[UBUNTU 20.04] Deflate counters reported by lscpumf are not valid or available with perf

SRU Justification:
==================

[Impact]

* With perf from Ubuntu 20.04 on IBM z15 hardware, some counters reported with lscpumf are not usable with 'perf stat -e'.

* 'lscpumf -c' provides a list of available counters, but the following are not usable: DFLT_ACCESS, DFLT_CYCLES, DFLT_CC, DFLT_CCERROR

* 'perf list' is also not offering these counters.

* On the kernel side this is fixed with the following upstream accepted commit:

[Fix]

* d68d5d51dc898895b4e15bea52e5668ca9e76180 d68d5d51dc898895b "s390/cpum_cf: Add new extended counters for IBM z15"

[Test Case]

* Requires the fix/patch of the perf tool, as mentioned in the bug, too.

* An IBM z15 (or LinuxONE III) system with Ubuntu 20.04 installed in LPAR is needed where the counters are enabled in the activation profile.

* Use 'perf list' to determine if the counters DFLT_ACCESS, DFLT_CYCLES, DFLT_CC, DFLT_CCERROR are listed

* Use 'perf stat -e' to enable amd make use of these counters.

[Regression Potential]

* The regression can be considered as low, since:

* it's architecture specific (s390x)

* limited to IBM z15 hardware

* and only additional (s390x) hardware counters are defined and added.

[Other]

* This requires a patch to be included into the perf itself, too - please see bug description for more details.

* Since this patch is upstream in kernel 5.7 it will automatically land in groovy.

__________

---Problem Description---
ubuntu 20.04: perf on z15: some counters reported with lscpumf are not usable with perf stat -e

---uname output---
Linux ubu204 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:57:22 UTC 2020 s390x s390x s390x GNU/Linux

Machine Type = z15 8561

---Steps to Reproduce---
 lscpumf -c gives a list of available counters, but a few of them are not usable: DFLT_ACCESS,DFLT_CYCLES,DFLT_CC,DFLT_CCERROR
perf list is also not offering these counters.

A solution will be a backport to 20.04, and tried to made available for next SRU , code needed before 06-12.

Addl Info from Dev:
I have downloaded the following repository
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal
and checked out branch master-next.

Both patches appended apply without warning and the compilation showed no error.

For the perf tool:
e7950166e40271c02 perf vendor events s390: Add new deflate counters for IBM z15

For the s390 kernel
d68d5d51dc898895b s390/cpum_cf: Add new extended counters for IBM z15

All accepted for kernel 5.7 rc1

Please include both patches into Ubuntu 20.04