UEFI-Guest vm running on KVM is getting reboot upon hot-add vCPU.

Solution Verified - Updated -

Issue

  • The VM running on KVM is getting crash/reboot after hot-plug vCPU.
    • If the kdump is disabled, the reboot/panic does not happen.
    • If the kdump is enabled, the reboot/panic does occur.
[root@localhost ~]# [  187.085693] CPU3 has been hot-added
[  187.112636] smpboot: Booting Node 0 Processor 3 APIC 0x3
[  187.117065] kvm-clock: cpu 3, msr 354010c1, secondary cpu clock
[  187.118081] smpboot: CPU 3 Converting physical 0 to logical die 3
[  187.141450] kvm-guest: stealtime: cpu 3, msr 5b6ec080
[  187.143160] Will online and init hotplugged CPU: 3

Environment

  • Red Hat Enterprise Linux 8
  • QEMU, UEFI(OVMF)

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