projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 186f4360 PG |
24 | #include <linux/init.h> |
| 25 | #include <linux/export.h> | |
| 88b094fb | 26 | #include <asm/processor.h> |
| 4e42ebd5 | 27 | #include <asm/hypervisor.h> |
| 88b094fb | 28 | |
| e08cae41 | 29 | static const __initconst struct hypervisor_x86 * const hypervisors[] = |
| 88b094fb | 30 | { |
| a71dbdaa BO |
31 | #ifdef CONFIG_XEN |
| 32 | &x86_hyper_xen, | |
| b43275d6 | 33 | #endif |
| 24a42bae AC |
34 | &x86_hyper_vmware, |
| 35 | &x86_hyper_ms_hyperv, | |
| d63d3e62 | 36 | #ifdef CONFIG_KVM_GUEST |
| fc73373b | 37 | &x86_hyper_kvm, |
| d63d3e62 | 38 | #endif |
| e08cae41 | 39 | }; |
| 88b094fb | 40 | |
| e08cae41 | 41 | const struct hypervisor_x86 *x86_hyper; |
| 96f6e775 | 42 | EXPORT_SYMBOL(x86_hyper); |
| e08cae41 PA |
43 | |
| 44 | static inline void __init | |
| 45 | detect_hypervisor_vendor(void) | |
| eca0cd02 | 46 | { |
| e08cae41 | 47 | const struct hypervisor_x86 *h, * const *p; |
| 9df56f19 | 48 | uint32_t pri, max_pri = 0; |
| e08cae41 PA |
49 | |
| 50 | for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) { | |
| 51 | h = *p; | |
| 9df56f19 JW |
52 | pri = h->detect(); |
| 53 | if (pri != 0 && pri > max_pri) { | |
| 54 | max_pri = pri; | |
| e08cae41 | 55 | x86_hyper = h; |
| e08cae41 PA |
56 | } |
| 57 | } | |
| 9df56f19 JW |
58 | |
| 59 | if (max_pri) | |
| 1b74dde7 | 60 | pr_info("Hypervisor detected: %s\n", x86_hyper->name); |
| 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 | } |