Has Jetson TX2 GPU L2 ECC protection?

[sergio5]

Hi all,
from the comments in previous post I think that Jetson TX2 doesn´t have ECC implemented (on the contrary .TX2i have it).
However I found the following message in the syslog reporting a single-bit error detected in GPU L2, so I wonder if GPU L2 is ECC protected in TX2.
Thank you in advance

[ 16.922505] nvgpu: 17000000.gp10b gp10b_ltc_isr:298 [ERR] mc_ltc_intr: 00000002
[ 16.931753] nvgpu: 17000000.gp10b gp10b_ltc_lts_isr:252 [ERR] Single bit error detected in GPU L2!
[ 16.942380] nvgpu: 17000000.gp10b gp10b_ltc_lts_isr:286 [ERR] ltc1, slice 0: bb4f0110
[ 32.956692] nvgpu: 17000000.gp10b gk20a_fifo_handle_mmu_fault_locked:1722 [ERR] mmu fault on engine 0, engine subid 0 (gpc), client 10 (t1 3), addr 0xf00b1a000, type 0 (pde), access_type 0x00000001,inst_ptr 0x1fff1fb000

[kayccc]

By the confirmation with intenral team, the TX2 GPU L2 ECC has been enabled.

[sergio5]

OK, then is it possible to disable the L2 GPU ECC? how?
Thank you in advance

[kayccc]

Why do you want to disable it? For what purpose?

[sergio5]

Hi,
radiation testing, we want to evaluate software techniques for soft error mitigation.

[kayccc]

SW checking for error can be disabled by disabling the config - CONFIG_TEGRA_SAFETY.

[sergio5]

Thanks,
please, could you provide a link to any documentation related to CONFIG_TEGRA_SAFETY?
TIA

[Bibek]

linux source is shipped with jetpack, you can check the Kconfig
/kernel/nvidia/drivers/platform/tegra/Kconfig
But complete safety is only available as part of JSEP software which is paid

Jetson Safety Extension