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b0c632db | 1 | /* |
a53c8fab | 2 | * definition for paravirtual devices on s390 |
b0c632db HC |
3 | * |
4 | * Copyright IBM Corp. 2008 | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Christian Borntraeger <borntraeger@de.ibm.com> | |
11 | */ | |
b0c632db | 12 | /* |
e976a2b9 CB |
13 | * Hypercalls for KVM on s390. The calling convention is similar to the |
14 | * s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1 | |
15 | * as hypercall number and R7 as parameter 6. The return value is | |
16 | * written to R2. We use the diagnose instruction as hypercall. To avoid | |
17 | * conflicts with existing diagnoses for LPAR and z/VM, we do not use | |
18 | * the instruction encoded number, but specify the number in R1 and | |
19 | * use 0x500 as KVM hypercall | |
20 | * | |
21 | * Copyright IBM Corp. 2007,2008 | |
22 | * Author(s): Christian Borntraeger <borntraeger@de.ibm.com> | |
23 | * | |
24 | * This work is licensed under the terms of the GNU GPL, version 2. | |
b0c632db | 25 | */ |
9807f759 DH |
26 | #ifndef __S390_KVM_PARA_H |
27 | #define __S390_KVM_PARA_H | |
28 | ||
29 | #include <uapi/asm/kvm_para.h> | |
1ec2772e | 30 | #include <asm/diag.h> |
9807f759 | 31 | |
1ec2772e | 32 | static inline long __kvm_hypercall0(unsigned long nr) |
e976a2b9 CB |
33 | { |
34 | register unsigned long __nr asm("1") = nr; | |
35 | register long __rc asm("2"); | |
36 | ||
37 | asm volatile ("diag 2,4,0x500\n" | |
38 | : "=d" (__rc) : "d" (__nr): "memory", "cc"); | |
39 | return __rc; | |
40 | } | |
41 | ||
1ec2772e MS |
42 | static inline long kvm_hypercall0(unsigned long nr) |
43 | { | |
44 | diag_stat_inc(DIAG_STAT_X500); | |
45 | return __kvm_hypercall0(nr); | |
46 | } | |
47 | ||
48 | static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1) | |
e976a2b9 CB |
49 | { |
50 | register unsigned long __nr asm("1") = nr; | |
51 | register unsigned long __p1 asm("2") = p1; | |
52 | register long __rc asm("2"); | |
53 | ||
54 | asm volatile ("diag 2,4,0x500\n" | |
55 | : "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc"); | |
56 | return __rc; | |
57 | } | |
58 | ||
1ec2772e MS |
59 | static inline long kvm_hypercall1(unsigned long nr, unsigned long p1) |
60 | { | |
61 | diag_stat_inc(DIAG_STAT_X500); | |
62 | return __kvm_hypercall1(nr, p1); | |
63 | } | |
64 | ||
65 | static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1, | |
e976a2b9 CB |
66 | unsigned long p2) |
67 | { | |
68 | register unsigned long __nr asm("1") = nr; | |
69 | register unsigned long __p1 asm("2") = p1; | |
70 | register unsigned long __p2 asm("3") = p2; | |
71 | register long __rc asm("2"); | |
72 | ||
73 | asm volatile ("diag 2,4,0x500\n" | |
74 | : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2) | |
75 | : "memory", "cc"); | |
76 | return __rc; | |
77 | } | |
78 | ||
1ec2772e MS |
79 | static inline long kvm_hypercall2(unsigned long nr, unsigned long p1, |
80 | unsigned long p2) | |
81 | { | |
82 | diag_stat_inc(DIAG_STAT_X500); | |
83 | return __kvm_hypercall2(nr, p1, p2); | |
84 | } | |
85 | ||
86 | static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1, | |
e976a2b9 CB |
87 | unsigned long p2, unsigned long p3) |
88 | { | |
89 | register unsigned long __nr asm("1") = nr; | |
90 | register unsigned long __p1 asm("2") = p1; | |
91 | register unsigned long __p2 asm("3") = p2; | |
92 | register unsigned long __p3 asm("4") = p3; | |
93 | register long __rc asm("2"); | |
94 | ||
95 | asm volatile ("diag 2,4,0x500\n" | |
96 | : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), | |
97 | "d" (__p3) : "memory", "cc"); | |
98 | return __rc; | |
99 | } | |
100 | ||
1ec2772e MS |
101 | static inline long kvm_hypercall3(unsigned long nr, unsigned long p1, |
102 | unsigned long p2, unsigned long p3) | |
103 | { | |
104 | diag_stat_inc(DIAG_STAT_X500); | |
105 | return __kvm_hypercall3(nr, p1, p2, p3); | |
106 | } | |
e976a2b9 | 107 | |
