151 lines
3 KiB
C
151 lines
3 KiB
C
/*
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* Copyright 2015, Michael Neuling, IBM Corp.
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* Licensed under GPLv2.
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*
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* Original: Michael Neuling 3/4/2014
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* Modified: Rashmica Gupta 8/12/2015
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*
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* Check if any of the Transaction Memory SPRs get corrupted.
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* - TFIAR - stores address of location of transaction failure
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* - TFHAR - stores address of software failure handler (if transaction
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* fails)
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* - TEXASR - lots of info about the transacion(s)
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*
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* (1) create more threads than cpus
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* (2) in each thread:
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* (a) set TFIAR and TFHAR a unique value
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* (b) loop for awhile, continually checking to see if
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* either register has been corrupted.
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*
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* (3) Loop:
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* (a) begin transaction
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* (b) abort transaction
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* (c) check TEXASR to see if FS has been corrupted
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*
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <string.h>
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#include "utils.h"
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#include "tm.h"
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int num_loops = 10000;
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int passed = 1;
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void tfiar_tfhar(void *in)
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{
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int i, cpu;
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unsigned long tfhar, tfhar_rd, tfiar, tfiar_rd;
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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cpu = (unsigned long)in >> 1;
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CPU_SET(cpu, &cpuset);
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sched_setaffinity(0, sizeof(cpuset), &cpuset);
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/* TFIAR: Last bit has to be high so userspace can read register */
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tfiar = ((unsigned long)in) + 1;
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tfiar += 2;
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mtspr(SPRN_TFIAR, tfiar);
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/* TFHAR: Last two bits are reserved */
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tfhar = ((unsigned long)in);
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tfhar &= ~0x3UL;
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tfhar += 4;
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mtspr(SPRN_TFHAR, tfhar);
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for (i = 0; i < num_loops; i++) {
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tfhar_rd = mfspr(SPRN_TFHAR);
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tfiar_rd = mfspr(SPRN_TFIAR);
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if ( (tfhar != tfhar_rd) || (tfiar != tfiar_rd) ) {
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passed = 0;
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return;
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}
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}
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return;
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}
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void texasr(void *in)
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{
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unsigned long i;
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uint64_t result = 0;
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for (i = 0; i < num_loops; i++) {
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asm __volatile__(
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"tbegin.;"
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"beq 3f ;"
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"tabort. 0 ;"
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"tend.;"
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/* Abort handler */
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"3: ;"
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::: "memory");
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/* Check the TEXASR */
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result = mfspr(SPRN_TEXASR);
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if ((result & TEXASR_FS) == 0) {
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passed = 0;
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return;
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}
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}
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return;
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}
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int test_tmspr()
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{
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pthread_t *thread;
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int thread_num;
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unsigned long i;
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SKIP_IF(!have_htm());
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/* To cause some context switching */
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thread_num = 10 * sysconf(_SC_NPROCESSORS_ONLN);
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thread = malloc(thread_num * sizeof(pthread_t));
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if (thread == NULL)
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return EXIT_FAILURE;
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/* Test TFIAR and TFHAR */
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for (i = 0; i < thread_num; i += 2) {
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if (pthread_create(&thread[i], NULL, (void *)tfiar_tfhar,
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(void *)i))
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return EXIT_FAILURE;
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}
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/* Test TEXASR */
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for (i = 1; i < thread_num; i += 2) {
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if (pthread_create(&thread[i], NULL, (void *)texasr, (void *)i))
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return EXIT_FAILURE;
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}
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for (i = 0; i < thread_num; i++) {
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if (pthread_join(thread[i], NULL) != 0)
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return EXIT_FAILURE;
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}
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free(thread);
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if (passed)
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return 0;
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else
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return 1;
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}
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int main(int argc, char *argv[])
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{
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if (argc > 1) {
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if (strcmp(argv[1], "-h") == 0) {
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printf("Syntax:\t [<num loops>]\n");
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return 0;
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} else {
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num_loops = atoi(argv[1]);
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}
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}
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return test_harness(test_tmspr, "tm_tmspr");
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}
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