1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2015, Michael Ellerman, IBM Corp.
4  */
5 
6 #ifndef _SELFTESTS_POWERPC_TM_TM_H
7 #define _SELFTESTS_POWERPC_TM_TM_H
8 
9 #include <asm/tm.h>
10 #include <asm/cputable.h>
11 #include <stdbool.h>
12 
13 #include "utils.h"
14 
15 static inline bool have_htm(void)
16 {
17 #ifdef PPC_FEATURE2_HTM
18 	return have_hwcap2(PPC_FEATURE2_HTM);
19 #else
20 	printf("PPC_FEATURE2_HTM not defined, can't check AT_HWCAP2\n");
21 	return false;
22 #endif
23 }
24 
25 static inline bool have_htm_nosc(void)
26 {
27 #ifdef PPC_FEATURE2_HTM_NOSC
28 	return have_hwcap2(PPC_FEATURE2_HTM_NOSC);
29 #else
30 	printf("PPC_FEATURE2_HTM_NOSC not defined, can't check AT_HWCAP2\n");
31 	return false;
32 #endif
33 }
34 
35 static inline long failure_code(void)
36 {
37 	return __builtin_get_texasru() >> 24;
38 }
39 
40 static inline bool failure_is_persistent(void)
41 {
42 	return (failure_code() & TM_CAUSE_PERSISTENT) == TM_CAUSE_PERSISTENT;
43 }
44 
45 static inline bool failure_is_syscall(void)
46 {
47 	return (failure_code() & TM_CAUSE_SYSCALL) == TM_CAUSE_SYSCALL;
48 }
49 
50 static inline bool failure_is_unavailable(void)
51 {
52 	return (failure_code() & TM_CAUSE_FAC_UNAV) == TM_CAUSE_FAC_UNAV;
53 }
54 
55 static inline bool failure_is_reschedule(void)
56 {
57 	if ((failure_code() & TM_CAUSE_RESCHED) == TM_CAUSE_RESCHED ||
58 	    (failure_code() & TM_CAUSE_KVM_RESCHED) == TM_CAUSE_KVM_RESCHED ||
59 	    (failure_code() & TM_CAUSE_KVM_FAC_UNAV) == TM_CAUSE_KVM_FAC_UNAV)
60 		return true;
61 
62 	return false;
63 }
64 
65 static inline bool failure_is_nesting(void)
66 {
67 	return (__builtin_get_texasru() & 0x400000);
68 }
69 
70 static inline int tcheck(void)
71 {
72 	long cr;
73 	asm volatile ("tcheck 0" : "=r"(cr) : : "cr0");
74 	return (cr >> 28) & 4;
75 }
76 
77 static inline bool tcheck_doomed(void)
78 {
79 	return tcheck() & 8;
80 }
81 
82 static inline bool tcheck_active(void)
83 {
84 	return tcheck() & 4;
85 }
86 
87 static inline bool tcheck_suspended(void)
88 {
89 	return tcheck() & 2;
90 }
91 
92 static inline bool tcheck_transactional(void)
93 {
94 	return tcheck() & 6;
95 }
96 
97 #endif /* _SELFTESTS_POWERPC_TM_TM_H */
98