lscpu shows wrong L3 Cache size on NVIDIA Orin Nano

[Penny Chiu]

For NVIDIA Orin Nano, L3 all cache size is 4M. But we got different result via lscpu comes from different version of util-linux:

lscpu from util-linux 2.34 which is the default version in Ubuntu focal (20.04) and shows wrong information:

    # lscpu -C // lscpu bin from util-linux 2.34
    NAME ONE-SIZE ALL-SIZE WAYS TYPE LEVEL
    L1d 64K 384K 4 Data 1
    L1i 64K 384K 4 Instruction 1
    L2 256K 1.5M 8 Unified 2
    L3 2M 2M 16 Unified 3

    # lscpu
    L1d cache: 384 KiB
    L1i cache: 384 KiB
    L2 cache: 1.5 MiB
    L3 cache: 2 MiB

lscpu from util-linux 2.39 shows correct information, and this version is only packaged for Ubuntu mantic (23.10):

    # lscpu -C // lscpu bin from util-linux 2.39
    NAME ONE-SIZE ALL-SIZE WAYS TYPE LEVEL SETS PHY-LINE COHERENCY-SIZE
    L1d 64K 384K 4 Data 1 256 64
    L1i 64K 384K 4 Instruction 1 256 64
    L2 256K 1.5M 8 Unified 2 512 64
    L3 2M 4M 16 Unified 3 2048 64

    # lscpu
    Caches (sum of all):
      L1d: 384 KiB (6 instances)
      L1i: 384 KiB (6 instances)
      L2: 1.5 MiB (6 instances)
      L3: 4 MiB (2 instances)

Looks like there was a fix during version 2.34 to 2.39, but we need to use Ubuntu 20.04. Can you please backport the fix change to 2.34 then we can get correct information using default lscpu for Ubuntu 20.04?

[Penny Chiu (pchiu)]

We tried lscpu 2.37.2, and it could also show correct information. So the fix change should be merged during 2.34 to 2.37.

Please help on this issue to backport the fix change to 2.34 for Ubuntu focal.