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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/x86/kvm/vmx/hyperv.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef __KVM_X86_VMX_HYPERV_H

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#define __KVM_X86_VMX_HYPERV_H

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#include <linux/kvm_host.h>

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#include "vmcs12.h"

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#include "vmx.h"

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#define EVMPTR_INVALID (-1ULL)

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#define EVMPTR_MAP_PENDING (-2ULL)

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enum nested_evmptrld_status {

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	EVMPTRLD_DISABLED,

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	EVMPTRLD_SUCCEEDED,

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	EVMPTRLD_VMFAIL,

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	EVMPTRLD_ERROR,

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};

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#ifdef CONFIG_KVM_HYPERV

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static inline bool evmptr_is_valid(u64 evmptr)

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{

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	return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;

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}

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static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)

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{

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	return evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);

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}

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static inline bool evmptr_is_set(u64 evmptr)

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{

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	return evmptr != EVMPTR_INVALID;

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}

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static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)

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{

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	return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);

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}

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static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)

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{

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	return vmx->nested.hv_evmcs;

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}

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static inline bool guest_cpu_cap_has_evmcs(struct kvm_vcpu *vcpu)

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{

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	/*

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	 * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and

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	 * eVMCS has been explicitly enabled by userspace.

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	 */

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	return vcpu->arch.hyperv_enabled &&

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	       to_vmx(vcpu)->nested.enlightened_vmcs_enabled;

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}

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u64 nested_get_evmptr(struct kvm_vcpu *vcpu);

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uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);

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int nested_enable_evmcs(struct kvm_vcpu *vcpu,

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			uint16_t *vmcs_version);

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void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);

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int nested_evmcs_check_controls(struct vmcs12 *vmcs12);

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bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);

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void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);

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#else

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static inline bool evmptr_is_valid(u64 evmptr)

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{

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	return false;

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}

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static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)

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{

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	return false;

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}

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static inline bool evmptr_is_set(u64 evmptr)

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{

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	return false;

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}

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static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)

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{

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	return false;

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}

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static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)

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{

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	return NULL;

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}

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#endif

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#endif /* __KVM_X86_VMX_HYPERV_H */

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