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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");
}
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