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cpuid.h
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1 #ifndef ARCH_X86_KVM_CPUID_H
2 #define ARCH_X86_KVM_CPUID_H
3 
4 #include "x86.h"
5 
6 void kvm_update_cpuid(struct kvm_vcpu *vcpu);
7 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
8  u32 function, u32 index);
9 int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
10  struct kvm_cpuid_entry2 __user *entries);
11 int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
12  struct kvm_cpuid *cpuid,
13  struct kvm_cpuid_entry __user *entries);
14 int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
15  struct kvm_cpuid2 *cpuid,
16  struct kvm_cpuid_entry2 __user *entries);
17 int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
18  struct kvm_cpuid2 *cpuid,
19  struct kvm_cpuid_entry2 __user *entries);
20 void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);
21 
22 
23 static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
24 {
25  struct kvm_cpuid_entry2 *best;
26 
27  if (!static_cpu_has(X86_FEATURE_XSAVE))
28  return 0;
29 
30  best = kvm_find_cpuid_entry(vcpu, 1, 0);
31  return best && (best->ecx & bit(X86_FEATURE_XSAVE));
32 }
33 
34 static inline bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
35 {
36  struct kvm_cpuid_entry2 *best;
37 
38  best = kvm_find_cpuid_entry(vcpu, 7, 0);
39  return best && (best->ebx & bit(X86_FEATURE_SMEP));
40 }
41 
42 static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
43 {
44  struct kvm_cpuid_entry2 *best;
45 
46  best = kvm_find_cpuid_entry(vcpu, 7, 0);
47  return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
48 }
49 
50 static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
51 {
52  struct kvm_cpuid_entry2 *best;
53 
54  best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
55  return best && (best->ecx & bit(X86_FEATURE_OSVW));
56 }
57 
58 static inline bool guest_cpuid_has_pcid(struct kvm_vcpu *vcpu)
59 {
60  struct kvm_cpuid_entry2 *best;
61 
62  best = kvm_find_cpuid_entry(vcpu, 1, 0);
63  return best && (best->ecx & bit(X86_FEATURE_PCID));
64 }
65 
66 #endif
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