b4f69df0f6
Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be desirable to not compile it in to reduce module sizes as well as the attack surface. Introduce CONFIG_KVM_HYPERV option to make it possible. Note, there's room for further nVMX/nSVM code optimizations when !CONFIG_KVM_HYPERV, this will be done in follow-up patches. Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files are grouped together. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Tested-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com> Link: https://lore.kernel.org/r/20231205103630.1391318-13-vkuznets@redhat.com Signed-off-by: Sean Christopherson <seanjc@google.com>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Common Hyper-V on KVM and KVM on Hyper-V definitions (SVM).
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*/
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#ifndef __ARCH_X86_KVM_SVM_HYPERV_H__
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#define __ARCH_X86_KVM_SVM_HYPERV_H__
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#include <asm/mshyperv.h>
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#include "../hyperv.h"
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#include "svm.h"
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#ifdef CONFIG_KVM_HYPERV
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static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
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{
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struct vcpu_svm *svm = to_svm(vcpu);
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struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
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struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
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if (!hv_vcpu)
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return;
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hv_vcpu->nested.pa_page_gpa = hve->partition_assist_page;
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hv_vcpu->nested.vm_id = hve->hv_vm_id;
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hv_vcpu->nested.vp_id = hve->hv_vp_id;
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}
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static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
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{
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struct vcpu_svm *svm = to_svm(vcpu);
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struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
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struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
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if (!hv_vcpu)
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return false;
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if (!hve->hv_enlightenments_control.nested_flush_hypercall)
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return false;
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return hv_vcpu->vp_assist_page.nested_control.features.directhypercall;
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}
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void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
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#else /* CONFIG_KVM_HYPERV */
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static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu) {}
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static inline bool nested_svm_l2_tlb_flush_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_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) {}
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#endif /* CONFIG_KVM_HYPERV */
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#endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */
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