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Linux kernel mirror (for testing)
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1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2008
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 */
19
20#ifndef __POWERPC_KVM_PARA_H__
21#define __POWERPC_KVM_PARA_H__
22
23#include <linux/types.h>
24
25struct kvm_vcpu_arch_shared {
26 __u64 scratch1;
27 __u64 scratch2;
28 __u64 scratch3;
29 __u64 critical; /* Guest may not get interrupts if == r1 */
30 __u64 sprg0;
31 __u64 sprg1;
32 __u64 sprg2;
33 __u64 sprg3;
34 __u64 srr0;
35 __u64 srr1;
36 __u64 dar;
37 __u64 msr;
38 __u32 dsisr;
39 __u32 int_pending; /* Tells the guest if we have an interrupt */
40 __u32 sr[16];
41};
42
43#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
44#define HC_VENDOR_KVM (42 << 16)
45#define HC_EV_SUCCESS 0
46#define HC_EV_UNIMPLEMENTED 12
47
48#define KVM_FEATURE_MAGIC_PAGE 1
49
50#define KVM_MAGIC_FEAT_SR (1 << 0)
51
52#ifdef __KERNEL__
53
54#ifdef CONFIG_KVM_GUEST
55
56#include <linux/of.h>
57
58static inline int kvm_para_available(void)
59{
60 struct device_node *hyper_node;
61
62 hyper_node = of_find_node_by_path("/hypervisor");
63 if (!hyper_node)
64 return 0;
65
66 if (!of_device_is_compatible(hyper_node, "linux,kvm"))
67 return 0;
68
69 return 1;
70}
71
72extern unsigned long kvm_hypercall(unsigned long *in,
73 unsigned long *out,
74 unsigned long nr);
75
76#else
77
78static inline int kvm_para_available(void)
79{
80 return 0;
81}
82
83static unsigned long kvm_hypercall(unsigned long *in,
84 unsigned long *out,
85 unsigned long nr)
86{
87 return HC_EV_UNIMPLEMENTED;
88}
89
90#endif
91
92static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2)
93{
94 unsigned long in[8];
95 unsigned long out[8];
96 unsigned long r;
97
98 r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
99 *r2 = out[0];
100
101 return r;
102}
103
104static inline long kvm_hypercall0(unsigned int nr)
105{
106 unsigned long in[8];
107 unsigned long out[8];
108
109 return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
110}
111
112static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
113{
114 unsigned long in[8];
115 unsigned long out[8];
116
117 in[0] = p1;
118 return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
119}
120
121static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
122 unsigned long p2)
123{
124 unsigned long in[8];
125 unsigned long out[8];
126
127 in[0] = p1;
128 in[1] = p2;
129 return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
130}
131
132static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
133 unsigned long p2, unsigned long p3)
134{
135 unsigned long in[8];
136 unsigned long out[8];
137
138 in[0] = p1;
139 in[1] = p2;
140 in[2] = p3;
141 return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
142}
143
144static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
145 unsigned long p2, unsigned long p3,
146 unsigned long p4)
147{
148 unsigned long in[8];
149 unsigned long out[8];
150
151 in[0] = p1;
152 in[1] = p2;
153 in[2] = p3;
154 in[3] = p4;
155 return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
156}
157
158
159static inline unsigned int kvm_arch_para_features(void)
160{
161 unsigned long r;
162
163 if (!kvm_para_available())
164 return 0;
165
166 if(kvm_hypercall0_1(KVM_HC_FEATURES, &r))
167 return 0;
168
169 return r;
170}
171
172#endif /* __KERNEL__ */
173
174#endif /* __POWERPC_KVM_PARA_H__ */