1 /*-
2  *   BSD LICENSE
3  *
4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5  *   All rights reserved.
6  *
7  *   Redistribution and use in source and binary forms, with or without
8  *   modification, are permitted provided that the following conditions
9  *   are met:
10  *
11  *     * Redistributions of source code must retain the above copyright
12  *       notice, this list of conditions and the following disclaimer.
13  *     * Redistributions in binary form must reproduce the above copyright
14  *       notice, this list of conditions and the following disclaimer in
15  *       the documentation and/or other materials provided with the
16  *       distribution.
17  *     * Neither the name of Intel Corporation nor the names of its
18  *       contributors may be used to endorse or promote products derived
19  *       from this software without specific prior written permission.
20  *
21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include <stdio.h>
35 
36 #include <rte_common.h>
37 #include <rte_cpuflags.h>
38 
39 /**
40  * Checks if the machine is adequate for running the binary. If it is not, the
41  * program exits with status 1.
42  */
43 void
44 rte_cpu_check_supported(void)
45 {
46 	if (!rte_cpu_is_supported())
47 		exit(1);
48 }
49 
50 int
51 rte_cpu_is_supported(void)
52 {
53 	/* This is generated at compile-time by the build system */
54 	static const enum rte_cpu_flag_t compile_time_flags[] = {
55 			RTE_COMPILE_TIME_CPUFLAGS
56 	};
57 	unsigned count = RTE_DIM(compile_time_flags), i;
58 	int ret;
59 
60 	for (i = 0; i < count; i++) {
61 		ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
62 
63 		if (ret < 0) {
64 			fprintf(stderr,
65 				"ERROR: CPU feature flag lookup failed with error %d\n",
66 				ret);
67 			return 0;
68 		}
69 		if (!ret) {
70 			fprintf(stderr,
71 			        "ERROR: This system does not support \"%s\".\n"
72 			        "Please check that RTE_MACHINE is set correctly.\n",
73 			        rte_cpu_get_flag_name(compile_time_flags[i]));
74 			return 0;
75 		}
76 	}
77 
78 	return 1;
79 }
80