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Will Deacon authored
Our exit/reboot code is a bit of a mess: - Both kvm__reboot and kvm_cpu_exit send SIGKVMEXIT to running vcpus - When vcpu0 exits, the main thread starts executing destructors (exitcalls) whilst other vcpus may be running - The pause_lock isn't always held when inspecting is_running for a vcpu This patch attempts to fix these issues by restricting the exit/reboot path to vcpu0 and the main thread. In particular, a KVM_SYSTEM_EVENT will signal SIGKVMEXIT to vcpu0, which will join with the main thread and then tear down the other vcpus before invoking any destructor code. Acked-by: Balbir Singh <bsingharora@gmail.com> Tested-by: Julien Grall <julien.grall@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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