1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2015, Michael Neuling, IBM Corp.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Original: Michael Neuling 3/4/2014
6*4882a593Smuzhiyun * Modified: Rashmica Gupta 8/12/2015
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Check if any of the Transaction Memory SPRs get corrupted.
9*4882a593Smuzhiyun * - TFIAR - stores address of location of transaction failure
10*4882a593Smuzhiyun * - TFHAR - stores address of software failure handler (if transaction
11*4882a593Smuzhiyun * fails)
12*4882a593Smuzhiyun * - TEXASR - lots of info about the transacion(s)
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * (1) create more threads than cpus
15*4882a593Smuzhiyun * (2) in each thread:
16*4882a593Smuzhiyun * (a) set TFIAR and TFHAR a unique value
17*4882a593Smuzhiyun * (b) loop for awhile, continually checking to see if
18*4882a593Smuzhiyun * either register has been corrupted.
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * (3) Loop:
21*4882a593Smuzhiyun * (a) begin transaction
22*4882a593Smuzhiyun * (b) abort transaction
23*4882a593Smuzhiyun * (c) check TEXASR to see if FS has been corrupted
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define _GNU_SOURCE
27*4882a593Smuzhiyun #include <stdio.h>
28*4882a593Smuzhiyun #include <stdlib.h>
29*4882a593Smuzhiyun #include <unistd.h>
30*4882a593Smuzhiyun #include <pthread.h>
31*4882a593Smuzhiyun #include <string.h>
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #include "utils.h"
34*4882a593Smuzhiyun #include "tm.h"
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun int num_loops = 1000000;
37*4882a593Smuzhiyun int passed = 1;
38*4882a593Smuzhiyun
tfiar_tfhar(void * in)39*4882a593Smuzhiyun void tfiar_tfhar(void *in)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun unsigned long tfhar, tfhar_rd, tfiar, tfiar_rd;
42*4882a593Smuzhiyun int i;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* TFIAR: Last bit has to be high so userspace can read register */
45*4882a593Smuzhiyun tfiar = ((unsigned long)in) + 1;
46*4882a593Smuzhiyun tfiar += 2;
47*4882a593Smuzhiyun mtspr(SPRN_TFIAR, tfiar);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun /* TFHAR: Last two bits are reserved */
50*4882a593Smuzhiyun tfhar = ((unsigned long)in);
51*4882a593Smuzhiyun tfhar &= ~0x3UL;
52*4882a593Smuzhiyun tfhar += 4;
53*4882a593Smuzhiyun mtspr(SPRN_TFHAR, tfhar);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun for (i = 0; i < num_loops; i++) {
56*4882a593Smuzhiyun tfhar_rd = mfspr(SPRN_TFHAR);
57*4882a593Smuzhiyun tfiar_rd = mfspr(SPRN_TFIAR);
58*4882a593Smuzhiyun if ( (tfhar != tfhar_rd) || (tfiar != tfiar_rd) ) {
59*4882a593Smuzhiyun passed = 0;
60*4882a593Smuzhiyun return;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun return;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
texasr(void * in)66*4882a593Smuzhiyun void texasr(void *in)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun unsigned long i;
69*4882a593Smuzhiyun uint64_t result = 0;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun for (i = 0; i < num_loops; i++) {
72*4882a593Smuzhiyun asm __volatile__(
73*4882a593Smuzhiyun "tbegin.;"
74*4882a593Smuzhiyun "beq 3f ;"
75*4882a593Smuzhiyun "tabort. 0 ;"
76*4882a593Smuzhiyun "tend.;"
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun /* Abort handler */
79*4882a593Smuzhiyun "3: ;"
80*4882a593Smuzhiyun ::: "memory");
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun /* Check the TEXASR */
83*4882a593Smuzhiyun result = mfspr(SPRN_TEXASR);
84*4882a593Smuzhiyun if ((result & TEXASR_FS) == 0) {
85*4882a593Smuzhiyun passed = 0;
86*4882a593Smuzhiyun return;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun return;
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun
test_tmspr()92*4882a593Smuzhiyun int test_tmspr()
93*4882a593Smuzhiyun {
94*4882a593Smuzhiyun pthread_t *thread;
95*4882a593Smuzhiyun int thread_num;
96*4882a593Smuzhiyun unsigned long i;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun SKIP_IF(!have_htm());
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /* To cause some context switching */
101*4882a593Smuzhiyun thread_num = 10 * sysconf(_SC_NPROCESSORS_ONLN);
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun thread = malloc(thread_num * sizeof(pthread_t));
104*4882a593Smuzhiyun if (thread == NULL)
105*4882a593Smuzhiyun return EXIT_FAILURE;
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun /* Test TFIAR and TFHAR */
108*4882a593Smuzhiyun for (i = 0; i < thread_num; i += 2) {
109*4882a593Smuzhiyun if (pthread_create(&thread[i], NULL, (void *)tfiar_tfhar,
110*4882a593Smuzhiyun (void *)i))
111*4882a593Smuzhiyun return EXIT_FAILURE;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun /* Test TEXASR */
114*4882a593Smuzhiyun for (i = 1; i < thread_num; i += 2) {
115*4882a593Smuzhiyun if (pthread_create(&thread[i], NULL, (void *)texasr, (void *)i))
116*4882a593Smuzhiyun return EXIT_FAILURE;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun for (i = 0; i < thread_num; i++) {
120*4882a593Smuzhiyun if (pthread_join(thread[i], NULL) != 0)
121*4882a593Smuzhiyun return EXIT_FAILURE;
122*4882a593Smuzhiyun }
123*4882a593Smuzhiyun
124*4882a593Smuzhiyun free(thread);
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun if (passed)
127*4882a593Smuzhiyun return 0;
128*4882a593Smuzhiyun else
129*4882a593Smuzhiyun return 1;
130*4882a593Smuzhiyun }
131*4882a593Smuzhiyun
main(int argc,char * argv[])132*4882a593Smuzhiyun int main(int argc, char *argv[])
133*4882a593Smuzhiyun {
134*4882a593Smuzhiyun if (argc > 1) {
135*4882a593Smuzhiyun if (strcmp(argv[1], "-h") == 0) {
136*4882a593Smuzhiyun printf("Syntax:\t [<num loops>]\n");
137*4882a593Smuzhiyun return 0;
138*4882a593Smuzhiyun } else {
139*4882a593Smuzhiyun num_loops = atoi(argv[1]);
140*4882a593Smuzhiyun }
141*4882a593Smuzhiyun }
142*4882a593Smuzhiyun return test_harness(test_tmspr, "tm_tmspr");
143*4882a593Smuzhiyun }
144