1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Copyright 2015, Michael Ellerman, IBM Corp. 3 * Copyright 2015, Michael Ellerman, IBM Corp.
4 */ 4 */
5 5
6 #ifndef _SELFTESTS_POWERPC_TM_TM_H 6 #ifndef _SELFTESTS_POWERPC_TM_TM_H
7 #define _SELFTESTS_POWERPC_TM_TM_H 7 #define _SELFTESTS_POWERPC_TM_TM_H
8 8
9 #include <stdbool.h> 9 #include <stdbool.h>
10 #include <asm/tm.h> 10 #include <asm/tm.h>
11 11
12 #include "utils.h" 12 #include "utils.h"
13 #include "reg.h" 13 #include "reg.h"
14 14
15 #define TM_RETRIES 100 15 #define TM_RETRIES 100
16 16
17 static inline bool have_htm(void) 17 static inline bool have_htm(void)
18 { 18 {
19 #ifdef PPC_FEATURE2_HTM 19 #ifdef PPC_FEATURE2_HTM
20 return have_hwcap2(PPC_FEATURE2_HTM); 20 return have_hwcap2(PPC_FEATURE2_HTM);
21 #else 21 #else
22 printf("PPC_FEATURE2_HTM not defined, 22 printf("PPC_FEATURE2_HTM not defined, can't check AT_HWCAP2\n");
23 return false; 23 return false;
24 #endif 24 #endif
25 } 25 }
26 26
27 static inline bool have_htm_nosc(void) 27 static inline bool have_htm_nosc(void)
28 { 28 {
29 #ifdef PPC_FEATURE2_HTM_NOSC 29 #ifdef PPC_FEATURE2_HTM_NOSC
30 return have_hwcap2(PPC_FEATURE2_HTM_NO 30 return have_hwcap2(PPC_FEATURE2_HTM_NOSC);
31 #else 31 #else
32 printf("PPC_FEATURE2_HTM_NOSC not defi 32 printf("PPC_FEATURE2_HTM_NOSC not defined, can't check AT_HWCAP2\n");
33 return false; 33 return false;
34 #endif 34 #endif
35 } 35 }
36 36
37 /* 37 /*
38 * Transactional Memory was removed in ISA 3.1 38 * Transactional Memory was removed in ISA 3.1. A synthetic TM implementation
39 * is provided on P10 for threads running in P 39 * is provided on P10 for threads running in P8/P9 compatibility mode. The
40 * synthetic implementation immediately fails 40 * synthetic implementation immediately fails after tbegin. This failure sets
41 * Bit 7 (Failure Persistent) and Bit 15 (Impl 41 * Bit 7 (Failure Persistent) and Bit 15 (Implementation-specific).
42 */ 42 */
43 static inline bool htm_is_synthetic(void) 43 static inline bool htm_is_synthetic(void)
44 { 44 {
45 int i; 45 int i;
46 46
47 /* 47 /*
48 * Per the ISA, the Failure Persistent 48 * Per the ISA, the Failure Persistent bit may be incorrect. Try a few
49 * times in case we got an Implementat 49 * times in case we got an Implementation-specific failure on a non ISA
50 * v3.1 system. On these systems the I 50 * v3.1 system. On these systems the Implementation-specific failure
51 * should not be persistent. 51 * should not be persistent.
