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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596// SPDX-License-Identifier: GPL-2.0// Copyright (C) 2017 Arm Ltd.#ifndef __LINUX_ARM_SDEI_H#define __LINUX_ARM_SDEI_H
#include <uapi/linux/arm_sdei.h>
#include <acpi/ghes.h>
#ifdef CONFIG_ARM_SDE_INTERFACE#include <asm/sdei.h>#endif
/* Arch code should override this to set the entry point from firmware... */#ifndef sdei_arch_get_entry_point#define sdei_arch_get_entry_point(conduit) (0)#endif
/* * When an event occurs sdei_event_handler() will call a user-provided callback * like this in NMI context on the CPU that received the event. */typedef int (sdei_event_callback)(u32 event, struct pt_regs *regs, void *arg);
/* * Register your callback to claim an event. The event must be described * by firmware. */int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg);
/* * Calls to sdei_event_unregister() may return EINPROGRESS. Keep calling * it until it succeeds. */int sdei_event_unregister(u32 event_num);
int sdei_event_enable(u32 event_num);int sdei_event_disable(u32 event_num);
/* * Signal the software-signalled event (event 0) to another PE, NMI-like. * @mpidr is the target's MPIDR affinity. */int sdei_event_signal(u32 event_num, u64 mpidr);
/* Was SDEI firmware probed and usable? */bool sdei_is_present(void);
/* GHES register/unregister helpers */int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb, sdei_event_callback *critical_cb);int sdei_unregister_ghes(struct ghes *ghes);
#ifdef CONFIG_ARM_SDE_INTERFACE/* For use by arch code when CPU hotplug notifiers are not appropriate. */int sdei_mask_local_cpu(void);int sdei_unmask_local_cpu(void);void __init acpi_sdei_init(void);void sdei_handler_abort(void);#elsestatic inline int sdei_mask_local_cpu(void) { return 0; }static inline int sdei_unmask_local_cpu(void) { return 0; }static inline void acpi_sdei_init(void) { }static inline void sdei_handler_abort(void) { }#endif /* CONFIG_ARM_SDE_INTERFACE */
/* * This struct represents an event that has been registered. The driver * maintains a list of all events, and which ones are registered. (Private * events have one entry in the list, but are registered on each CPU). * A pointer to this struct is passed to firmware, and back to the event * handler. The event handler can then use this to invoke the registered * callback, without having to walk the list. * * For CPU private events, this structure is per-cpu. */struct sdei_registered_event { /* For use by arch code: */ struct pt_regs interrupted_regs;
sdei_event_callback *callback; void *callback_arg; u32 event_num; u8 priority;};
/* The arch code entry point should then call this when an event arrives. */int notrace sdei_event_handler(struct pt_regs *regs, struct sdei_registered_event *arg);
/* arch code may use this to retrieve the extra registers. */int sdei_api_event_context(u32 query, u64 *result);
#endif /* __LINUX_ARM_SDEI_H */