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The vcpu stall detector allows the host to monitor the availability of a guest VM. Introduce a PPI interrupt which can be injected from the host into the virtual gic to let the guest reboot itself. Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Sebastian Ene <sebastianene@google.com> Link: https://lore.kernel.org/r/20240703153732.3214238-2-sebastianene@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>