[Bug 1868028] Re: L2\L3 cache display error for using "getconf -a" command"

[Taihsiang Ho]

focal on scobee could reproduce this issue:

ubuntu at scobee:~$ apt-cache policy libc-bin
libc-bin:
  Installed: 2.31-0ubuntu7
  Candidate: 2.31-0ubuntu7
  Version table:
 *** 2.31-0ubuntu7 500
        500 http://ports.ubuntu.com/ubuntu-ports focal/main arm64 Packages
        100 /var/lib/dpkg/status
ubuntu at scobee:~$ uname -a; lsb_release -a; getconf LEVEL1_ICACHE_SIZE
Linux scobee 5.4.0-21-generic #25-Ubuntu SMP Sat Mar 28 13:12:38 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu Focal Fossa (development branch)
Release:        20.04
Codename:       focal
0

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https://bugs.launchpad.net/bugs/1868028

Title:
  L2\L3 cache display  error for using "getconf -a" command"

Status in kunpeng920:
  In Progress
Status in kunpeng920 ubuntu-18.04 series:
  In Progress
Status in kunpeng920 ubuntu-18.04-hwe series:
  New
Status in kunpeng920 ubuntu-18.10 series:
  Invalid
Status in kunpeng920 ubuntu-20.04 series:
  New
Status in kunpeng920 upstream-kernel series:
  New
Status in glibc package in Ubuntu:
  New

Bug description:
  [Bug Description]
  L2\L3 cache display  error for using "getconf -a" command"

  [Steps to Reproduce]
  1)uname -a 
  2)getconf -a

  
  [Actual Results]
  getconf -a
  GNU_LIBPTHREAD_VERSION             NPTL 2.27
  POSIX2_SYMLINKS                    1
  LEVEL1_ICACHE_SIZE                 0
  LEVEL1_ICACHE_ASSOC                0
  LEVEL1_ICACHE_LINESIZE             64
  LEVEL1_DCACHE_SIZE                 0
  LEVEL1_DCACHE_ASSOC                0
  LEVEL1_DCACHE_LINESIZE             64
  LEVEL2_CACHE_SIZE                  0
  LEVEL2_CACHE_ASSOC                 0
  LEVEL2_CACHE_LINESIZE              0
  LEVEL3_CACHE_SIZE                  0
  LEVEL3_CACHE_ASSOC                 0
  LEVEL3_CACHE_LINESIZE              0
  LEVEL4_CACHE_SIZE                  0
  LEVEL4_CACHE_ASSOC                 0
  LEVEL4_CACHE_LINESIZE              0

  
  [Expected Results]
  lscpu
  CPU max MHz:         2600.0000
  CPU min MHz:         200.0000
  BogoMIPS:            200.00
  L1d cache:           64K
  L1i cache:           64K
  L2 cache:            512K
  L3 cache:            65536K
  NUMA node0 CPU(s):   0-31

  
  [Reproducibility]

  [Additional information]
  (Firmware version, kernel version, affected hardware, etc. if required):

  [Resolution]

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