1ec2772e | 108 | static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1, |
e976a2b9 CB |
109 | unsigned long p2, unsigned long p3, |
110 | unsigned long p4) | |
111 | { | |
112 | register unsigned long __nr asm("1") = nr; | |
113 | register unsigned long __p1 asm("2") = p1; | |
114 | register unsigned long __p2 asm("3") = p2; | |
115 | register unsigned long __p3 asm("4") = p3; | |
116 | register unsigned long __p4 asm("5") = p4; | |
117 | register long __rc asm("2"); | |
118 | ||
119 | asm volatile ("diag 2,4,0x500\n" | |
120 | : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), | |
121 | "d" (__p3), "d" (__p4) : "memory", "cc"); | |
122 | return __rc; | |
123 | } | |
124 | ||
1ec2772e MS |
125 | static inline long kvm_hypercall4(unsigned long nr, unsigned long p1, |
126 | unsigned long p2, unsigned long p3, | |
127 | unsigned long p4) | |
128 | { | |
129 | diag_stat_inc(DIAG_STAT_X500); | |
130 | return __kvm_hypercall4(nr, p1, p2, p3, p4); | |
131 | } | |
132 | ||
133 | static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1, | |
e976a2b9 CB |
134 | unsigned long p2, unsigned long p3, |
135 | unsigned long p4, unsigned long p5) | |
136 | { | |
137 | register unsigned long __nr asm("1") = nr; | |
138 | register unsigned long __p1 asm("2") = p1; | |
139 | register unsigned long __p2 asm("3") = p2; | |
140 | register unsigned long __p3 asm("4") = p3; | |
141 | register unsigned long __p4 asm("5") = p4; | |
142 | register unsigned long __p5 asm("6") = p5; | |
143 | register long __rc asm("2"); | |
144 | ||
145 | asm volatile ("diag 2,4,0x500\n" | |
146 | : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), | |
147 | "d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc"); | |
148 | return __rc; | |
149 | } | |
150 | ||
1ec2772e MS |
151 | static inline long kvm_hypercall5(unsigned long nr, unsigned long p1, |
152 | unsigned long p2, unsigned long p3, | |
153 | unsigned long p4, unsigned long p5) | |
154 | { | |
155 | diag_stat_inc(DIAG_STAT_X500); | |
156 | return __kvm_hypercall5(nr, p1, p2, p3, p4, p5); | |
157 | } | |
158 | ||
159 | static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1, | |
e976a2b9 CB |
160 | unsigned long p2, unsigned long p3, |
161 | unsigned long p4, unsigned long p5, | |
162 | unsigned long p6) | |
163 | { | |
164 | register unsigned long __nr asm("1") = nr; | |
165 | register unsigned long __p1 asm("2") = p1; | |
166 | register unsigned long __p2 asm("3") = p2; | |
167 | register unsigned long __p3 asm("4") = p3; | |
168 | register unsigned long __p4 asm("5") = p4; | |
169 | register unsigned long __p5 asm("6") = p5; | |
170 | register unsigned long __p6 asm("7") = p6; | |
171 | register long __rc asm("2"); | |
172 | ||
173 | asm volatile ("diag 2,4,0x500\n" | |
174 | : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2), | |
175 | "d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6) | |
176 | : "memory", "cc"); | |
177 | return __rc; | |
178 | } | |
179 | ||
1ec2772e MS |
180 | static inline long kvm_hypercall6(unsigned long nr, unsigned long p1, |
181 | unsigned long p2, unsigned long p3, | |
182 | unsigned long p4, unsigned long p5, | |
183 | unsigned long p6) | |
184 | { | |
185 | diag_stat_inc(DIAG_STAT_X500); | |
186 | return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6); | |
187 | } | |
188 | ||
e976a2b9 | 189 | /* kvm on s390 is always paravirtualization enabled */ |
b0c632db HC |
190 | static inline int kvm_para_available(void) |
191 | { | |
e976a2b9 | 192 | return 1; |
b0c632db HC |
193 | } |
194 | ||
e976a2b9 | 195 | /* No feature bits are currently assigned for kvm on s390 */ |
b0c632db HC |
196 | static inline unsigned int kvm_arch_para_features(void) |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
3b5d56b9 EM |
201 | static inline bool kvm_check_and_clear_guest_paused(void) |
202 | { | |
203 | return false; | |
204 | } | |
205 | ||
b0c632db | 206 | #endif /* __S390_KVM_PARA_H */ |