blob: 8095f8611f8ab1d2c51efcb45d0929842065bc47 [file] [log] [blame]
Alok Kataria88b094f2008-10-27 10:41:46 -07001/*
2 * Common hypervisor code
3 *
4 * Copyright (C) 2008, VMware, Inc.
5 * Author : Alok N Kataria <akataria@vmware.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
16 * details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 */
23
H. Peter Anvin3998d092010-05-09 22:46:54 -070024#include <linux/module.h>
Alok Kataria88b094f2008-10-27 10:41:46 -070025#include <asm/processor.h>
Hannes Eder4e42ebd2008-11-21 22:56:17 +010026#include <asm/hypervisor.h>
Alok Kataria88b094f2008-10-27 10:41:46 -070027
H. Peter Anvine08cae42010-05-07 16:57:28 -070028/*
29 * Hypervisor detect order. This is specified explicitly here because
30 * some hypervisors might implement compatibility modes for other
31 * hypervisors and therefore need to be detected in specific sequence.
32 */
33static const __initconst struct hypervisor_x86 * const hypervisors[] =
Alok Kataria88b094f2008-10-27 10:41:46 -070034{
H. Peter Anvine08cae42010-05-07 16:57:28 -070035 &x86_hyper_vmware,
36 &x86_hyper_ms_hyperv,
Stefano Stabellinica65f9f2010-07-29 14:37:48 +010037#ifdef CONFIG_XEN_PVHVM
Sheng Yangbee6ab532010-05-14 12:39:33 +010038 &x86_hyper_xen_hvm,
Jeremy Fitzhardingeb43275d2010-07-26 10:38:45 -070039#endif
H. Peter Anvine08cae42010-05-07 16:57:28 -070040};
Alok Kataria88b094f2008-10-27 10:41:46 -070041
H. Peter Anvine08cae42010-05-07 16:57:28 -070042const struct hypervisor_x86 *x86_hyper;
H. Peter Anvin96f6e772010-05-09 01:10:34 -070043EXPORT_SYMBOL(x86_hyper);
H. Peter Anvine08cae42010-05-07 16:57:28 -070044
45static inline void __init
46detect_hypervisor_vendor(void)
Alok Katariaeca0cd02008-10-31 12:01:58 -070047{
H. Peter Anvine08cae42010-05-07 16:57:28 -070048 const struct hypervisor_x86 *h, * const *p;
49
50 for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
51 h = *p;
52 if (h->detect()) {
53 x86_hyper = h;
54 printk(KERN_INFO "Hypervisor detected: %s\n", h->name);
55 break;
56 }
57 }
Alok Katariaeca0cd02008-10-31 12:01:58 -070058}
59
Alok Kataria88b094f2008-10-27 10:41:46 -070060void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
61{
H. Peter Anvine08cae42010-05-07 16:57:28 -070062 if (x86_hyper && x86_hyper->set_cpu_features)
63 x86_hyper->set_cpu_features(c);
Alok Kataria88b094f2008-10-27 10:41:46 -070064}
Thomas Gleixner2d826402009-08-20 17:06:25 +020065
66void __init init_hypervisor_platform(void)
67{
H. Peter Anvine08cae42010-05-07 16:57:28 -070068
69 detect_hypervisor_vendor();
70
71 if (!x86_hyper)
72 return;
73
Thomas Gleixner2d826402009-08-20 17:06:25 +020074 init_hypervisor(&boot_cpu_data);
H. Peter Anvine08cae42010-05-07 16:57:28 -070075
76 if (x86_hyper->init_platform)
77 x86_hyper->init_platform();
Thomas Gleixner2d826402009-08-20 17:06:25 +020078}