1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/* $NetBSD: isqemu.h,v 1.6 2021/12/15 09:19:28 gson Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/drvctlio.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include <unistd.h>
static __inline bool
isQEMU(void) {
struct devlistargs dla = {
.l_devname = "qemufwcfg0",
.l_childname = NULL,
.l_children = 0,
};
int fd = open(DRVCTLDEV, O_RDONLY, 0);
if (fd == -1)
return false;
if (ioctl(fd, DRVLISTDEV, &dla) == -1) {
close(fd);
return false;
}
close(fd);
return true;
}
static __inline bool
isQEMU_TCG(void) {
#if defined(__i386__) || defined(__x86_64__)
char name[1024];
size_t len = sizeof(name);
if (sysctlbyname("machdep.cpu_brand", name, &len, NULL, 0) == -1) {
if (errno == ENOENT)
return false;
err(EXIT_FAILURE, "sysctl");
}
if (strstr(name, "QEMU") == NULL)
return false;
if (sysctlbyname("machdep.hypervisor", name, &len, NULL, 0) == -1) {
if (errno == ENOENT)
return true;
err(EXIT_FAILURE, "sysctl");
}
if (strcmp(name, "KVM") == 0)
return false;
return true;
#endif
return false;
}
#ifdef TEST
int
main(void) {
return isQEMU();
}
#endif
|