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 24#include <linux/module.h> 25#include <asm/processor.h> 26#include <asm/hypervisor.h> 27 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 */ 33static const __initconst struct hypervisor_x86 * const hypervisors[] = 34{ 35 &x86_hyper_vmware, 36 &x86_hyper_ms_hyperv, 37#ifdef CONFIG_XEN_PVHVM 38 &x86_hyper_xen_hvm, 39#endif 40}; 41 42const struct hypervisor_x86 *x86_hyper; 43EXPORT_SYMBOL(x86_hyper); 44 45static inline void __init 46detect_hypervisor_vendor(void) 47{ 48 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 } 58} 59 60void __cpuinit init_hypervisor(struct cpuinfo_x86 *c) 61{ 62 if (x86_hyper && x86_hyper->set_cpu_features) 63 x86_hyper->set_cpu_features(c); 64} 65 66void __init init_hypervisor_platform(void) 67{ 68 69 detect_hypervisor_vendor(); 70 71 if (!x86_hyper) 72 return; 73 74 init_hypervisor(&boot_cpu_data); 75 76 if (x86_hyper->init_platform) 77 x86_hyper->init_platform(); 78} 79