1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * KVM L1 hypervisor optimizations on Hyper-V for SVM. 4 */ 5 6 #ifndef __ARCH_X86_KVM_SVM_ONHYPERV_H__ 7 #define __ARCH_X86_KVM_SVM_ONHYPERV_H__ 8 9 #if IS_ENABLED(CONFIG_HYPERV) 10 11 #include "kvm_onhyperv.h" 12 #include "svm/hyperv.h" 13 14 static struct kvm_x86_ops svm_x86_ops; 15 16 int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu); 17 18 static inline void svm_hv_init_vmcb(struct vmcb *vmcb) 19 { 20 struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments; 21 22 BUILD_BUG_ON(sizeof(vmcb->control.hv_enlightenments) != 23 sizeof(vmcb->control.reserved_sw)); 24 25 if (npt_enabled && 26 ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) 27 hve->hv_enlightenments_control.enlightened_npt_tlb = 1; 28 29 if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP) 30 hve->hv_enlightenments_control.msr_bitmap = 1; 31 } 32 33 static inline void svm_hv_hardware_setup(void) 34 { 35 if (npt_enabled && 36 ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) { 37 pr_info("kvm: Hyper-V enlightened NPT TLB flush enabled\n"); 38 svm_x86_ops.tlb_remote_flush = hv_remote_flush_tlb; 39 svm_x86_ops.tlb_remote_flush_with_range = 40 hv_remote_flush_tlb_with_range; 41 } 42 43 if (ms_hyperv.nested_features & HV_X64_NESTED_DIRECT_FLUSH) { 44 int cpu; 45 46 pr_info("kvm: Hyper-V Direct TLB Flush enabled\n"); 47 for_each_online_cpu(cpu) { 48 struct hv_vp_assist_page *vp_ap = 49 hv_get_vp_assist_page(cpu); 50 51 if (!vp_ap) 52 continue; 53 54 vp_ap->nested_control.features.directhypercall = 1; 55 } 56 svm_x86_ops.enable_l2_tlb_flush = 57 svm_hv_enable_l2_tlb_flush; 58 } 59 } 60 61 static inline void svm_hv_vmcb_dirty_nested_enlightenments( 62 struct kvm_vcpu *vcpu) 63 { 64 struct vmcb *vmcb = to_svm(vcpu)->vmcb; 65 struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments; 66 67 if (hve->hv_enlightenments_control.msr_bitmap) 68 vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS); 69 } 70 71 static inline void svm_hv_update_vp_id(struct vmcb *vmcb, struct kvm_vcpu *vcpu) 72 { 73 struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments; 74 u32 vp_index = kvm_hv_get_vpindex(vcpu); 75 76 if (hve->hv_vp_id != vp_index) { 77 hve->hv_vp_id = vp_index; 78 vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS); 79 } 80 } 81 #else 82 83 static inline void svm_hv_init_vmcb(struct vmcb *vmcb) 84 { 85 } 86 87 static inline void svm_hv_hardware_setup(void) 88 { 89 } 90 91 static inline void svm_hv_vmcb_dirty_nested_enlightenments( 92 struct kvm_vcpu *vcpu) 93 { 94 } 95 96 static inline void svm_hv_update_vp_id(struct vmcb *vmcb, 97 struct kvm_vcpu *vcpu) 98 { 99 } 100 #endif /* CONFIG_HYPERV */ 101 102 #endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */ 103