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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/x86/kernel/cpu/hypervisor.c
ce6fcc30f2ad700907e96a18893c26a72d3f9e74
2 * Common hypervisor code
4 * Copyright (C) 2008, VMware, Inc.
5 * Author : Alok N Kataria <akataria@vmware.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include <linux/init.h>
25 #include <linux/export.h>
26 #include <asm/processor.h>
27 #include <asm/hypervisor.h>
29 static const __initconst
struct hypervisor_x86
* const hypervisors
[] =
34 #ifdef CONFIG_XEN_PVHVM
39 #ifdef CONFIG_KVM_GUEST
44 const struct hypervisor_x86
*x86_hyper
;
45 EXPORT_SYMBOL(x86_hyper
);
47 static inline void __init
48 detect_hypervisor_vendor(void)
50 const struct hypervisor_x86
*h
, * const *p
;
51 uint32_t pri
, max_pri
= 0;
53 for (p
= hypervisors
; p
< hypervisors
+ ARRAY_SIZE(hypervisors
); p
++) {
56 if (pri
!= 0 && pri
> max_pri
) {
63 pr_info("Hypervisor detected: %s\n", x86_hyper
->name
);
66 void init_hypervisor(struct cpuinfo_x86
*c
)
68 if (x86_hyper
&& x86_hyper
->set_cpu_features
)
69 x86_hyper
->set_cpu_features(c
);
72 void __init
init_hypervisor_platform(void)
75 detect_hypervisor_vendor();
80 init_hypervisor(&boot_cpu_data
);
82 if (x86_hyper
->init_platform
)
83 x86_hyper
->init_platform();
86 bool __init
hypervisor_x2apic_available(void)
89 x86_hyper
->x2apic_available
&&
90 x86_hyper
->x2apic_available();
93 void hypervisor_pin_vcpu(int cpu
)
98 if (x86_hyper
->pin_vcpu
)
99 x86_hyper
->pin_vcpu(cpu
);
101 WARN_ONCE(1, "vcpu pinning requested but not supported!\n");