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------- Comment From TMRICHT@xxxxxxxxxx 2025-07-22 02:45 EDT-------
I have played around and got it installed:
root@b83lp65:~/xxx# lscpumf -C
....
10:173	ICW_ON_CHIP
10:174	ICW_ON_CHIP_IV
10:175	ICW_ON_CHIP_CHIP_HIT
10:176	ICW_ON_CHIP_DRAWER_HIT
10:177	ICW_ON_MODULE
10:178	ICW_ON_DRAWER
10:179	ICW_OFF_DRAWER
10:202	CYCLES_SAMETHRD
10:203	CYCLES_DIFFTHRD
10:204	INST_SAMETHRD
10:205	INST_DIFFTHRD
10:206	WRONG_BRANCH_PREDICTION
10:225	VX_BCD_EXECUTION_SLOTS
10:226	DECIMAL_INSTRUCTIONS
10:232	LAST_HOST_TRANSLATIONS
10:244	TX_NC_TABORT
10:245	TX_C_TABORT_NO_SPECIAL
10:246	TX_C_TABORT_SPECIAL
10:248	DFLT_ACCESS
10:253	DFLT_CYCLES
10:256	SORTL
10:265	DFLT_CC
10:266	DFLT_CCFINISH
10:267	NNPA_INVOCATIONS
10:268	NNPA_COMPLETIONS
10:269	NNPA_WAIT_LOCK
10:270	NNPA_HOLD_LOCK
10:272	NNPA_INST_ONCHIP
10:273	NNPA_INST_OFFCHIP
10:274	NNPA_INST_DIFF
10:276	NNPA_4K_PREFETCH
10:277	NNPA_COMPL_LOCK
10:278	NNPA_RETRY_LOCK
10:279	NNPA_RETRY_LOCK_WITH_PLO
10:448	MT_DIAG_CYCLES_ONE_THR_ACTIVE
10:449	MT_DIAG_CYCLES_TWO_THR_ACTIVE
root@b83lp65:~/xxx# lscpumf -C | grep 10: | wc -l
105
root@b83lp65:~/xxx#

I confirm this version works and is ok.

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https://bugs.launchpad.net/bugs/2103414

Title:
  [25.04 FEAT] [post announcement] [KRN2304] CPU-MF Counters for new IBM
  Z hardware - s390-tools part

Status in Ubuntu on IBM z Systems:
  In Progress
Status in s390-tools package in Ubuntu:
  Fix Released
Status in s390-tools-signed package in Ubuntu:
  Fix Released
Status in s390-tools source package in Noble:
  Fix Committed
Status in s390-tools-signed source package in Noble:
  Fix Committed
Status in s390-tools source package in Plucky:
  Fix Committed
Status in s390-tools-signed source package in Plucky:
  Fix Committed
Status in s390-tools source package in Questing:
  Fix Released
Status in s390-tools-signed source package in Questing:
  Fix Released

Bug description:
  [ Impact ]

   * A new IBM Z hardware generation (z17) was recently introduced.

   * Hence s390-tools' libutil needs to be aware of the new hardware
     name (z17, z17_2) and it's new type(s) (9175, 9176) to be able
     to identify and map type to name and vice versa.

   * This is especially needed to map new CPU management facility (MF)
     hardware counters to the correct hardware name and type.

   * Without patching, new z17 hw, i.e. if referenced in CPU MF
     (or other cases) by it's new machine type, would be reported
     by libutils as "Unknown machine type".

  [ Test Plan ]

   * Prepare an IBM z17 LPAR with Ubuntu 25.04
     (incl. this s390-tools patch and the commit above for the kernel).

   * At LPARs activation profile, navigate to the Security page
     and within the counter facility options, select each counter set
     you want to use. (One may just select all for testing purposes.)

   * Use 'perf list' to determine if the new counters are listed.
     (Cmd 'ls -l /sys/devices/cpum_cf/events | wc -l' needs to report 106 on z17.)

   * For comparing the new counters (and their names) see:
     dc7cafd91cba ("s390/cpumf: Update CPU Measurement facility extended
     counter set support")
     https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/\
     plucky/commit/?h=master-next&id=dc7cafd91cba63b200f33ced7530b1d76a2b5495

   * Use 'perf stat -e <counter>' to enable and make use of these
  counters.

   * In addition to the more end to end test above,
     a proper machine identification can be done using
     the lscpumf tool (that uses lbutils):

     - libutils is a static library (.a) used by lscpumf.
       If 'lscpumf -C' is used to list all counters that are provided
       by the underlying IBM Z hardware generation, it will list the
       identified hardware in the first row
       (mapped from its type number, obtained from /proc/sysinfo
       'Type:' field):

    - $ lscpumf -C | head -1
        perf event counter list for IBM z17

    - The complete output of 'lscpumf -C' should then contain all
      the new counters that are now available for the new hardware
      generation (see above kernel commit dc7cafd91cba).

  [ Fix ]

   * b3db52fd165e6a26d9c73e51bd5322b55017ef94
     ("libutil: Add machine type definition for machines 9175 and 9176")

   * Nobel misses the type for an intermediate/updated model
     ('Z16_A02' on top of Z16)
     thus I'm adding this first (needed for noble only) as a pre-requirement.
     ef1799f31fa2a11467373077058b8b5a3838c4b1
     ("s390-tools/libutil: Add machine type 3932")

  [ Where problems could occur ]

   * The patch is pretty straight forward, but there can always be problems,
     be it a 'slip of the pen' or a typo, with that:

   * The names or type information could be wrong, which could lead
     to an incorrect identification (or not identification) of a z17 system.

   * The new case statements might not be inserted correctly
     or not correctly closed/terminated,
     which might lead again to an incorrect identification
     or to "Unknown machine type".

   * The above could again lead to:
     - incorrect event exposure on unsupported hardware
     - invalid perf measurements
     - sysfs inconsistencies
     - or warnings due to misconfigured or non-existent counters

   * Only new code is added by this commit - none is changed nor
  removed.

   * These CPU MF counters and their handling is unique to s390x,
     hence no other architectures are be affected.

  [ Other Info ]

   * The CPU MF hw counters themselves are part of the kernel:
     dc7cafd91cba ("s390/cpumf: Update CPU Measurement facility extended
     counter set support") and are handled in kernel SRU LP#2114258.

   * Hence there is no harm to have the support in s390-tools before having
     in the kernel, since in this case the new type info will just not be used.
     In case the kernel has support first and libutils is used,
     libutil will report "Unknown machine type".
  __________

  Feature Description:

  Support for CPU-MF counters of new IBM Z hardware in kernel,
  s390-tools, perf (kernel) and libpfm4.

  This part covers the s390-tools changes to lscpumf and libutil.

  The related patches / commit IDs will be provided as soon as the
  required information has been publicly disclosed.

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