| 12345678910111213141516171819202122232425262728293031 |
- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _SPARC64_PIL_H
- #define _SPARC64_PIL_H
- /* To avoid some locking problems, we hard allocate certain PILs
- * for SMP cross call messages that must do a etrap/rtrap.
- *
- * A local_irq_disable() does not block the cross call delivery, so
- * when SMP locking is an issue we reschedule the event into a PIL
- * interrupt which is blocked by local_irq_disable().
- *
- * In fact any XCALL which has to etrap/rtrap has a problem because
- * it is difficult to prevent rtrap from running BH's, and that would
- * need to be done if the XCALL arrived while %pil==PIL_NORMAL_MAX.
- *
- * Finally, in order to handle profiling events even when a
- * local_irq_disable() is in progress, we only disable up to level 14
- * interrupts. Profile counter overflow interrupts arrive at level
- * 15.
- */
- #define PIL_SMP_CALL_FUNC 1
- #define PIL_SMP_RECEIVE_SIGNAL 2
- #define PIL_SMP_CAPTURE 3
- #define PIL_DEVICE_IRQ 5
- #define PIL_SMP_CALL_FUNC_SNGL 6
- #define PIL_DEFERRED_PCR_WORK 7
- #define PIL_KGDB_CAPTURE 8
- #define PIL_NORMAL_MAX 14
- #define PIL_NMI 15
- #endif /* !(_SPARC64_PIL_H) */
|
