[UBUNTU 22.04] KVM: s390: unhandled guest LPSWEY instruction
Bug #2072641 reported by
bugproxy
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu on IBM z Systems |
Triaged
|
Medium
|
Skipper Bug Screeners | ||
linux (Ubuntu) |
Triaged
|
Medium
|
Unassigned |
Bug Description
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
not the new LPSWEY
Solution: Provide an LPSWEY handler in KVM.
Reproduction: hotplug a device while a CPU is disabled for machine
Upstream-ID: 4c6abb7f7b349f0
Preventive: yes
Reported: upstream
Component: kernel
tags: | added: architecture-s39064 bugnameltc-207398 severity-medium targetmilestone-inin--- |
Changed in ubuntu: | |
assignee: | nobody → Skipper Bug Screeners (skipper-screen-team) |
affects: | ubuntu → linux (Ubuntu) |
Changed in ubuntu-z-systems: | |
status: | New → Triaged |
Changed in linux (Ubuntu): | |
status: | New → Triaged |
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Would it be possible to get a test case aka reproducer on this (so forcing the system into such a rare case)? Since we would need a kind of a test for a potential SRU.