52 */ 52 */
53 for (i = 0; i < TM_RETRIES; i++) { 53 for (i = 0; i < TM_RETRIES; i++) {
54 asm volatile( 54 asm volatile(
55 "tbegin.;" 55 "tbegin.;"
56 "beq 1f;" 56 "beq 1f;"
57 "tend.;" 57 "tend.;"
58 "1:" 58 "1:"
59 : 59 :
60 : 60 :
61 : "memory"); 61 : "memory");
62 62
63 if ((__builtin_get_texasr() & 63 if ((__builtin_get_texasr() & (TEXASR_FP | TEXASR_IC)) !=
64 (TEXASR_FP | TEXASR_IC)) 64 (TEXASR_FP | TEXASR_IC))
65 break; 65 break;
66 } 66 }
67 return i == TM_RETRIES; 67 return i == TM_RETRIES;
68 } 68 }
69 69
70 static inline long failure_code(void) 70 static inline long failure_code(void)
71 { 71 {
72 return __builtin_get_texasru() >> 24; 72 return __builtin_get_texasru() >> 24;
73 } 73 }
74 74
75 static inline bool failure_is_persistent(void) 75 static inline bool failure_is_persistent(void)
76 { 76 {
77 return (failure_code() & TM_CAUSE_PERS 77 return (failure_code() & TM_CAUSE_PERSISTENT) == TM_CAUSE_PERSISTENT;
78 } 78 }
79 79
80 static inline bool failure_is_syscall(void) 80 static inline bool failure_is_syscall(void)
81 { 81 {
82 return (failure_code() & TM_CAUSE_SYSC 82 return (failure_code() & TM_CAUSE_SYSCALL) == TM_CAUSE_SYSCALL;
83 } 83 }
84 84
85 static inline bool failure_is_unavailable(void 85 static inline bool failure_is_unavailable(void)
86 { 86 {
87 return (failure_code() & TM_CAUSE_FAC_ 87 return (failure_code() & TM_CAUSE_FAC_UNAV) == TM_CAUSE_FAC_UNAV;
88 } 88 }
89 89
90 static inline bool failure_is_reschedule(void) 90 static inline bool failure_is_reschedule(void)
91 { 91 {
92 if ((failure_code() & TM_CAUSE_RESCHED 92 if ((failure_code() & TM_CAUSE_RESCHED) == TM_CAUSE_RESCHED ||
93 (failure_code() & TM_CAUSE_KVM_RES 93 (failure_code() & TM_CAUSE_KVM_RESCHED) == TM_CAUSE_KVM_RESCHED ||
94 (failure_code() & TM_CAUSE_KVM_FAC 94 (failure_code() & TM_CAUSE_KVM_FAC_UNAV) == TM_CAUSE_KVM_FAC_UNAV)
95 return true; 95 return true;
96 96
97 return false; 97 return false;
98 } 98 }
99 99
100 static inline bool failure_is_nesting(void) 100 static inline bool failure_is_nesting(void)
101 { 101 {
102 return (__builtin_get_texasru() & 0x40 102 return (__builtin_get_texasru() & 0x400000);
103 } 103 }
104 104
105 static inline int tcheck(void) 105 static inline int tcheck(void)
106 { 106 {
107 long cr; 107 long cr;
108 asm volatile ("tcheck 0" : "=r"(cr) : 108 asm volatile ("tcheck 0" : "=r"(cr) : : "cr0");
109 return (cr >> 28) & 4; 109 return (cr >> 28) & 4;
110 } 110 }
111 111
112 static inline bool tcheck_doomed(void) 112 static inline bool tcheck_doomed(void)
113 { 113 {
114 return tcheck() & 8; 114 return tcheck() & 8;
115 } 115 }
116 116
117 static inline bool tcheck_active(void) 117 static inline bool tcheck_active(void)
118 { 118 {
119 return tcheck() & 4; 119 return tcheck() & 4;
120 } 120 }
121 121
122 static inline bool tcheck_suspended(void) 122 static inline bool tcheck_suspended(void)
123 { 123 {
124 return tcheck() & 2; 124 return tcheck() & 2;
125 } 125 }
126 126
127 static inline bool tcheck_transactional(void) 127 static inline bool tcheck_transactional(void)
128 { 128 {
129 return tcheck() & 6; 129 return tcheck() & 6;
130 } 130 }
131 131
132 #endif /* _SELFTESTS_POWERPC_TM_TM_H */ 132 #endif /* _SELFTESTS_POWERPC_TM_TM_H */
133 133
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.