This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
zesty' to 'verification-done-zesty'. If the problem still exists, change
the tag 'verification-needed-zesty' to 'verification-failed-zesty'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-zesty

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https://bugs.launchpad.net/bugs/1689856

Title:
  perf: qcom: Add L3 cache PMU driver

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  [Impact]
  Without this driver, users of Qualcomm QDF2400 servers will be unable to 
profile L3 cache events.

  [Test case]
  ubuntu@ubuntu:~$ sudo perf list | grep l3cache | wc -l
  84

  Without this driver, there are 0.

  [Regression Risk]
  This is a new driver that is only used on these servers, so the regression 
risk is pretty isolated to this platform. To mitigate the risk there, I ran 
perf_fuzzer on that system and verified that it survived. Note: I did this 
testing w/ a workaround for LP: #1689855 applied, to avoid hangs caused by a 
hardware issue.

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