Public bug reported:
Description: KVM: s390: unhandled guest LPSWEY instruction
Symptom: guest kernel oops on LPSWEY instruction
Problem: in rare cases like machine check injection with
PSW disabled, all load PSW instructions are
intercepted. LPSW and LPSWE are handled by KVM but
not the new LPSWEY
Solution: Provide an LPSWEY handler in KVM.
Reproduction: hotplug a device while a CPU is disabled for machine
checks, e.g. during early boot
Upstream-ID: 4c6abb7f7b349f00c0f7ed5045bf67759c012892
Preventive: yes
Reported: upstream
Component: kernel
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-207398 severity-medium
targetmilestone-inin---
** Tags added: architecture-s39064 bugnameltc-207398 severity-medium
targetmilestone-inin---
** Changed in: ubuntu
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Package changed: ubuntu => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/2072641
Title:
[UBUNTU 22.04] KVM: s390: unhandled guest LPSWEY instruction
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