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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_KVM_PARA_H |
3 | #define _ASM_X86_KVM_PARA_H | |
5f43238d | 4 | |
5f43238d | 5 | #include <asm/processor.h> |
c1118b36 | 6 | #include <asm/alternative.h> |
af170c50 | 7 | #include <uapi/asm/kvm_para.h> |
5f43238d | 8 | |
18068523 | 9 | extern void kvmclock_init(void); |
ca3f1017 | 10 | extern int kvm_register_clock(char *txt); |
18068523 | 11 | |
90993cdd | 12 | #ifdef CONFIG_KVM_GUEST |
3b5d56b9 EM |
13 | bool kvm_check_and_clear_guest_paused(void); |
14 | #else | |
15 | static inline bool kvm_check_and_clear_guest_paused(void) | |
16 | { | |
17 | return false; | |
18 | } | |
90993cdd | 19 | #endif /* CONFIG_KVM_GUEST */ |
18068523 | 20 | |
c1118b36 PB |
21 | #define KVM_HYPERCALL \ |
22 | ALTERNATIVE(".byte 0x0f,0x01,0xc1", ".byte 0x0f,0x01,0xd9", X86_FEATURE_VMMCALL) | |
5f43238d | 23 | |
e423ca15 | 24 | /* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall |
5f43238d CB |
25 | * instruction. The hypervisor may replace it with something else but only the |
26 | * instructions are guaranteed to be supported. | |
27 | * | |
28 | * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively. | |
29 | * The hypercall number should be placed in rax and the return value will be | |
11393a07 | 30 | * placed in rax. No other registers will be clobbered unless explicitly |
5f43238d CB |
31 | * noted by the particular hypercall. |
32 | */ | |
33 | ||
34 | static inline long kvm_hypercall0(unsigned int nr) | |
35 | { | |
36 | long ret; | |
37 | asm volatile(KVM_HYPERCALL | |
38 | : "=a"(ret) | |
ca373932 AL |
39 | : "a"(nr) |
40 | : "memory"); | |
5f43238d CB |
41 | return ret; |
42 | } | |
43 | ||
44 | static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) | |
45 | { | |
46 | long ret; | |
47 | asm volatile(KVM_HYPERCALL | |
48 | : "=a"(ret) | |
ca373932 AL |
49 | : "a"(nr), "b"(p1) |
50 | : "memory"); | |
5f43238d CB |
51 | return ret; |
52 | } | |
53 | ||
54 | static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, | |
55 | unsigned long p2) | |
56 | { | |
57 | long ret; | |
58 | asm volatile(KVM_HYPERCALL | |
59 | : "=a"(ret) | |
ca373932 AL |
60 | : "a"(nr), "b"(p1), "c"(p2) |
61 | : "memory"); | |
5f43238d CB |
62 | return ret; |
63 | } | |
64 | ||
65 | static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, | |
66 | unsigned long p2, unsigned long p3) | |
67 | { | |
68 | long ret; | |
69 | asm volatile(KVM_HYPERCALL | |
70 | : "=a"(ret) | |
ca373932 AL |
71 | : "a"(nr), "b"(p1), "c"(p2), "d"(p3) |
72 | : "memory"); | |
5f43238d CB |
73 | return ret; |
74 | } | |
75 | ||
76 | static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, | |
77 | unsigned long p2, unsigned long p3, | |
78 | unsigned long p4) | |
79 | { | |
80 | long ret; | |
81 | asm volatile(KVM_HYPERCALL | |
82 | : "=a"(ret) | |
ca373932 AL |
83 | : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4) |
84 | : "memory"); | |
5f43238d CB |
85 | return ret; |
86 | } | |
87 | ||
ba492962 | 88 | #ifdef CONFIG_KVM_GUEST |
1c300a40 | 89 | bool kvm_para_available(void); |
77f01bdf | 90 | unsigned int kvm_arch_para_features(void); |
a2b7861b | 91 | void kvm_async_pf_task_wait(u32 token, int interrupt_kernel); |
631bc487 GN |
92 | void kvm_async_pf_task_wake(u32 token); |
93 | u32 kvm_read_and_reset_pf_reason(void); | |
d910f5c1 | 94 | extern void kvm_disable_steal_time(void); |
92b75202 SV |
95 | |
96 | #ifdef CONFIG_PARAVIRT_SPINLOCKS | |
97 | void __init kvm_spinlock_init(void); | |
98 | #else /* !CONFIG_PARAVIRT_SPINLOCKS */ | |
99 | static inline void kvm_spinlock_init(void) | |
100 | { | |
101 | } | |
102 | #endif /* CONFIG_PARAVIRT_SPINLOCKS */ | |
103 | ||
104 | #else /* CONFIG_KVM_GUEST */ | |
a2b7861b | 105 | #define kvm_async_pf_task_wait(T, I) do {} while(0) |
631bc487 | 106 | #define kvm_async_pf_task_wake(T) do {} while(0) |
92b75202 | 107 | |
1c300a40 PB |
108 | static inline bool kvm_para_available(void) |
109 | { | |
1d804d07 | 110 | return false; |
1c300a40 PB |
111 | } |
112 | ||
77f01bdf PB |
113 | static inline unsigned int kvm_arch_para_features(void) |
114 | { | |
115 | return 0; | |
116 | } | |
117 | ||
d4c90b00 | 118 | static inline u32 kvm_read_and_reset_pf_reason(void) |
631bc487 GN |
119 | { |
120 | return 0; | |
121 | } | |
d910f5c1 GC |
122 | |
123 | static inline void kvm_disable_steal_time(void) | |
124 | { | |
125 | return; | |
126 | } | |
5f43238d CB |
127 | #endif |
128 | ||
1965aae3 | 129 | #endif /* _ASM_X86_KVM_PARA_H */ |