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_direct_tlbflush(struct kvm_vcpu *vcpu); 17 18 static inline void svm_hv_init_vmcb(struct vmcb *vmcb) 19 { 20 struct hv_enlightenments *hve = 21 (struct hv_enlightenments *)vmcb->control.reserved_sw; 22 23 if (npt_enabled && 24 ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) 25 hve->hv_enlightenments_control.enlightened_npt_tlb = 1; 26 27 if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP) 28 hve->hv_enlightenments_control.msr_bitmap = 1; 29 } 30 31 static inline void svm_hv_hardware_setup(void) 32 { 33 if (npt_enabled && 34 ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) { 35 pr_info("kvm: Hyper-V enlightened NPT TLB flush enabled\n"); 36 svm_x86_ops.tlb_remote_flush = hv_remote_flush_tlb; 37 svm_x86_ops.tlb_remote_flush_with_range = 38 hv_remote_flush_tlb_with_range; 39 } 40 41 if (ms_hyperv.nested_features & HV_X64_NESTED_DIRECT_FLUSH) { 42 int cpu; 43 44 pr_info("kvm: Hyper-V Direct TLB Flush enabled\n"); 45 for_each_online_cpu(cpu) { 46 struct hv_vp_assist_page *vp_ap = 47 hv_get_vp_assist_page(cpu); 48 49 if (!vp_ap) 50 continue; 51 52 vp_ap->nested_control.features.directhypercall = 1; 53 } 54 svm_x86_ops.enable_direct_tlbflush = 55 svm_hv_enable_direct_tlbflush; 56 } 57 } 58 59 static inline void svm_hv_vmcb_dirty_nested_enlightenments( 60 struct kvm_vcpu *vcpu) 61 { 62 struct vmcb *vmcb = to_svm(vcpu)->vmcb; 63 struct hv_enlightenments *hve = 64 (struct hv_enlightenments *)vmcb->control.reserved_sw; 65 66 if (hve->hv_enlightenments_control.msr_bitmap) 67 vmcb_mark_dirty(vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS); 68 } 69 70 static inline void svm_hv_update_vp_id(struct vmcb *vmcb, 71 struct kvm_vcpu *vcpu) 72 { 73 struct hv_enlightenments *hve = 74 (struct hv_enlightenments *)vmcb->control.reserved_sw; 75 u32 vp_index = kvm_hv_get_vpindex(vcpu); 76 77 if (hve->hv_vp_id != vp_index) { 78 hve->hv_vp_id = vp_index; 79 vmcb_mark_dirty(vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS); 80 } 81 } 82 #else 83 84 static inline void svm_hv_init_vmcb(struct vmcb *vmcb) 85 { 86 } 87 88 static inline void svm_hv_hardware_setup(void) 89 { 90 } 91 92 static inline void svm_hv_vmcb_dirty_nested_enlightenments( 93 struct kvm_vcpu *vcpu) 94 { 95 } 96 97 static inline void svm_hv_update_vp_id(struct vmcb *vmcb, 98 struct kvm_vcpu *vcpu) 99 { 100 } 101 #endif /* CONFIG_HYPERV */ 102 103 #endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */ 104