linux/arch/x86/kernel/cpu/hypervisor.c

/*
 * 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 <asm/processor.h>
#include <asm/vmware.h>
#include <asm/hypervisor.h>

static inline void __cpuinit
detect_hypervisor_vendor(struct cpuinfo_x86 *c)
{
	if (vmware_platform()) {
		c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE;
	} else {
		c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE;
	}
}

unsigned long get_hypervisor_tsc_freq(void)
{
	if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE)
		return vmware_get_tsc_khz();
	return 0;
}

static inline void __cpuinit
hypervisor_set_feature_bits(struct cpuinfo_x86 *c)
{
	if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE) {
		vmware_set_feature_bits(c);
		return;
	}
}

void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
{
	detect_hypervisor_vendor(c);
	hypervisor_set_feature_bits(c);
}