x86/efi: Enforce CONFIG_RELOCATABLE for EFI boot stub
[linux/fpc-iii.git] / arch / x86 / include / asm / kvm_para.h
blobc7678e43465bd64a3750bb912b9abc7984ac54cd
1 #ifndef _ASM_X86_KVM_PARA_H
2 #define _ASM_X86_KVM_PARA_H
4 #include <asm/processor.h>
5 #include <uapi/asm/kvm_para.h>
7 extern void kvmclock_init(void);
8 extern int kvm_register_clock(char *txt);
10 #ifdef CONFIG_KVM_GUEST
11 bool kvm_check_and_clear_guest_paused(void);
12 #else
13 static inline bool kvm_check_and_clear_guest_paused(void)
15 return false;
17 #endif /* CONFIG_KVM_GUEST */
19 /* This instruction is vmcall. On non-VT architectures, it will generate a
20 * trap that we will then rewrite to the appropriate instruction.
22 #define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1"
24 /* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall
25 * instruction. The hypervisor may replace it with something else but only the
26 * instructions are guaranteed to be supported.
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
30 * placed in rax. No other registers will be clobbered unless explicitly
31 * noted by the particular hypercall.
34 static inline long kvm_hypercall0(unsigned int nr)
36 long ret;
37 asm volatile(KVM_HYPERCALL
38 : "=a"(ret)
39 : "a"(nr)
40 : "memory");
41 return ret;
44 static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
46 long ret;
47 asm volatile(KVM_HYPERCALL
48 : "=a"(ret)
49 : "a"(nr), "b"(p1)
50 : "memory");
51 return ret;
54 static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
55 unsigned long p2)
57 long ret;
58 asm volatile(KVM_HYPERCALL
59 : "=a"(ret)
60 : "a"(nr), "b"(p1), "c"(p2)
61 : "memory");
62 return ret;
65 static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
66 unsigned long p2, unsigned long p3)
68 long ret;
69 asm volatile(KVM_HYPERCALL
70 : "=a"(ret)
71 : "a"(nr), "b"(p1), "c"(p2), "d"(p3)
72 : "memory");
73 return ret;
76 static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
77 unsigned long p2, unsigned long p3,
78 unsigned long p4)
80 long ret;
81 asm volatile(KVM_HYPERCALL
82 : "=a"(ret)
83 : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4)
84 : "memory");
85 return ret;
88 #ifdef CONFIG_KVM_GUEST
89 bool kvm_para_available(void);
90 unsigned int kvm_arch_para_features(void);
91 void __init kvm_guest_init(void);
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);
95 extern void kvm_disable_steal_time(void);
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)
103 #endif /* CONFIG_PARAVIRT_SPINLOCKS */
105 #else /* CONFIG_KVM_GUEST */
106 #define kvm_guest_init() do {} while (0)
107 #define kvm_async_pf_task_wait(T) do {} while(0)
108 #define kvm_async_pf_task_wake(T) do {} while(0)
110 static inline bool kvm_para_available(void)
112 return 0;
115 static inline unsigned int kvm_arch_para_features(void)
117 return 0;
120 static inline u32 kvm_read_and_reset_pf_reason(void)
122 return 0;
125 static inline void kvm_disable_steal_time(void)
127 return;
129 #endif
131 #endif /* _ASM_X86_KVM_PARA_H */