** Changed in: ubuntu-z-systems
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1959735
Title:
[22.04 FEAT] KVM: Improve SIGP architectural compliance
Status in Ubuntu on IBM z Systems:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Bug description:
Linux as a guest operating system often doesn't have as stringent
requirements to architectural compliance as traditional operating
systems that rely on it. Specifically, KVM implements the SIGP RESTART
in a non-compliant way, as it reports a CPU state to be stopped after
SIGP RESTART was issued, while it should report a busy condition until
the CPU is really started. This feature covers the necessary
fixes/improvements to KVM SIGP processing.
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