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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
90dfdc7c DD |
2 | #ifndef _ASM_MIPS_KVM_PARA_H |
3 | #define _ASM_MIPS_KVM_PARA_H | |
4 | ||
5 | #include <uapi/asm/kvm_para.h> | |
6 | ||
7 | #define KVM_HYPERCALL ".word 0x42000028" | |
8 | ||
9 | /* | |
10 | * Hypercalls for KVM. | |
11 | * | |
12 | * Hypercall number is passed in v0. | |
13 | * Return value will be placed in v0. | |
14 | * Up to 3 arguments are passed in a0, a1, and a2. | |
15 | */ | |
16 | static inline unsigned long kvm_hypercall0(unsigned long num) | |
17 | { | |
18 | register unsigned long n asm("v0"); | |
19 | register unsigned long r asm("v0"); | |
20 | ||
21 | n = num; | |
22 | __asm__ __volatile__( | |
23 | KVM_HYPERCALL | |
24 | : "=r" (r) : "r" (n) : "memory" | |
25 | ); | |
26 | ||
27 | return r; | |
28 | } | |
29 | ||
30 | static inline unsigned long kvm_hypercall1(unsigned long num, | |
31 | unsigned long arg0) | |
32 | { | |
33 | register unsigned long n asm("v0"); | |
34 | register unsigned long r asm("v0"); | |
35 | register unsigned long a0 asm("a0"); | |
36 | ||
37 | n = num; | |
38 | a0 = arg0; | |
39 | __asm__ __volatile__( | |
40 | KVM_HYPERCALL | |
41 | : "=r" (r) : "r" (n), "r" (a0) : "memory" | |
42 | ); | |
43 | ||
44 | return r; | |
45 | } | |
46 | ||
47 | static inline unsigned long kvm_hypercall2(unsigned long num, | |
48 | unsigned long arg0, unsigned long arg1) | |
49 | { | |
50 | register unsigned long n asm("v0"); | |
51 | register unsigned long r asm("v0"); | |
52 | register unsigned long a0 asm("a0"); | |
53 | register unsigned long a1 asm("a1"); | |
54 | ||
55 | n = num; | |
56 | a0 = arg0; | |
57 | a1 = arg1; | |
58 | __asm__ __volatile__( | |
59 | KVM_HYPERCALL | |
60 | : "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory" | |
61 | ); | |
62 | ||
63 | return r; | |
64 | } | |
65 | ||
66 | static inline unsigned long kvm_hypercall3(unsigned long num, | |
67 | unsigned long arg0, unsigned long arg1, unsigned long arg2) | |
68 | { | |
69 | register unsigned long n asm("v0"); | |
70 | register unsigned long r asm("v0"); | |
71 | register unsigned long a0 asm("a0"); | |
72 | register unsigned long a1 asm("a1"); | |
73 | register unsigned long a2 asm("a2"); | |
74 | ||
75 | n = num; | |
76 | a0 = arg0; | |
77 | a1 = arg1; | |
78 | a2 = arg2; | |
79 | __asm__ __volatile__( | |
80 | KVM_HYPERCALL | |
81 | : "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory" | |
82 | ); | |
83 | ||
84 | return r; | |
85 | } | |
86 | ||
87 | static inline bool kvm_check_and_clear_guest_paused(void) | |
88 | { | |
89 | return false; | |
90 | } | |
91 | ||
92 | static inline unsigned int kvm_arch_para_features(void) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
97 | #ifdef CONFIG_MIPS_PARAVIRT | |
98 | static inline bool kvm_para_available(void) | |
99 | { | |
100 | return true; | |
101 | } | |
102 | #else | |
103 | static inline bool kvm_para_available(void) | |
104 | { | |
105 | return false; | |
106 | } | |
107 | #endif | |
108 | ||
109 | ||
110 | #endif /* _ASM_MIPS_KVM_PARA_H */ |