------- Comment From far...@us.ibm.com 2022-03-03 16:21 EDT-------
A draft of the kvm-unit-test patches for these changes are now posted upstream:

https://lore.kernel.org/r/20220303210425.1693486-1-far...@linux.ibm.com/

There are a couple of additional cleanups in the series, but the key points are:
- (Patch 1) The SIGP SENSE used to determine if a CPU is operating/stopped now 
loops if it returns a CC2 (now possible with the kernel changes here)
- (Patch 4 and 5) The test of the SIGP STOP/RESTART opcodes don't do any 
additional looping other than that CC2 loop for a SIGP SENSE

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https://bugs.launchpad.net/bugs/1962578

Title:
  [UBUNTU 20.04] Fix SIGP processing on KVM/s390

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