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      1 /*
      2  * Copyright 2015, Michael Ellerman, IBM Corp.
      3  * Licensed under GPLv2.
      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 		return true;
     60 
     61 	return false;
     62 }
     63 
     64 static inline bool failure_is_nesting(void)
     65 {
     66 	return (__builtin_get_texasru() & 0x400000);
     67 }
     68 
     69 static inline int tcheck(void)
     70 {
     71 	long cr;
     72 	asm volatile ("tcheck 0" : "=r"(cr) : : "cr0");
     73 	return (cr >> 28) & 4;
     74 }
     75 
     76 static inline bool tcheck_doomed(void)
     77 {
     78 	return tcheck() & 8;
     79 }
     80 
     81 static inline bool tcheck_active(void)
     82 {
     83 	return tcheck() & 4;
     84 }
     85 
     86 static inline bool tcheck_suspended(void)
     87 {
     88 	return tcheck() & 2;
     89 }
     90 
     91 static inline bool tcheck_transactional(void)
     92 {
     93 	return tcheck() & 6;
     94 }
     95 
     96 #endif /* _SELFTESTS_POWERPC_TM_TM_H */
     97