summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/kvm_para.h
blob: 5ceb4efca65f91f13846c4b67bc229c79520225d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * 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.  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, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright IBM Corp. 2008
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 */
#ifndef __POWERPC_KVM_PARA_H__
#define __POWERPC_KVM_PARA_H__

#include <uapi/asm/kvm_para.h>

#ifdef CONFIG_KVM_GUEST

#include <linux/of.h>

static inline int kvm_para_available(void)
{
	struct device_node *hyper_node;

	hyper_node = of_find_node_by_path("/hypervisor");
	if (!hyper_node)
		return 0;

	if (!of_device_is_compatible(hyper_node, "linux,kvm"))
		return 0;

	return 1;
}

#else

static inline int kvm_para_available(void)
{
	return 0;
}

#endif

static inline unsigned int kvm_arch_para_features(void)
{
	unsigned long r;

	if (!kvm_para_available())
		return 0;

	if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
		return 0;

	return r;
}

static inline unsigned int kvm_arch_para_hints(void)
{
	return 0;
}

static inline bool kvm_check_and_clear_guest_paused(void)
{
	return false;
}

#endif /* __POWERPC_KVM_PARA_H__ */