Serialized DPU and Host Boot Sequence
Supported starting from NVIDIA BlueField-3 devices.
Following a server power cycle, both the DPU and Host OSes begin boot at the same moment. On some servers, Host OS may complete boot before DPU services are fully operational.
By using serialized DPU and Host boot as described below, the boot flow can be serialized between DPU and Host. On every server power cycle, DPU initiates its boot sequence while holding Host OS from booting during its BIOS execution phase, until DPU Arm-OS is up. Once DPU Arm-OS is up, Host OS is released to start loading.
This feature is disabled by default.
To Enable:
From host or Arm-OS console, run:
#> sudo mlxconfig -d /dev/mst/<device> s DELAY_HOST_OS_INIT=1
For this configuration to take effect, BlueField reset should be applied.
To Disable:
From host or Arm-OS console, run:
#> sudo mlxconfig -d /dev/mst/<device> s DELAY_HOST_OS_INIT=2
For this configuration to take effect, BlueField reset should be applied.