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

[Taihsiang Ho]

Reproducible with the following conditions:

ubuntu at saenger:~$ uname -a
Linux saenger 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:10:16 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux
ubuntu at saenger:~$ dpkg -l libc-bin
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                                                  Version                         Architecture                    Description
+++-=====================================================-===============================-===============================-===============================================================================================================
ii  libc-bin                                              2.27-3ubuntu1                   arm64                           GNU C Library: Binaries
ubuntu at saenger:~$

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

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

Status in kunpeng920:
  New
Status in kunpeng920 ubuntu-18.04 series:
  New
Status in kunpeng920 ubuntu-18.04-hwe series:
  New
Status in kunpeng920 ubuntu-18.10 series:
  New
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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