| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | struct stack_info; |
| 44 | |
| 45 | bool _on_sdei_stack(unsigned long sp, struct stack_info *info); |
| 46 | static inline bool on_sdei_stack(unsigned long sp, |
| 47 | struct stack_info *info) |
| 48 | { |
| 49 | if (!IS_ENABLED(CONFIG_VMAP_STACK)) |
| 50 | return false; |
| 51 | if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE)) |
| 52 | return false; |
| 53 | if (in_nmi()) |
| 54 | return _on_sdei_stack(sp, info); |
| 55 | |
| 56 | return false; |
| 57 | } |
| 58 | |
| 59 | #endif /* __ASSEMBLY__ */ |
| 60 | #endif /* __ASM_SDEI_H */ |