/* * 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}; const struct hypervisor_x86 *x86_hyper;EXPORT_SYMBOL(x86_hyper); static inline void __initdetect_hypervisor_vendor(void){	const struct hypervisor_x86 *h, * const *p;	uint32_t pri, max_pri = 0; 	for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {		h = *p;		pri = h->detect();		if (pri != 0 && pri > max_pri) {			max_pri = pri;			x86_hyper = h;		}	} 	if (max_pri)		pr_info("Hypervisor detected: %s\n", x86_hyper->name);} void __init init_hypervisor_platform(void){ 	detect_hypervisor_vendor(); 	if (!x86_hyper)		return; 	if (x86_hyper->init_platform)		x86_hyper->init_platform();} bool __init hypervisor_x2apic_available(void){	return x86_hyper                   &&	       x86_hyper->x2apic_available &&	       x86_hyper->x2apic_available();} void hypervisor_pin_vcpu(int cpu){	if (!x86_hyper)		return; 	if (x86_hyper->pin_vcpu)		x86_hyper->pin_vcpu(cpu);	else		WARN_ONCE(1, "vcpu pinning requested but not supported!\n");}