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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / marvell / linux / arch / s390 / include / asm / kvm_para.h
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b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * definition for paravirtual devices on s390
4 *
5 * Copyright IBM Corp. 2008
6 *
7 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
8 */
9/*
10 * Hypercalls for KVM on s390. The calling convention is similar to the
11 * s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
12 * as hypercall number and R7 as parameter 6. The return value is
13 * written to R2. We use the diagnose instruction as hypercall. To avoid
14 * conflicts with existing diagnoses for LPAR and z/VM, we do not use
15 * the instruction encoded number, but specify the number in R1 and
16 * use 0x500 as KVM hypercall
17 *
18 * Copyright IBM Corp. 2007,2008
19 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
20 */
21#ifndef __S390_KVM_PARA_H
22#define __S390_KVM_PARA_H
23
24#include <uapi/asm/kvm_para.h>
25#include <asm/diag.h>
26
27static inline long __kvm_hypercall0(unsigned long nr)
28{
29 register unsigned long __nr asm("1") = nr;
30 register long __rc asm("2");
31
32 asm volatile ("diag 2,4,0x500\n"
33 : "=d" (__rc) : "d" (__nr): "memory", "cc");
34 return __rc;
35}
36
37static inline long kvm_hypercall0(unsigned long nr)
38{
39 diag_stat_inc(DIAG_STAT_X500);
40 return __kvm_hypercall0(nr);
41}
42
43static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1)
44{
45 register unsigned long __nr asm("1") = nr;
46 register unsigned long __p1 asm("2") = p1;
47 register long __rc asm("2");
48
49 asm volatile ("diag 2,4,0x500\n"
50 : "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
51 return __rc;
52}
53
54static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
55{
56 diag_stat_inc(DIAG_STAT_X500);
57 return __kvm_hypercall1(nr, p1);
58}
59
60static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1,
61 unsigned long p2)
62{
63 register unsigned long __nr asm("1") = nr;
64 register unsigned long __p1 asm("2") = p1;
65 register unsigned long __p2 asm("3") = p2;
66 register long __rc asm("2");
67
68 asm volatile ("diag 2,4,0x500\n"
69 : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
70 : "memory", "cc");
71 return __rc;
72}
73
74static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
75 unsigned long p2)
76{
77 diag_stat_inc(DIAG_STAT_X500);
78 return __kvm_hypercall2(nr, p1, p2);
79}
80
81static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1,
82 unsigned long p2, unsigned long p3)
83{
84 register unsigned long __nr asm("1") = nr;
85 register unsigned long __p1 asm("2") = p1;
86 register unsigned long __p2 asm("3") = p2;
87 register unsigned long __p3 asm("4") = p3;
88 register long __rc asm("2");
89
90 asm volatile ("diag 2,4,0x500\n"
91 : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
92 "d" (__p3) : "memory", "cc");
93 return __rc;
94}
95
96static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
97 unsigned long p2, unsigned long p3)
98{
99 diag_stat_inc(DIAG_STAT_X500);
100 return __kvm_hypercall3(nr, p1, p2, p3);
101}
102
103static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1,
104 unsigned long p2, unsigned long p3,
105 unsigned long p4)
106{
107 register unsigned long __nr asm("1") = nr;
108 register unsigned long __p1 asm("2") = p1;
109 register unsigned long __p2 asm("3") = p2;
110 register unsigned long __p3 asm("4") = p3;
111 register unsigned long __p4 asm("5") = p4;
112 register long __rc asm("2");
113
114 asm volatile ("diag 2,4,0x500\n"
115 : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
116 "d" (__p3), "d" (__p4) : "memory", "cc");
117 return __rc;
118}
119
120static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
121 unsigned long p2, unsigned long p3,
122 unsigned long p4)
123{
124 diag_stat_inc(DIAG_STAT_X500);
125 return __kvm_hypercall4(nr, p1, p2, p3, p4);
126}
127
128static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1,
129 unsigned long p2, unsigned long p3,
130 unsigned long p4, unsigned long p5)
131{
132 register unsigned long __nr asm("1") = nr;
133 register unsigned long __p1 asm("2") = p1;
134 register unsigned long __p2 asm("3") = p2;
135 register unsigned long __p3 asm("4") = p3;
136 register unsigned long __p4 asm("5") = p4;
137 register unsigned long __p5 asm("6") = p5;
138 register long __rc asm("2");
139
140 asm volatile ("diag 2,4,0x500\n"
141 : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
142 "d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc");
143 return __rc;
144}
145
146static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
147 unsigned long p2, unsigned long p3,
148 unsigned long p4, unsigned long p5)
149{
150 diag_stat_inc(DIAG_STAT_X500);
151 return __kvm_hypercall5(nr, p1, p2, p3, p4, p5);
152}
153
154static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1,
155 unsigned long p2, unsigned long p3,
156 unsigned long p4, unsigned long p5,
157 unsigned long p6)
158{
159 register unsigned long __nr asm("1") = nr;
160 register unsigned long __p1 asm("2") = p1;
161 register unsigned long __p2 asm("3") = p2;
162 register unsigned long __p3 asm("4") = p3;
163 register unsigned long __p4 asm("5") = p4;
164 register unsigned long __p5 asm("6") = p5;
165 register unsigned long __p6 asm("7") = p6;
166 register long __rc asm("2");
167
168 asm volatile ("diag 2,4,0x500\n"
169 : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
170 "d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
171 : "memory", "cc");
172 return __rc;
173}
174
175static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
176 unsigned long p2, unsigned long p3,
177 unsigned long p4, unsigned long p5,
178 unsigned long p6)
179{
180 diag_stat_inc(DIAG_STAT_X500);
181 return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6);
182}
183
184/* kvm on s390 is always paravirtualization enabled */
185static inline int kvm_para_available(void)
186{
187 return 1;
188}
189
190/* No feature bits are currently assigned for kvm on s390 */
191static inline unsigned int kvm_arch_para_features(void)
192{
193 return 0;
194}
195
196static inline unsigned int kvm_arch_para_hints(void)
197{
198 return 0;
199}
200
201static inline bool kvm_check_and_clear_guest_paused(void)
202{
203 return false;
204}
205
206#endif /* __S390_KVM_PARA_H */