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1965aae3 PA |
1 | #ifndef _ASM_X86_KVM_PARA_H |
2 | #define _ASM_X86_KVM_PARA_H | |
5f43238d | 3 | |
5f43238d | 4 | #include <asm/processor.h> |
af170c50 | 5 | #include <uapi/asm/kvm_para.h> |
5f43238d | 6 | |
18068523 | 7 | extern void kvmclock_init(void); |
ca3f1017 | 8 | extern int kvm_register_clock(char *txt); |
18068523 | 9 | |
90993cdd | 10 | #ifdef CONFIG_KVM_GUEST |
3b5d56b9 EM |
11 | bool kvm_check_and_clear_guest_paused(void); |
12 | #else | |
13 | static inline bool kvm_check_and_clear_guest_paused(void) | |
14 | { | |
15 | return false; | |
16 | } | |
90993cdd | 17 | #endif /* CONFIG_KVM_GUEST */ |
18068523 | 18 | |
5f43238d CB |
19 | /* This instruction is vmcall. On non-VT architectures, it will generate a |
20 | * trap that we will then rewrite to the appropriate instruction. | |
21 | */ | |
22 | #define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1" | |
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); |
ba492962 | 91 | void __init kvm_guest_init(void); |
631bc487 GN |
92 | void kvm_async_pf_task_wait(u32 token); |
93 | void kvm_async_pf_task_wake(u32 token); | |
94 | u32 kvm_read_and_reset_pf_reason(void); | |
d910f5c1 | 95 | extern void kvm_disable_steal_time(void); |
92b75202 SV |
96 | |
97 | #ifdef CONFIG_PARAVIRT_SPINLOCKS | |
98 | void __init kvm_spinlock_init(void); | |
99 | #else /* !CONFIG_PARAVIRT_SPINLOCKS */ | |
100 | static inline void kvm_spinlock_init(void) | |
101 | { | |
102 | } | |
103 | #endif /* CONFIG_PARAVIRT_SPINLOCKS */ | |
104 | ||
105 | #else /* CONFIG_KVM_GUEST */ | |
106 | #define kvm_guest_init() do {} while (0) | |
631bc487 GN |
107 | #define kvm_async_pf_task_wait(T) do {} while(0) |
108 | #define kvm_async_pf_task_wake(T) do {} while(0) | |
92b75202 | 109 | |
1c300a40 PB |
110 | static inline bool kvm_para_available(void) |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
77f01bdf PB |
115 | static inline unsigned int kvm_arch_para_features(void) |
116 | { | |
117 | return 0; | |
118 | } | |
119 | ||
d4c90b00 | 120 | static inline u32 kvm_read_and_reset_pf_reason(void) |
631bc487 GN |
121 | { |
122 | return 0; | |
123 | } | |
d910f5c1 GC |
124 | |
125 | static inline void kvm_disable_steal_time(void) | |
126 | { | |
127 | return; | |
128 | } | |
5f43238d CB |
129 | #endif |
130 | ||
1965aae3 | 131 | #endif /* _ASM_X86_KVM_PARA_H */ |