blob: 1e7e84a02ebaf4924702019c18cc5d1101609c30 [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{
Stefano Stabellinica65f9f2010-07-29 14:37:48 +010035#ifdef CONFIG_XEN_PVHVM
Sheng Yangbee6ab52010-05-14 12:39:33 +010036 &x86_hyper_xen_hvm,
Jeremy Fitzhardingeb43275d2010-07-26 10:38:45 -070037#endif
Anupam Chanda24a42ba2011-07-08 11:42:50 -070038 &x86_hyper_vmware,
39 &x86_hyper_ms_hyperv,
Avi Kivityd63d3e62012-07-18 11:48:50 +030040#ifdef CONFIG_KVM_GUEST
Prarit Bhargavafc733732012-07-06 13:47:39 -040041 &x86_hyper_kvm,
Avi Kivityd63d3e62012-07-18 11:48:50 +030042#endif
H. Peter Anvine08cae42010-05-07 16:57:28 -070043};
Alok Kataria88b094f2008-10-27 10:41:46 -070044
H. Peter Anvine08cae42010-05-07 16:57:28 -070045const struct hypervisor_x86 *x86_hyper;
H. Peter Anvin96f6e772010-05-09 01:10:34 -070046EXPORT_SYMBOL(x86_hyper);
H. Peter Anvine08cae42010-05-07 16:57:28 -070047
48static inline void __init
49detect_hypervisor_vendor(void)
Alok Katariaeca0cd02008-10-31 12:01:58 -070050{
H. Peter Anvine08cae42010-05-07 16:57:28 -070051 const struct hypervisor_x86 *h, * const *p;
52
53 for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
54 h = *p;
55 if (h->detect()) {
56 x86_hyper = h;
57 printk(KERN_INFO "Hypervisor detected: %s\n", h->name);
58 break;
59 }
60 }
Alok Katariaeca0cd02008-10-31 12:01:58 -070061}
62
Alok Kataria88b094f2008-10-27 10:41:46 -070063void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
64{
H. Peter Anvine08cae42010-05-07 16:57:28 -070065 if (x86_hyper && x86_hyper->set_cpu_features)
66 x86_hyper->set_cpu_features(c);
Alok Kataria88b094f2008-10-27 10:41:46 -070067}
Thomas Gleixner2d826402009-08-20 17:06:25 +020068
69void __init init_hypervisor_platform(void)
70{
H. Peter Anvine08cae42010-05-07 16:57:28 -070071
72 detect_hypervisor_vendor();
73
74 if (!x86_hyper)
75 return;
76
Thomas Gleixner2d826402009-08-20 17:06:25 +020077 init_hypervisor(&boot_cpu_data);
H. Peter Anvine08cae42010-05-07 16:57:28 -070078
79 if (x86_hyper->init_platform)
80 x86_hyper->init_platform();
Thomas Gleixner2d826402009-08-20 17:06:25 +020081}
Alok N Kataria4cca6ea2013-01-17 15:44:42 -080082
83bool __init hypervisor_x2apic_available(void)
84{
85 return x86_hyper &&
86 x86_hyper->x2apic_available &&
87 x86_hyper->x2apic_available();
88}