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7#ifndef __ASM_TRAP_H
8#define __ASM_TRAP_H
9
10#include <linux/list.h>
11#include <asm/esr.h>
12#include <asm/sections.h>
13
14struct pt_regs;
15
16struct undef_hook {
17 struct list_head node;
18 u32 instr_mask;
19 u32 instr_val;
20 u64 pstate_mask;
21 u64 pstate_val;
22 int (*fn)(struct pt_regs *regs, u32 instr);
23};
24
25void register_undef_hook(struct undef_hook *hook);
26void unregister_undef_hook(struct undef_hook *hook);
27void force_signal_inject(int signal, int code, unsigned long address, unsigned int err);
28void arm64_notify_segfault(unsigned long addr);
29void arm64_force_sig_fault(int signo, int code, void __user *addr, const char *str);
30void arm64_force_sig_mceerr(int code, void __user *addr, short lsb, const char *str);
31void arm64_force_sig_ptrace_errno_trap(int errno, void __user *addr, const char *str);
32
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35
36
37void arm64_skip_faulting_instruction(struct pt_regs *regs, unsigned long size);
38
39static inline int __in_irqentry_text(unsigned long ptr)
40{
41 return ptr >= (unsigned long)&__irqentry_text_start &&
42 ptr < (unsigned long)&__irqentry_text_end;
43}
44
45static inline int in_entry_text(unsigned long ptr)
46{
47 return ptr >= (unsigned long)&__entry_text_start &&
48 ptr < (unsigned long)&__entry_text_end;
49}
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59
60static inline bool arm64_is_ras_serror(u32 esr)
61{
62 WARN_ON(preemptible());
63
64 if (esr & ESR_ELx_IDS)
65 return false;
66
67 if (this_cpu_has_cap(ARM64_HAS_RAS_EXTN))
68 return true;
69 else
70 return false;
71}
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79
80static inline u32 arm64_ras_serror_get_severity(u32 esr)
81{
82 u32 aet = esr & ESR_ELx_AET;
83
84 if (!arm64_is_ras_serror(esr)) {
85
86 return ESR_ELx_AET_UC;
87 }
88
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90
91
92
93 if ((esr & ESR_ELx_FSC) != ESR_ELx_FSC_SERROR) {
94
95 return ESR_ELx_AET_UC;
96 }
97
98 return aet;
99}
100
101bool arm64_is_fatal_ras_serror(struct pt_regs *regs, unsigned int esr);
102void __noreturn arm64_serror_panic(struct pt_regs *regs, u32 esr);
103#endif
104