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1 /*
2  * Copyright (C) 2013 Linux Test Project
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of version 2 of the GNU General Public
6  * License as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it would be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11  *
12  * Further, this software is distributed without any warranty that it
13  * is free of the rightful claim of any third person regarding
14  * infringement or the like.  Any license provided herein, whether
15  * implied or otherwise, applies only to this software file.  Patent
16  * licenses, if any, provided herein do not apply to combinations of
17  * this program with other software, or any other product whatsoever.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22  * 02110-1301, USA.
23  */
24 
25 #include <unistd.h>
26 #include "test.h"
27 #include "safe_macros.h"
28 
is_kvm(void)29 static int is_kvm(void)
30 {
31 	FILE *cpuinfo;
32 	char line[64];
33 	int found;
34 
35 	/* this doesn't work with custom -cpu values, since there's
36 	 * no easy, reasonable or reliable way to work around those */
37 	cpuinfo = SAFE_FOPEN(NULL, "/proc/cpuinfo", "r");
38 	found = 0;
39 	while (fgets(line, sizeof(line), cpuinfo) != NULL) {
40 		if (strstr(line, "QEMU Virtual CPU")) {
41 			found = 1;
42 			break;
43 		}
44 	}
45 
46 	SAFE_FCLOSE(NULL, cpuinfo);
47 	return found;
48 }
49 
is_xen(void)50 static int is_xen(void)
51 {
52 	char hypervisor_type[3];
53 
54 	if (access("/proc/xen", F_OK) == 0)
55 		return 1;
56 
57 	if (access("/sys/hypervisor/type", F_OK) == 0) {
58 		SAFE_FILE_SCANF(NULL, "/sys/hypervisor/type", "%3s",
59 			hypervisor_type);
60 		return strncmp("xen", hypervisor_type,
61 			sizeof(hypervisor_type)) == 0;
62 	}
63 
64 	return 0;
65 }
66 
tst_is_virt(int virt_type)67 int tst_is_virt(int virt_type)
68 {
69 	switch (virt_type) {
70 	case VIRT_XEN:
71 		return is_xen();
72 	case VIRT_KVM:
73 		return is_kvm();
74 	}
75 	tst_brkm(TBROK, NULL, "invalid virt_type flag: %d", virt_type);
76 }
77