Linux_for_Tegra/source/public
$ ./nvbuild.sh -o $TEGRA_KERNEL_OUT

here show the download links.
R34.1.1 public_sources, https://developer.nvidia.com/embedded/l4t/r34_release_v1.1/sources/public_sources.tbz2
GCC-9.3 toolchain, https://developer.nvidia.com/embedded/jetson-linux/bootlin-toolchain-gcc-93

12

From release notes, the workaround is workable as follows:

Refer to the Jetson-Linux 34.1.1 Developer Guide for more information about toolchain and
steps to compile the kernel sources. BSP kernel sources have a known issue where the
insmod of the nvgpu.ko that was compiled from the released EA sources leads to a system
crash.
Workaround
Make the following changes that are displayed in bold:
— a/kernel/nvgpu/drivers/gpu/nvgpu/Makefile.linux.configs
+++ b/kernel/nvgpu/drivers/gpu/nvgpu/Makefile.linux.configs
@@ -1,6 +1,10 @@

Turn off all other configs, if CONFIG_GK20A is not set

CONFIG_GK20A := m
+NV_BUILD_KERNEL_OPTIONS := 5.10
+

Enable the nv_sched build.

CONFIG_NVS_PRESENT := y
/build command/

13

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