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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2022 ARM Limited.
* Original author: Mark Brown <broonie@kernel.org>
*/
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/sched.h>
#include <linux/wait.h>
#define EXPECTED_TESTS 1
static void putstr(const char *str)
{
write(1, str, strlen(str));
}
static void putnum(unsigned int num)
{
char c;
if (num / 10)
putnum(num / 10);
c = '0' + (num % 10);
write(1, &c, 1);
}
static int tests_run;
static int tests_passed;
static int tests_failed;
static int tests_skipped;
static void print_summary(void)
{
if (tests_passed + tests_failed + tests_skipped != EXPECTED_TESTS)
putstr("# UNEXPECTED TEST COUNT: ");
putstr("# Totals: pass:");
putnum(tests_passed);
putstr(" fail:");
putnum(tests_failed);
putstr(" xfail:0 xpass:0 skip:");
putnum(tests_skipped);
putstr(" error:0\n");
}
int fork_test(void);
int verify_fork(void);
/*
* If we fork the value in the parent should be unchanged and the
* child should start with the same value. This is called from the
* fork_test() asm function.
*/
int fork_test_c(void)
{
pid_t newpid, waiting;
int child_status, parent_result;
newpid = fork();
if (newpid == 0) {
/* In child */
if (!verify_fork()) {
putstr("# ZA state invalid in child\n");
exit(0);
} else {
exit(1);
}
}
if (newpid < 0) {
putstr("# fork() failed: -");
putnum(-newpid);
putstr("\n");
return 0;
}
parent_result = verify_fork();
if (!parent_result)
putstr("# ZA state invalid in parent\n");
for (;;) {
waiting = waitpid(newpid, &child_status, 0);
if (waiting < 0) {
if (errno == EINTR)
continue;
putstr("# waitpid() failed: ");
putnum(errno);
putstr("\n");
return 0;
}
if (waiting != newpid) {
putstr("# waitpid() returned wrong PID\n");
return 0;
}
if (!WIFEXITED(child_status)) {
putstr("# child did not exit\n");
return 0;
}
return WEXITSTATUS(child_status) && parent_result;
}
}
#define run_test(name) \
if (name()) { \
tests_passed++; \
} else { \
tests_failed++; \
putstr("not "); \
} \
putstr("ok "); \
putnum(++tests_run); \
putstr(" " #name "\n");
int main(int argc, char **argv)
{
int ret, i;
putstr("TAP version 13\n");
putstr("1..");
putnum(EXPECTED_TESTS);
putstr("\n");
putstr("# PID: ");
putnum(getpid());
putstr("\n");
/*
* This test is run with nolibc which doesn't support hwcap and
* it's probably disproportionate to implement so instead check
* for the default vector length configuration in /proc.
*/
ret = open("/proc/sys/abi/sme_default_vector_length", O_RDONLY, 0);
if (ret >= 0) {
run_test(fork_test);
} else {
putstr("# SME support not present\n");
for (i = 0; i < EXPECTED_TESTS; i++) {
putstr("ok ");
putnum(i);
putstr(" skipped\n");
}
tests_skipped += EXPECTED_TESTS;
}
print_summary();
return 0;
}
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