tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
15static 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
25static 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
35static inline long failure_code(void)
36{
37 return __builtin_get_texasru() >> 24;
38}
39
40static inline bool failure_is_persistent(void)
41{
42 return (failure_code() & TM_CAUSE_PERSISTENT) == TM_CAUSE_PERSISTENT;
43}
44
45static inline bool failure_is_syscall(void)
46{
47 return (failure_code() & TM_CAUSE_SYSCALL) == TM_CAUSE_SYSCALL;
48}
49
50static inline bool failure_is_unavailable(void)
51{
52 return (failure_code() & TM_CAUSE_FAC_UNAV) == TM_CAUSE_FAC_UNAV;
53}
54
55static 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
65static inline bool failure_is_nesting(void)
66{
67 return (__builtin_get_texasru() & 0x400000);
68}
69
70static inline int tcheck(void)
71{
72 long cr;
73 asm volatile ("tcheck 0" : "=r"(cr) : : "cr0");
74 return (cr >> 28) & 4;
75}
76
77static inline bool tcheck_doomed(void)
78{
79 return tcheck() & 8;
80}
81
82static inline bool tcheck_active(void)
83{
84 return tcheck() & 4;
85}
86
87static inline bool tcheck_suspended(void)
88{
89 return tcheck() & 2;
90}
91
92static inline bool tcheck_transactional(void)
93{
94 return tcheck() & 6;
95}
96
97#endif /* _SELFTESTS_POWERPC_TM_TM_H */