misc/pvpanic: add shutdown event definition

Shutdown requests are normally hardware dependent.
By extending pvpanic to also handle shutdown requests, guests can
submit such requests with an easily implementable and cross-platform
mechanism.

The event was added to the specification in qemu commit
73279cecca03 ("docs/specs/pvpanic: document shutdown event").

Signed-off-by: Thomas Weißschuh <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

include/uapi/misc/pvpanic.h

···
 
 #define PVPANIC_PANICKED	_BITUL(0)
 #define PVPANIC_CRASH_LOADED	_BITUL(1)
+#define PVPANIC_SHUTDOWN	_BITUL(2)
 
 #endif /* __PVPANIC_H__ */