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cloud-hypervisor/hypervisor
Philipp Schuster a67277b9cd hypervisor: kvm: improve logging for triple fault
When a triple fault happens [0], we now get at least a log message. This
helps to better understand the root cause of sudden reboots.

Broader context: We experience reboots caused by triple faults in
edk2 (6 months old as well as recent). They happen so early in the boot
that one doesn't really see them without looking at the VMM log. An
automatic system reset plus reboot often hides these situations - now
they are at least more visible in the log.

PS: Printing the registers to get more debugging help doesn't help, as
the guest already triple-faulted - the CPU state of the root cause
doesn't exist anymore.

[0] https://elixir.bootlin.com/linux/v6.18.6/source/arch/x86/kvm/x86.c#L11123

On-behalf-of: SAP philipp.schuster@sap.com
Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
2026-05-07 16:43:04 +00:00
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