linux/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
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   1/*
   2 * Ptrace test for VMX/VSX registers in the TM Suspend context
   3 *
   4 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11#include "ptrace.h"
  12#include "tm.h"
  13#include "ptrace-vsx.h"
  14
  15int shm_id;
  16int *cptr, *pptr;
  17
  18unsigned long fp_load[VEC_MAX];
  19unsigned long fp_load_new[VEC_MAX];
  20unsigned long fp_store[VEC_MAX];
  21unsigned long fp_load_ckpt[VEC_MAX];
  22unsigned long fp_load_ckpt_new[VEC_MAX];
  23
  24__attribute__((used)) void load_vsx(void)
  25{
  26        loadvsx(fp_load, 0);
  27}
  28
  29__attribute__((used)) void load_vsx_new(void)
  30{
  31        loadvsx(fp_load_new, 0);
  32}
  33
  34__attribute__((used)) void load_vsx_ckpt(void)
  35{
  36        loadvsx(fp_load_ckpt, 0);
  37}
  38
  39__attribute__((used)) void wait_parent(void)
  40{
  41        cptr[2] = 1;
  42        while (!cptr[1])
  43                asm volatile("" : : : "memory");
  44}
  45
  46void tm_spd_vsx(void)
  47{
  48        unsigned long result, texasr;
  49        int ret;
  50
  51        cptr = (int *)shmat(shm_id, NULL, 0);
  52
  53trans:
  54        cptr[2] = 0;
  55        asm __volatile__(
  56                "bl load_vsx_ckpt;"
  57
  58                "1: ;"
  59                "tbegin.;"
  60                "beq 2f;"
  61
  62                "bl load_vsx_new;"
  63                "tsuspend.;"
  64                "bl load_vsx;"
  65                "bl wait_parent;"
  66                "tresume.;"
  67
  68                "tend.;"
  69                "li 0, 0;"
  70                "ori %[res], 0, 0;"
  71                "b 3f;"
  72
  73                "2: ;"
  74                "li 0, 1;"
  75                "ori %[res], 0, 0;"
  76                "mfspr %[texasr], %[sprn_texasr];"
  77
  78                "3: ;"
  79                : [res] "=r" (result), [texasr] "=r" (texasr)
  80                : [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
  81                [sprn_texasr] "i"  (SPRN_TEXASR)
  82                : "memory", "r0", "r1", "r3", "r4",
  83                "r7", "r8", "r9", "r10", "r11"
  84                );
  85
  86        if (result) {
  87                if (!cptr[0])
  88                        goto trans;
  89                shmdt((void *)cptr);
  90
  91                storevsx(fp_store, 0);
  92                ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
  93                if (ret)
  94                        exit(1);
  95                exit(0);
  96        }
  97        shmdt((void *)cptr);
  98        exit(1);
  99}
 100
 101int trace_tm_spd_vsx(pid_t child)
 102{
 103        unsigned long vsx[VSX_MAX];
 104        unsigned long vmx[VMX_MAX + 2][2];
 105
 106        FAIL_IF(start_trace(child));
 107        FAIL_IF(show_vsx(child, vsx));
 108        FAIL_IF(validate_vsx(vsx, fp_load));
 109        FAIL_IF(show_vmx(child, vmx));
 110        FAIL_IF(validate_vmx(vmx, fp_load));
 111        FAIL_IF(show_vsx_ckpt(child, vsx));
 112        FAIL_IF(validate_vsx(vsx, fp_load_ckpt));
 113        FAIL_IF(show_vmx_ckpt(child, vmx));
 114        FAIL_IF(validate_vmx(vmx, fp_load_ckpt));
 115
 116        memset(vsx, 0, sizeof(vsx));
 117        memset(vmx, 0, sizeof(vmx));
 118
 119        load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
 120
 121        FAIL_IF(write_vsx_ckpt(child, vsx));
 122        FAIL_IF(write_vmx_ckpt(child, vmx));
 123
 124        pptr[0] = 1;
 125        pptr[1] = 1;
 126        FAIL_IF(stop_trace(child));
 127
 128        return TEST_PASS;
 129}
 130
 131int ptrace_tm_spd_vsx(void)
 132{
 133        pid_t pid;
 134        int ret, status, i;
 135
 136        SKIP_IF(!have_htm());
 137        shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
 138
 139        for (i = 0; i < 128; i++) {
 140                fp_load[i] = 1 + rand();
 141                fp_load_new[i] = 1 + 2 * rand();
 142                fp_load_ckpt[i] = 1 + 3 * rand();
 143                fp_load_ckpt_new[i] = 1 + 4 * rand();
 144        }
 145
 146        pid = fork();
 147        if (pid < 0) {
 148                perror("fork() failed");
 149                return TEST_FAIL;
 150        }
 151
 152        if (pid == 0)
 153                tm_spd_vsx();
 154
 155        if (pid) {
 156                pptr = (int *)shmat(shm_id, NULL, 0);
 157                while (!pptr[2])
 158                        asm volatile("" : : : "memory");
 159
 160                ret = trace_tm_spd_vsx(pid);
 161                if (ret) {
 162                        kill(pid, SIGKILL);
 163                        shmdt((void *)pptr);
 164                        shmctl(shm_id, IPC_RMID, NULL);
 165                        return TEST_FAIL;
 166                }
 167
 168                shmdt((void *)pptr);
 169                ret = wait(&status);
 170                shmctl(shm_id, IPC_RMID, NULL);
 171                if (ret != pid) {
 172                        printf("Child's exit status not captured\n");
 173                        return TEST_FAIL;
 174                }
 175
 176                return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
 177                        TEST_PASS;
 178        }
 179        return TEST_PASS;
 180}
 181
 182int main(int argc, char *argv[])
 183{
 184        return test_harness(ptrace_tm_spd_vsx, "ptrace_tm_spd_vsx");
 185}
 186