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| // SPDX-License-Identifier: GPL-2.0-or-later
| /*
| * Copyright 2015, Cyril Bur, IBM Corp.
| *
| * This test attempts to see if the VMX registers change across a syscall (fork).
| */
|
| #include <altivec.h>
| #include <stdio.h>
| #include <unistd.h>
| #include <sys/syscall.h>
| #include <sys/time.h>
| #include <stdlib.h>
| #include <sys/types.h>
| #include <sys/wait.h>
| #include "utils.h"
|
| vector int varray[] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10,11,12},
| {13,14,15,16},{17,18,19,20},{21,22,23,24},
| {25,26,27,28},{29,30,31,32},{33,34,35,36},
| {37,38,39,40},{41,42,43,44},{45,46,47,48}};
|
| extern int test_vmx(vector int *varray, pid_t *pid);
|
| int vmx_syscall(void)
| {
| pid_t fork_pid;
| int i;
| int ret;
| int child_ret;
| for (i = 0; i < 1000; i++) {
| /* test_vmx will fork() */
| ret = test_vmx(varray, &fork_pid);
| if (fork_pid == -1)
| return -1;
| if (fork_pid == 0)
| exit(ret);
| waitpid(fork_pid, &child_ret, 0);
| if (ret || child_ret)
| return 1;
| }
|
| return 0;
| }
|
| int test_vmx_syscall(void)
| {
| /*
| * Setup an environment with much context switching
| */
| pid_t pid2;
| pid_t pid;
| int ret;
| int child_ret;
|
| // vcmpequd used in vmx_asm.S is v2.07
| SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
|
| pid = fork();
| FAIL_IF(pid == -1);
|
| pid2 = fork();
| ret = vmx_syscall();
| /* Can't FAIL_IF(pid2 == -1); because we've already forked */
| if (pid2 == -1) {
| /*
| * Couldn't fork, ensure child_ret is set and is a fail
| */
| ret = child_ret = 1;
| } else {
| if (pid2)
| waitpid(pid2, &child_ret, 0);
| else
| exit(ret);
| }
|
| ret |= child_ret;
|
| if (pid)
| waitpid(pid, &child_ret, 0);
| else
| exit(ret);
|
| FAIL_IF(ret || child_ret);
| return 0;
| }
|
| int main(int argc, char *argv[])
| {
| return test_harness(test_vmx_syscall, "vmx_syscall");
|
| }
|
|
