1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __KVM_X86_VMX_HYPERV_H
3#define __KVM_X86_VMX_HYPERV_H
4
5#include <linux/kvm_host.h>
6#include "vmcs12.h"
7#include "vmx.h"
8
9#define EVMPTR_INVALID (-1ULL)
10#define EVMPTR_MAP_PENDING (-2ULL)
11
12enum nested_evmptrld_status {
13	EVMPTRLD_DISABLED,
14	EVMPTRLD_SUCCEEDED,
15	EVMPTRLD_VMFAIL,
16	EVMPTRLD_ERROR,
17};
18
19#ifdef CONFIG_KVM_HYPERV
20static inline bool evmptr_is_valid(u64 evmptr)
21{
22	return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
23}
24
25static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
26{
27	return evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
28}
29
30static inline bool evmptr_is_set(u64 evmptr)
31{
32	return evmptr != EVMPTR_INVALID;
33}
34
35static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
36{
37	return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);
38}
39
40static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
41{
42	return vmx->nested.hv_evmcs;
43}
44
45static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
46{
47	/*
48	 * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
49	 * eVMCS has been explicitly enabled by userspace.
50	 */
51	return vcpu->arch.hyperv_enabled &&
52	       to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
53}
54
55u64 nested_get_evmptr(struct kvm_vcpu *vcpu);
56uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
57int nested_enable_evmcs(struct kvm_vcpu *vcpu,
58			uint16_t *vmcs_version);
59void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
60int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
61bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);
62void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
63#else
64static inline bool evmptr_is_valid(u64 evmptr)
65{
66	return false;
67}
68
69static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
70{
71	return false;
72}
73
74static inline bool evmptr_is_set(u64 evmptr)
75{
76	return false;
77}
78
79static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
80{
81	return false;
82}
83
84static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
85{
86	return NULL;
87}
88#endif
89
90#endif /* __KVM_X86_VMX_HYPERV_H */
91