1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SPARC64_PIL_H 3 #define _SPARC64_PIL_H 4 5 /* To avoid some locking problems, we hard allocate certain PILs 6 * for SMP cross call messages that must do a etrap/rtrap. 7 * 8 * A local_irq_disable() does not block the cross call delivery, so 9 * when SMP locking is an issue we reschedule the event into a PIL 10 * interrupt which is blocked by local_irq_disable(). 11 * 12 * In fact any XCALL which has to etrap/rtrap has a problem because 13 * it is difficult to prevent rtrap from running BH's, and that would 14 * need to be done if the XCALL arrived while %pil==PIL_NORMAL_MAX. 15 * 16 * Finally, in order to handle profiling events even when a 17 * local_irq_disable() is in progress, we only disable up to level 14 18 * interrupts. Profile counter overflow interrupts arrive at level 19 * 15. 20 */ 21 #define PIL_SMP_CALL_FUNC 1 22 #define PIL_SMP_RECEIVE_SIGNAL 2 23 #define PIL_SMP_CAPTURE 3 24 #define PIL_DEVICE_IRQ 5 25 #define PIL_SMP_CALL_FUNC_SNGL 6 26 #define PIL_DEFERRED_PCR_WORK 7 27 #define PIL_KGDB_CAPTURE 8 28 #define PIL_NORMAL_MAX 14 29 #define PIL_NMI 15 30 31 #endif /* !(_SPARC64_PIL_H) */