Unprotected memory region in CC mode.

[Teofil98]

Hi everyone,

I am trying to partition the vidmem into CPR and non-protected. The driver seems to currently ignore unprotected memory since everything seems to be set as CPR in CC mode as reported by

# nvidia-smi conf-compute -gm
GPU 0: NVIDIA H100 NVL (UUID: GPU-dd31e21b-6df1-d506-b9d2-4d6d241d42be)
Protected memory size:   97125248 KiB
Unprotected memory size: 0 KiB

However, nvidia-sm conf-compute -h seems to suggest that the unprotected memory size can be set

 [-sm | --set-unprotected-mem-size]: Set Confidential Compute GPU Unprotected Memory Size in KiB

Unfortunately, I haven't been able to get this to work and actually change the numbers reported by -gm. I was wondering if anyone has experience instructing the firmware to allocate unprotected memory. I would be interested in implementing support for it in the driver if it is possible to carve out that unprotected memory from the firmware. Thank you!