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Description: kernel: s390/cpum_cf: make crypto counters upward
compatible
Symptom: The CPU Measurement facility crypto counter set is not
listed in the device sysfs tree.
Problem: The CPU Measurement facility crypto counter set is not
exported in the sysfs directory
/sys/devices/cpum_cf/events.
The attribute files for each CPU-MF counter defined
in the crypto counter set is missing. This is caused
by the counter second version number of the CPU
Measurement Facility hardware being incremented on
new machines. This causes a sanity check to fail,
but the counters are supported by hardware.
Solution: Remove upper limit in counter second version number
check.
Reproduction: Run command on a new machine generation:
# ls -l /sys/devices/cpum_cf/events/ | grep AES
#
If the output is empty than this patch is required.
The output should be:
# ls /sys/devices/cpum_cf/events/ | grep AES
AES_BLOCKED_CYCLES
AES_BLOCKED_FUNCTIONS
AES_CYCLES
AES_FUNCTIONS
#
Upstream-ID of fix: f10933cbd2dfddf6273698a45f76db9bafd8150f
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-207993 severity-high
targetmilestone-inin---
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[UBUNTU 22.04] kernel: s390/cpum_cf: make crypto counters upward compatible
https://bugs.launchpad.net/bugs/2074380
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