// SPDX-License-Identifier: GPL-2.0-only/* * Dhrystone benchmark test module * * Copyright (C) 2022 Glider bv */ #include "dhry.h" #include <linux/kernel.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/smp.h> #define DHRY_VAX	1757 static int dhry_run_set(const char *val, const struct kernel_param *kp);static const struct kernel_param_ops run_ops = {	.flags = KERNEL_PARAM_OPS_FL_NOARG,	.set = dhry_run_set,};static bool dhry_run;module_param_cb(run, &run_ops, &dhry_run, 0200);MODULE_PARM_DESC(run, "Run the test (default: false)"); static int iterations = -1;module_param(iterations, int, 0644);MODULE_PARM_DESC(iterations,		"Number of iterations through the benchmark (default: auto)"); static void dhry_benchmark(void){	unsigned int cpu = get_cpu();	int i, n; 	if (iterations > 0) {		n = dhry(iterations);		goto report;	} 	for (i = DHRY_VAX; i > 0; i <<= 1) {		n = dhry(i);		if (n != -EAGAIN)			break;	} report:	put_cpu();	if (n >= 0)		pr_info("CPU%u: Dhrystones per Second: %d (%d DMIPS)\n", cpu,			n, n / DHRY_VAX);	else if (n == -EAGAIN)		pr_err("Please increase the number of iterations\n");	else		pr_err("Dhrystone benchmark failed error %pe\n", ERR_PTR(n));} static int dhry_run_set(const char *val, const struct kernel_param *kp){	int ret; 	if (val) {		ret = param_set_bool(val, kp);		if (ret)			return ret;	} else {		dhry_run = true;	} 	if (dhry_run && system_state == SYSTEM_RUNNING)		dhry_benchmark(); 	return 0;} static int __init dhry_init(void){	if (dhry_run)		dhry_benchmark(); 	return 0;}module_init(dhry_init); MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");MODULE_DESCRIPTION("Dhrystone benchmark test module");MODULE_LICENSE("GPL");