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KVM: x86: Disallow hypercalls for guest callers in rings > 0
[thirdparty/kernel/stable.git] / include / linux / kvm_para.h
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1#ifndef __LINUX_KVM_PARA_H
2#define __LINUX_KVM_PARA_H
3
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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
102d8325 10 */
102d8325 11
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12/* Return values for hypercalls */
13#define KVM_ENOSYS 1000
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14#define KVM_EFAULT EFAULT
15#define KVM_E2BIG E2BIG
3f1538a4 16#define KVM_EPERM EPERM
102d8325 17
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18#define KVM_HC_VAPIC_POLL_IRQ 1
19#define KVM_HC_MMU_OP 2
b93463aa 20
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21/*
22 * hypercalls use architecture specific
c21415e8 23 */
5f43238d 24#include <asm/kvm_para.h>
7aa81cc0 25
a03d7f4b 26#ifdef __KERNEL__
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27#ifdef CONFIG_KVM_GUEST
28void __init kvm_guest_init(void);
29#else
30#define kvm_guest_init() do { } while (0)
31#endif
32
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33static inline int kvm_para_has_feature(unsigned int feature)
34{
5f43238d 35 if (kvm_arch_para_features() & (1UL << feature))
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36 return 1;
37 return 0;
38}
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39#endif /* __KERNEL__ */
40#endif /* __LINUX_KVM_PARA_H */
7aa81cc0 41