root/tools/testing/selftests/powerpc/tm/tm.h

INCLUDED FROM

DEFINITIONS

1. have_htm
2. have_htm_nosc
3. failure_code
4. failure_is_persistent
5. failure_is_syscall
6. failure_is_unavailable
7. failure_is_reschedule
8. failure_is_nesting
9. tcheck
10. tcheck_doomed
11. tcheck_active
12. tcheck_suspended
13. tcheck_transactional

   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 */