1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011 NetApp, Inc.
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * This file and its contents are supplied under the terms of the
30 * Common Development and Distribution License ("CDDL"), version 1.0.
31 * You may only use this file in accordance with the terms of version
32 * 1.0 of the CDDL.
33 *
34 * A full copy of the text of the CDDL should have accompanied this
35 * source. A copy of the CDDL is also available via the Internet at
36 * http://www.illumos.org/license/CDDL.
37 *
38 * Copyright 2013 Pluribus Networks Inc.
39 */
40
41 #include <sys/cdefs.h>
42
43 #include <sys/param.h>
44 #include <sys/libkern.h>
45
46 #include <machine/md_var.h>
47
48 #include "vmm_util.h"
49
50 bool
vmm_is_intel(void)51 vmm_is_intel(void)
52 {
53
54 return (strcmp(cpu_vendor, "GenuineIntel") == 0);
55 }
56
57 bool
vmm_is_svm(void)58 vmm_is_svm(void)
59 {
60 return (strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
61 strcmp(cpu_vendor, "HygonGenuine") == 0);
62 }
63
64 bool
vmm_supports_1G_pages(void)65 vmm_supports_1G_pages(void)
66 {
67 unsigned int regs[4];
68
69 /*
70 * CPUID.80000001:EDX[bit 26] = 1 indicates support for 1GB pages
71 *
72 * Both Intel and AMD support this bit.
73 */
74 if (cpu_exthigh >= 0x80000001) {
75 do_cpuid(0x80000001, regs);
76 if (regs[3] & (1 << 26))
77 return (true);
78 }
79 return (false);
80 }
81