Crash during a register access for PCIe compliance test

Hi,

We do PCIe compliance test by following Document “Jetson AGX Xavier Series Tuning and Compliance Guide DA-09855-001_v1.3” - Section “Jetson AGX Xavier PCIe Compliance Testing Reference” - Page 27.

When we tried to access the register “0x14160004” or “0x141A0004”

using devmem2 and busybox devmem tools

we get the following output from a remote terminal:

agx@ubuntu:~$ sudo devmem2 0x14160004

/dev/mem opened.

Memory mapped at address 0x7f9d299000.

Bus error

agx@ubuntu:~$ sudo busybox devmem 0x14160004

0xDEAD2003

MG: THE SYSTEM CRASHES AND RESTARTS HERE !!!

From a local terminal, the last register value print to the command-line is not visible.

There is a sudden freeze and than the crash/restart.

Our system with a custom baseboard with SDK 4.6.

But I got the same result from our AGX Xavier development kit with SDK 4.6.3 with the following logs (attached):
lspci.log (1.6 KB)
dmesg.log (73.7 KB)

How can we access those registers?

Best,

Mustafa Gueler