/* * Common hypervisor code * * Copyright (C) 2008, VMware, Inc. * Author : Alok N Kataria <akataria@vmware.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT.  See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include <linux/init.h>#include <linux/export.h>#include <asm/processor.h>#include <asm/hypervisor.h> static const __initconst struct hypervisor_x86 * const hypervisors[] ={#ifdef CONFIG_XEN_PV	&x86_hyper_xen_pv,#endif#ifdef CONFIG_XEN_PVHVM	&x86_hyper_xen_hvm,#endif	&x86_hyper_vmware,	&x86_hyper_ms_hyperv,#ifdef CONFIG_KVM_GUEST	&x86_hyper_kvm,#endif#ifdef CONFIG_JAILHOUSE_GUEST	&x86_hyper_jailhouse,#endif#ifdef CONFIG_ACRN_GUEST	&x86_hyper_acrn,#endif}; enum x86_hypervisor_type x86_hyper_type;EXPORT_SYMBOL(x86_hyper_type); bool __initdata nopv;static __init int parse_nopv(char *arg){	nopv = true;	return 0;}early_param("nopv", parse_nopv); static inline const struct hypervisor_x86 * __initdetect_hypervisor_vendor(void){	const struct hypervisor_x86 *h = NULL, * const *p;	uint32_t pri, max_pri = 0; 	for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {		if (unlikely(nopv) && !(*p)->ignore_nopv)			continue; 		pri = (*p)->detect();		if (pri > max_pri) {			max_pri = pri;			h = *p;		}	} 	if (h)		pr_info("Hypervisor detected: %s\n", h->name); 	return h;} static void __init copy_array(const void *src, void *target, unsigned int size){	unsigned int i, n = size / sizeof(void *);	const void * const *from = (const void * const *)src;	const void **to = (const void **)target; 	for (i = 0; i < n; i++)		if (from[i])			to[i] = from[i];} void __init init_hypervisor_platform(void){	const struct hypervisor_x86 *h; 	h = detect_hypervisor_vendor(); 	if (!h)		return; 	copy_array(&h->init, &x86_init.hyper, sizeof(h->init));	copy_array(&h->runtime, &x86_platform.hyper, sizeof(h->runtime)); 	x86_hyper_type = h->type;	x86_init.hyper.init_platform();}