118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
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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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static struct kvm_x86_ops svm_x86_ops;
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int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu);
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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 __init void svm_hv_hardware_setup(void)
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{
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if (npt_enabled &&
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ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) {
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pr_info(KBUILD_MODNAME ": Hyper-V enlightened NPT TLB flush enabled\n");
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svm_x86_ops.tlb_remote_flush = hv_remote_flush_tlb;
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svm_x86_ops.tlb_remote_flush_with_range =
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hv_remote_flush_tlb_with_range;
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}
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if (ms_hyperv.nested_features & HV_X64_NESTED_DIRECT_FLUSH) {
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int cpu;
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pr_info(KBUILD_MODNAME ": Hyper-V Direct TLB Flush enabled\n");
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for_each_online_cpu(cpu) {
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struct hv_vp_assist_page *vp_ap =
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hv_get_vp_assist_page(cpu);
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if (!vp_ap)
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continue;
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vp_ap->nested_control.features.directhypercall = 1;
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}
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svm_x86_ops.enable_l2_tlb_flush =
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svm_hv_enable_l2_tlb_flush;
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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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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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