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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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 * KVM L1 hypervisor optimizations on Hyper-V for SVM.
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 */
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#ifndef __ARCH_X86_KVM_SVM_ONHYPERV_H__
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#define __ARCH_X86_KVM_SVM_ONHYPERV_H__
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#include <asm/mshyperv.h>
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#if IS_ENABLED(CONFIG_HYPERV)
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#include "kvm_onhyperv.h"
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#include "svm/hyperv.h"
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__init void svm_hv_hardware_setup(void);
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static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
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{
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	struct hv_vmcb_enlightenments *hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
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	return ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB &&
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	       !!hve->hv_enlightenments_control.enlightened_npt_tlb;
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}
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static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
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{
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	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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	BUILD_BUG_ON(sizeof(vmcb->control.hv_enlightenments) !=
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		     sizeof(vmcb->control.reserved_sw));
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	if (npt_enabled &&
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	    ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB)
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		hve->hv_enlightenments_control.enlightened_npt_tlb = 1;
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	if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP)
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		hve->hv_enlightenments_control.msr_bitmap = 1;
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}
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static inline void svm_hv_vmcb_dirty_nested_enlightenments(
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		struct kvm_vcpu *vcpu)
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{
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	struct vmcb *vmcb = to_svm(vcpu)->vmcb;
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	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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	if (hve->hv_enlightenments_control.msr_bitmap)
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		vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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}
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static inline void svm_hv_update_vp_id(struct vmcb *vmcb, struct kvm_vcpu *vcpu)
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{
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	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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	u32 vp_index = kvm_hv_get_vpindex(vcpu);
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	if (hve->hv_vp_id != vp_index) {
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		hve->hv_vp_id = vp_index;
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		vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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	}
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}
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#else
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static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
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{
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	return false;
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}
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static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
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{
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}
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static inline __init void svm_hv_hardware_setup(void)
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{
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}
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static inline void svm_hv_vmcb_dirty_nested_enlightenments(
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		struct kvm_vcpu *vcpu)
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{
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}
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static inline void svm_hv_update_vp_id(struct vmcb *vmcb,
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		struct kvm_vcpu *vcpu)
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{
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}
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#endif /* CONFIG_HYPERV */
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#endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */
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