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x86: KVM guest: add basic paravirt support
[linux-2.6] / include / linux / kvm_para.h
1 #ifndef __LINUX_KVM_PARA_H
2 #define __LINUX_KVM_PARA_H
3
4 /*
5  * This header file provides a method for making a hypercall to the host
6  * Architectures should define:
7  * - kvm_hypercall0, kvm_hypercall1...
8  * - kvm_arch_para_features
9  * - kvm_para_available
10  */
11
12 /* Return values for hypercalls */
13 #define KVM_ENOSYS              1000
14
15 #define KVM_HC_VAPIC_POLL_IRQ            1
16
17 /*
18  * hypercalls use architecture specific
19  */
20 #include <asm/kvm_para.h>
21
22 #ifdef __KERNEL__
23 #ifdef CONFIG_KVM_GUEST
24 void __init kvm_guest_init(void);
25 #else
26 #define kvm_guest_init() do { } while (0)
27 #endif
28
29 static inline int kvm_para_has_feature(unsigned int feature)
30 {
31         if (kvm_arch_para_features() & (1UL << feature))
32                 return 1;
33         return 0;
34 }
35 #endif /* __KERNEL__ */
36 #endif /* __LINUX_KVM_PARA_H */
37