1. 根目录:
2. arch
3. x86
4. kvm
5. cpuid.h

#ifndef ARCH_X86_KVM_CPUID_H
#define ARCH_X86_KVM_CPUID_H

#include "x86.h"

int kvm_update_cpuid(struct kvm_vcpu *vcpu);
struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
					      u32 function, u32 index);
int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
			    struct kvm_cpuid_entry2 __user *entries,
			    unsigned int type);
int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
			     struct kvm_cpuid *cpuid,
			     struct kvm_cpuid_entry __user *entries);
int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
			      struct kvm_cpuid2 *cpuid,
			      struct kvm_cpuid_entry2 __user *entries);
int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
			      struct kvm_cpuid2 *cpuid,
			      struct kvm_cpuid_entry2 __user *entries);
void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);


static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	if (!static_cpu_has(X86_FEATURE_XSAVE))
		return 0;

	best = kvm_find_cpuid_entry(vcpu, 1, 0);
	return best && (best->ecx & bit(X86_FEATURE_XSAVE));
}

static inline bool guest_cpuid_has_tsc_adjust(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	return best && (best->ebx & bit(X86_FEATURE_TSC_ADJUST));
}

static inline bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	return best && (best->ebx & bit(X86_FEATURE_SMEP));
}

static inline bool guest_cpuid_has_smap(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	return best && (best->ebx & bit(X86_FEATURE_SMAP));
}

static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
}

static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
	return best && (best->ecx & bit(X86_FEATURE_OSVW));
}

static inline bool guest_cpuid_has_pcid(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 1, 0);
	return best && (best->ecx & bit(X86_FEATURE_PCID));
}

static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 1, 0);
	return best && (best->ecx & bit(X86_FEATURE_X2APIC));
}

static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0, 0);
	return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
}

static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
	return best && (best->edx & bit(X86_FEATURE_GBPAGES));
}

static inline bool guest_cpuid_has_rtm(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	return best && (best->ebx & bit(X86_FEATURE_RTM));
}
#endif