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selftests/powerpc: Skip tm-unavailable if TM is not enabled

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Some processor revisions do not support transactional memory, and
additionally kernel support can be disabled. In either case the
tm-unavailable test should be skipped, otherwise it will fail with
a SIGILL.

That commit also sets this selftest to be called through the test
harness as it's done for other TM selftests.

Finally, it avoids using "ping" as a thread name since it's
ambiguous and can be confusing when shown, for instance,
in a kernel backtrace log.

Fixes: 77fad8bfb1d2 ("selftests/powerpc: Check FP/VEC on exception in TM")
Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com>
Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Gustavo Romero 2018-03-05 15:48:55 -05:00 committed by Michael Ellerman
parent 58935176ad
commit b395e55b49
1 changed files with 16 additions and 8 deletions
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24
tools/testing/selftests/powerpc/tm/tm-unavailable.c
View File

@ -80,7 +80,7 @@ bool is_failure(uint64_t condition_reg)
return ((condition_reg >> 28) & 0xa) == 0xa;
}
void *ping(void *input)
void *tm_una_ping(void *input)
{
/*
@ -280,7 +280,7 @@ void *ping(void *input)
}
/* Thread to force context switch */
void *pong(void *not_used)
void *tm_una_pong(void *not_used)
{
/* Wait thread get its name "pong". */
if (DEBUG)
@ -311,11 +311,11 @@ void test_fp_vec(int fp, int vec, pthread_attr_t *attr)
do {
int rc;
/* Bind 'ping' to CPU 0, as specified in 'attr'. */
rc = pthread_create(&t0, attr, ping, (void *) &flags);
/* Bind to CPU 0, as specified in 'attr'. */
rc = pthread_create(&t0, attr, tm_una_ping, (void *) &flags);
if (rc)
pr_err(rc, "pthread_create()");
rc = pthread_setname_np(t0, "ping");
rc = pthread_setname_np(t0, "tm_una_ping");
if (rc)
pr_warn(rc, "pthread_setname_np");
rc = pthread_join(t0, &ret_value);
@ -333,13 +333,15 @@ void test_fp_vec(int fp, int vec, pthread_attr_t *attr)
}
}
int main(int argc, char **argv)
int tm_unavailable_test(void)
{
int rc, exception; /* FP = 0, VEC = 1, VSX = 2 */
pthread_t t1;
pthread_attr_t attr;
cpu_set_t cpuset;
SKIP_IF(!have_htm());
/* Set only CPU 0 in the mask. Both threads will be bound to CPU 0. */
CPU_ZERO(&cpuset);
CPU_SET(0, &cpuset);
@ -354,12 +356,12 @@ int main(int argc, char **argv)
if (rc)
pr_err(rc, "pthread_attr_setaffinity_np()");
rc = pthread_create(&t1, &attr /* Bind 'pong' to CPU 0 */, pong, NULL);
rc = pthread_create(&t1, &attr /* Bind to CPU 0 */, tm_una_pong, NULL);
if (rc)
pr_err(rc, "pthread_create()");
/* Name it for systemtap convenience */
rc = pthread_setname_np(t1, "pong");
rc = pthread_setname_np(t1, "tm_una_pong");
if (rc)
pr_warn(rc, "pthread_create()");
@ -394,3 +396,9 @@ int main(int argc, char **argv)
exit(0);
}
}
int main(int argc, char **argv)
{
test_harness_set_timeout(220);
return test_harness(tm_unavailable_test, "tm_unavailable_test");
}