traploop.c

 1// SPDX-License-Identifier: GPL-2.0
 2#include <stdlib.h>
 3#include "../tests.h"
 4
 5#define BENCH_RUNS 999999
 6
 7#ifdef __aarch64__
 8static void trap_bench(void)
 9{
10	unsigned long val;
11
12	asm("mrs %0, ID_AA64ISAR0_EL1" : "=r" (val));   /* TRAP + ERET */
13}
14#else
15static void trap_bench(void) { }
16#endif
17
18static int traploop(int argc, const char **argv)
19{
20	int num_loops = BENCH_RUNS;
21
22	if (argc > 0)
23		num_loops = atoi(argv[0]);
24
25	for (int i = 0; i < num_loops; i++)
26		trap_bench();
27
28	return 0;
29}
30
31DEFINE_WORKLOAD(traploop);