Disabling/Enabling Access to the Hardware

The secure host feature enables ConnectX family devices to block access to its internal hardware registers. The hardware access in this mode is allowed only if a correct 64 bits key is provided.

5th Generation Devices

Secure Host can be enabled on 5th generation devices in one of the following manners:

1. Set the key:

   # flint -d /dev/mst/mt4115_pciconf0 set_key 18022018
   -I- Secure Host was enabled successfully on the device.
   

2. Disable HW access:

   # flint -d /dev/mst/mt4115_pciconf0 hw_access disable 18022018
   -I- Secure Host was enabled successfully on the device.
   

   If the key was not provided in the command line, an interactive shell will ask for it, and verifying it:

   # flint -d /dev/mst/mt4115_pciconf0 set_key
   Enter Key : ********
   Verify Key : ********
   -I- Secure Host was enabled successfully on the device.
   

Or

1. Disable the Secure Host (Enable HW access): 

   # flint -d /dev/mst/mt4115_pciconf0 hw_access enable 18022018
   -I- The Secure Host was disabled successfully on the device.
   And the same as previous, providing the key can be done in interactive shell:
   # flint -d /dev/mst/mt4115_pciconf0 hw_access enable
   Enter Key : ********
   -I- The Secure Host was disabled successfully on the device.
   

Last updated: June 03, 2026