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SubjectRe: [PATCH] x86: default to reboot via ACPI

* Avi Kivity <> wrote:

> Triple-fault and keyboard reset may assert INIT instead of RESET;
> however INIT is blocked when Intel VT is enabled. This leads to a
> partially reset machine when invoking emergency_restart via sysrq-b:
> the processor is still working but other parts of the system are dead.
> Default to rebooting via ACPI, which correctly asserts RESET and
> reboots the machine.
> This is safe since we will fall back to keyboard reset and triple
> fault if acpi is not enabled or if the reset is not successful.
> Signed-off-by: Avi Kivity <>

applied to tip/x86/reboot - thanks Avi!


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