sdei.h (1727B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2// Copyright (C) 2017 Arm Ltd. 3#ifndef __ASM_SDEI_H 4#define __ASM_SDEI_H 5 6/* Values for sdei_exit_mode */ 7#define SDEI_EXIT_HVC 0 8#define SDEI_EXIT_SMC 1 9 10#define SDEI_STACK_SIZE IRQ_STACK_SIZE 11 12#ifndef __ASSEMBLY__ 13 14#include <linux/linkage.h> 15#include <linux/preempt.h> 16#include <linux/types.h> 17 18#include <asm/virt.h> 19 20extern unsigned long sdei_exit_mode; 21 22/* Software Delegated Exception entry point from firmware*/ 23asmlinkage void __sdei_asm_handler(unsigned long event_num, unsigned long arg, 24 unsigned long pc, unsigned long pstate); 25 26/* and its CONFIG_UNMAP_KERNEL_AT_EL0 trampoline */ 27asmlinkage void __sdei_asm_entry_trampoline(unsigned long event_num, 28 unsigned long arg, 29 unsigned long pc, 30 unsigned long pstate); 31 32/* 33 * The above entry point does the minimum to call C code. This function does 34 * anything else, before calling the driver. 35 */ 36struct sdei_registered_event; 37asmlinkage unsigned long __sdei_handler(struct pt_regs *regs, 38 struct sdei_registered_event *arg); 39 40unsigned long do_sdei_event(struct pt_regs *regs, 41 struct sdei_registered_event *arg); 42 43unsigned long sdei_arch_get_entry_point(int conduit); 44#define sdei_arch_get_entry_point(x) sdei_arch_get_entry_point(x) 45 46struct stack_info; 47 48bool _on_sdei_stack(unsigned long sp, unsigned long size, 49 struct stack_info *info); 50static inline bool on_sdei_stack(unsigned long sp, unsigned long size, 51 struct stack_info *info) 52{ 53 if (!IS_ENABLED(CONFIG_VMAP_STACK)) 54 return false; 55 if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE)) 56 return false; 57 if (in_nmi()) 58 return _on_sdei_stack(sp, size, info); 59 60 return false; 61} 62 63#endif /* __ASSEMBLY__ */ 64#endif /* __ASM_SDEI_H */