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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_LOONGARCH_KVM_PARA_H
3#define _ASM_LOONGARCH_KVM_PARA_H
4
5#include <uapi/asm/kvm_para.h>
6
7/*
8 * Hypercall code field
9 */
10#define HYPERVISOR_KVM 1
11#define HYPERVISOR_VENDOR_SHIFT 8
12#define HYPERCALL_ENCODE(vendor, code) ((vendor << HYPERVISOR_VENDOR_SHIFT) + code)
13
14#define KVM_HCALL_CODE_SERVICE 0
15#define KVM_HCALL_CODE_SWDBG 1
16#define KVM_HCALL_CODE_USER_SERVICE 2
17
18#define KVM_HCALL_SERVICE HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE)
19#define KVM_HCALL_FUNC_IPI 1
20#define KVM_HCALL_FUNC_NOTIFY 2
21
22#define KVM_HCALL_SWDBG HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SWDBG)
23
24#define KVM_HCALL_USER_SERVICE HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_USER_SERVICE)
25
26/*
27 * LoongArch hypercall return code
28 */
29#define KVM_HCALL_SUCCESS 0
30#define KVM_HCALL_INVALID_CODE -1UL
31#define KVM_HCALL_INVALID_PARAMETER -2UL
32
33#define KVM_STEAL_PHYS_VALID BIT_ULL(0)
34#define KVM_STEAL_PHYS_MASK GENMASK_ULL(63, 6)
35
36struct kvm_steal_time {
37 __u64 steal;
38 __u32 version;
39 __u32 flags;
40 __u32 pad[12];
41};
42
43/*
44 * Hypercall interface for KVM hypervisor
45 *
46 * a0: function identifier
47 * a1-a5: args
48 * Return value will be placed in a0.
49 * Up to 5 arguments are passed in a1, a2, a3, a4, a5.
50 */
51static __always_inline long kvm_hypercall0(u64 fid)
52{
53 register long ret asm("a0");
54 register unsigned long fun asm("a0") = fid;
55
56 __asm__ __volatile__(
57 "hvcl "__stringify(KVM_HCALL_SERVICE)
58 : "=r" (ret)
59 : "r" (fun)
60 : "memory"
61 );
62
63 return ret;
64}
65
66static __always_inline long kvm_hypercall1(u64 fid, unsigned long arg0)
67{
68 register long ret asm("a0");
69 register unsigned long fun asm("a0") = fid;
70 register unsigned long a1 asm("a1") = arg0;
71
72 __asm__ __volatile__(
73 "hvcl "__stringify(KVM_HCALL_SERVICE)
74 : "=r" (ret)
75 : "r" (fun), "r" (a1)
76 : "memory"
77 );
78
79 return ret;
80}
81
82static __always_inline long kvm_hypercall2(u64 fid,
83 unsigned long arg0, unsigned long arg1)
84{
85 register long ret asm("a0");
86 register unsigned long fun asm("a0") = fid;
87 register unsigned long a1 asm("a1") = arg0;
88 register unsigned long a2 asm("a2") = arg1;
89
90 __asm__ __volatile__(
91 "hvcl "__stringify(KVM_HCALL_SERVICE)
92 : "=r" (ret)
93 : "r" (fun), "r" (a1), "r" (a2)
94 : "memory"
95 );
96
97 return ret;
98}
99
100static __always_inline long kvm_hypercall3(u64 fid,
101 unsigned long arg0, unsigned long arg1, unsigned long arg2)
102{
103 register long ret asm("a0");
104 register unsigned long fun asm("a0") = fid;
105 register unsigned long a1 asm("a1") = arg0;
106 register unsigned long a2 asm("a2") = arg1;
107 register unsigned long a3 asm("a3") = arg2;
108
109 __asm__ __volatile__(
110 "hvcl "__stringify(KVM_HCALL_SERVICE)
111 : "=r" (ret)
112 : "r" (fun), "r" (a1), "r" (a2), "r" (a3)
113 : "memory"
114 );
115
116 return ret;
117}
118
119static __always_inline long kvm_hypercall4(u64 fid,
120 unsigned long arg0, unsigned long arg1,
121 unsigned long arg2, unsigned long arg3)
122{
123 register long ret asm("a0");
124 register unsigned long fun asm("a0") = fid;
125 register unsigned long a1 asm("a1") = arg0;
126 register unsigned long a2 asm("a2") = arg1;
127 register unsigned long a3 asm("a3") = arg2;
128 register unsigned long a4 asm("a4") = arg3;
129
130 __asm__ __volatile__(
131 "hvcl "__stringify(KVM_HCALL_SERVICE)
132 : "=r" (ret)
133 : "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4)
134 : "memory"
135 );
136
137 return ret;
138}
139
140static __always_inline long kvm_hypercall5(u64 fid,
141 unsigned long arg0, unsigned long arg1,
142 unsigned long arg2, unsigned long arg3, unsigned long arg4)
143{
144 register long ret asm("a0");
145 register unsigned long fun asm("a0") = fid;
146 register unsigned long a1 asm("a1") = arg0;
147 register unsigned long a2 asm("a2") = arg1;
148 register unsigned long a3 asm("a3") = arg2;
149 register unsigned long a4 asm("a4") = arg3;
150 register unsigned long a5 asm("a5") = arg4;
151
152 __asm__ __volatile__(
153 "hvcl "__stringify(KVM_HCALL_SERVICE)
154 : "=r" (ret)
155 : "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4), "r" (a5)
156 : "memory"
157 );
158
159 return ret;
160}
161
162#ifdef CONFIG_PARAVIRT
163bool kvm_para_available(void);
164unsigned int kvm_arch_para_features(void);
165#else
166static inline bool kvm_para_available(void)
167{
168 return false;
169}
170
171static inline unsigned int kvm_arch_para_features(void)
172{
173 return 0;
174}
175#endif
176
177static inline unsigned int kvm_arch_para_hints(void)
178{
179 return 0;
180}
181
182static inline bool kvm_check_and_clear_guest_paused(void)
183{
184 return false;
185}
186
187#endif /* _ASM_LOONGARCH_KVM_PARA_H */