88 lines
2.1 KiB
C
88 lines
2.1 KiB
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 <linux/module.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/hypervisor.h>
|
|
|
|
static const __initconst struct hypervisor_x86 * const hypervisors[] =
|
|
{
|
|
#ifdef CONFIG_XEN
|
|
&x86_hyper_xen,
|
|
#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 __init
|
|
detect_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_hypervisor(struct cpuinfo_x86 *c)
|
|
{
|
|
if (x86_hyper && x86_hyper->set_cpu_features)
|
|
x86_hyper->set_cpu_features(c);
|
|
}
|
|
|
|
void __init init_hypervisor_platform(void)
|
|
{
|
|
|
|
detect_hypervisor_vendor();
|
|
|
|
if (!x86_hyper)
|
|
return;
|
|
|
|
init_hypervisor(&boot_cpu_data);
|
|
|
|
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();
|
|
}
|