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 20 extern unsigned long sdei_exit_mode; 21 22 /* Software Delegated Exception entry point from firmware*/ 23 asmlinkage 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 */ 27 asmlinkage 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 */ 36 struct sdei_registered_event; 37 asmlinkage unsigned long __sdei_handler(struct pt_regs *regs, 38 struct sdei_registered_event *arg); 39 40 unsigned long sdei_arch_get_entry_point(int conduit); 41 #define sdei_arch_get_entry_point(x) sdei_arch_get_entry_point(x) 42 43 bool _on_sdei_stack(unsigned long sp); 44 static inline bool on_sdei_stack(unsigned long sp) 45 { 46 if (!IS_ENABLED(CONFIG_VMAP_STACK)) 47 return false; 48 if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE)) 49 return false; 50 if (in_nmi()) 51 return _on_sdei_stack(sp); 52 53 return false; 54 } 55 56 #endif /* __ASSEMBLY__ */ 57 #endif /* __ASM_SDEI_H */ 58