https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 6ce4eac1f600b34f2f7f58f9cd8f0503d79e42ae authored by Linus Torvalds on 22 November 2013, 19:30:55 UTC
Linux 3.13-rc1
Linux 3.13-rc1
Tip revision: 6ce4eac
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 <linux/module.h>
#include <asm/processor.h>
#include <asm/hypervisor.h>
static const __initconst struct hypervisor_x86 * const hypervisors[] =
{
#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 __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)
printk(KERN_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();
}