Commit | Line | Data |
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88b094fb AK |
1 | /* |
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 | ||
3998d095 | 24 | #include <linux/module.h> |
88b094fb | 25 | #include <asm/processor.h> |
4e42ebd5 | 26 | #include <asm/hypervisor.h> |
88b094fb | 27 | |
e08cae41 PA |
28 | /* |
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 | */ | |
33 | static const __initconst struct hypervisor_x86 * const hypervisors[] = | |
88b094fb | 34 | { |
ca65f9fc | 35 | #ifdef CONFIG_XEN_PVHVM |
bee6ab53 | 36 | &x86_hyper_xen_hvm, |
b43275d6 | 37 | #endif |
24a42bae AC |
38 | &x86_hyper_vmware, |
39 | &x86_hyper_ms_hyperv, | |
d63d3e62 | 40 | #ifdef CONFIG_KVM_GUEST |
fc73373b | 41 | &x86_hyper_kvm, |
d63d3e62 | 42 | #endif |
e08cae41 | 43 | }; |
88b094fb | 44 | |
e08cae41 | 45 | const struct hypervisor_x86 *x86_hyper; |
96f6e775 | 46 | EXPORT_SYMBOL(x86_hyper); |
e08cae41 PA |
47 | |
48 | static inline void __init | |
49 | detect_hypervisor_vendor(void) | |
eca0cd02 | 50 | { |
e08cae41 PA |
51 | 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 | } | |
eca0cd02 AK |
61 | } |
62 | ||
148f9bb8 | 63 | void init_hypervisor(struct cpuinfo_x86 *c) |
88b094fb | 64 | { |
e08cae41 PA |
65 | if (x86_hyper && x86_hyper->set_cpu_features) |
66 | x86_hyper->set_cpu_features(c); | |
88b094fb | 67 | } |
2d826404 TG |
68 | |
69 | void __init init_hypervisor_platform(void) | |
70 | { | |
e08cae41 PA |
71 | |
72 | detect_hypervisor_vendor(); | |
73 | ||
74 | if (!x86_hyper) | |
75 | return; | |
76 | ||
2d826404 | 77 | init_hypervisor(&boot_cpu_data); |
e08cae41 PA |
78 | |
79 | if (x86_hyper->init_platform) | |
80 | x86_hyper->init_platform(); | |
2d826404 | 81 | } |
4cca6ea0 AK |
82 | |
83 | bool __init hypervisor_x2apic_available(void) | |
84 | { | |
85 | return x86_hyper && | |
86 | x86_hyper->x2apic_available && | |
87 | x86_hyper->x2apic_available(); | |
88 | } |