Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 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 | |
H. Peter Anvin | 3998d09 | 2010-05-09 22:46:54 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 25 | #include <asm/processor.h> |
Hannes Eder | 4e42ebd | 2008-11-21 22:56:17 +0100 | [diff] [blame] | 26 | #include <asm/hypervisor.h> |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 27 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 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[] = |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 34 | { |
Stefano Stabellini | ca65f9f | 2010-07-29 14:37:48 +0100 | [diff] [blame] | 35 | #ifdef CONFIG_XEN_PVHVM |
Sheng Yang | bee6ab5 | 2010-05-14 12:39:33 +0100 | [diff] [blame] | 36 | &x86_hyper_xen_hvm, |
Jeremy Fitzhardinge | b43275d | 2010-07-26 10:38:45 -0700 | [diff] [blame] | 37 | #endif |
Anupam Chanda | 24a42ba | 2011-07-08 11:42:50 -0700 | [diff] [blame] | 38 | &x86_hyper_vmware, |
| 39 | &x86_hyper_ms_hyperv, |
Avi Kivity | d63d3e6 | 2012-07-18 11:48:50 +0300 | [diff] [blame] | 40 | #ifdef CONFIG_KVM_GUEST |
Prarit Bhargava | fc73373 | 2012-07-06 13:47:39 -0400 | [diff] [blame] | 41 | &x86_hyper_kvm, |
Avi Kivity | d63d3e6 | 2012-07-18 11:48:50 +0300 | [diff] [blame] | 42 | #endif |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 43 | }; |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 44 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 45 | const struct hypervisor_x86 *x86_hyper; |
H. Peter Anvin | 96f6e77 | 2010-05-09 01:10:34 -0700 | [diff] [blame] | 46 | EXPORT_SYMBOL(x86_hyper); |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 47 | |
| 48 | static inline void __init |
| 49 | detect_hypervisor_vendor(void) |
Alok Kataria | eca0cd0 | 2008-10-31 12:01:58 -0700 | [diff] [blame] | 50 | { |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 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 | } |
Alok Kataria | eca0cd0 | 2008-10-31 12:01:58 -0700 | [diff] [blame] | 61 | } |
| 62 | |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 63 | void __cpuinit init_hypervisor(struct cpuinfo_x86 *c) |
| 64 | { |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 65 | if (x86_hyper && x86_hyper->set_cpu_features) |
| 66 | x86_hyper->set_cpu_features(c); |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 67 | } |
Thomas Gleixner | 2d82640 | 2009-08-20 17:06:25 +0200 | [diff] [blame] | 68 | |
| 69 | void __init init_hypervisor_platform(void) |
| 70 | { |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 71 | |
| 72 | detect_hypervisor_vendor(); |
| 73 | |
| 74 | if (!x86_hyper) |
| 75 | return; |
| 76 | |
Thomas Gleixner | 2d82640 | 2009-08-20 17:06:25 +0200 | [diff] [blame] | 77 | init_hypervisor(&boot_cpu_data); |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 78 | |
| 79 | if (x86_hyper->init_platform) |
| 80 | x86_hyper->init_platform(); |
Thomas Gleixner | 2d82640 | 2009-08-20 17:06:25 +0200 | [diff] [blame] | 81 | } |
Alok N Kataria | 4cca6ea | 2013-01-17 15:44:42 -0800 | [diff] [blame] | 82 | |
| 83 | bool __init hypervisor_x2apic_available(void) |
| 84 | { |
| 85 | return x86_hyper && |
| 86 | x86_hyper->x2apic_available && |
| 87 | x86_hyper->x2apic_available(); |
| 88 | } |