1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * KVM Microsoft Hyper-V emulation 4 * 5 * derived from arch/x86/kvm/x86.c 6 * 7 * Copyright (C) 2006 Qumranet, Inc. 8 * Copyright (C) 2008 Qumranet, Inc. 9 * Copyright IBM Corporation, 2008 10 * Copyright 2010 Red Hat, Inc. and/or its affiliates. 11 * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com> 12 * 13 * Authors: 14 * Avi Kivity <avi@qumranet.com> 15 * Yaniv Kamay <yaniv@qumranet.com> 16 * Amit Shah <amit.shah@qumranet.com> 17 * Ben-Ami Yassour <benami@il.ibm.com> 18 * Andrey Smetanin <asmetanin@virtuozzo.com> 19 */ 20 21 #ifndef __ARCH_X86_KVM_HYPERV_H__ 22 #define __ARCH_X86_KVM_HYPERV_H__ 23 24 #include <linux/kvm_host.h> 25 26 /* 27 * The #defines related to the synthetic debugger are required by KDNet, but 28 * they are not documented in the Hyper-V TLFS because the synthetic debugger 29 * functionality has been deprecated and is subject to removal in future 30 * versions of Windows. 31 */ 32 #define HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS 0x40000080 33 #define HYPERV_CPUID_SYNDBG_INTERFACE 0x40000081 34 #define HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES 0x40000082 35 36 /* 37 * Hyper-V synthetic debugger platform capabilities 38 * These are HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits. 39 */ 40 #define HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING BIT(1) 41 42 /* Hyper-V Synthetic debug options MSR */ 43 #define HV_X64_MSR_SYNDBG_CONTROL 0x400000F1 44 #define HV_X64_MSR_SYNDBG_STATUS 0x400000F2 45 #define HV_X64_MSR_SYNDBG_SEND_BUFFER 0x400000F3 46 #define HV_X64_MSR_SYNDBG_RECV_BUFFER 0x400000F4 47 #define HV_X64_MSR_SYNDBG_PENDING_BUFFER 0x400000F5 48 #define HV_X64_MSR_SYNDBG_OPTIONS 0x400000FF 49 50 /* Hyper-V HV_X64_MSR_SYNDBG_OPTIONS bits */ 51 #define HV_X64_SYNDBG_OPTION_USE_HCALLS BIT(2) 52 53 static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm) 54 { 55 return &kvm->arch.hyperv; 56 } 57 58 static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu) 59 { 60 return vcpu->arch.hyperv; 61 } 62 63 static inline struct kvm_vcpu_hv_synic *to_hv_synic(struct kvm_vcpu *vcpu) 64 { 65 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 66 67 return &hv_vcpu->synic; 68 } 69 70 static inline struct kvm_vcpu *hv_synic_to_vcpu(struct kvm_vcpu_hv_synic *synic) 71 { 72 struct kvm_vcpu_hv *hv_vcpu = container_of(synic, struct kvm_vcpu_hv, synic); 73 74 return hv_vcpu->vcpu; 75 } 76 77 static inline struct kvm_hv_syndbg *to_hv_syndbg(struct kvm_vcpu *vcpu) 78 { 79 return &vcpu->kvm->arch.hyperv.hv_syndbg; 80 } 81 82 static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu) 83 { 84 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 85 86 return hv_vcpu ? hv_vcpu->vp_index : vcpu->vcpu_idx; 87 } 88 89 int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host); 90 int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host); 91 92 bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu); 93 int kvm_hv_hypercall(struct kvm_vcpu *vcpu); 94 95 void kvm_hv_irq_routing_update(struct kvm *kvm); 96 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); 97 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector); 98 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages); 99 100 void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu); 101 102 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu); 103 bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu, 104 struct hv_vp_assist_page *assist_page); 105 106 static inline struct kvm_vcpu_hv_stimer *to_hv_stimer(struct kvm_vcpu *vcpu, 107 int timer_index) 108 { 109 return &to_hv_vcpu(vcpu)->stimer[timer_index]; 110 } 111 112 static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer) 113 { 114 struct kvm_vcpu_hv *hv_vcpu; 115 116 hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv, 117 stimer[0]); 118 return hv_vcpu->vcpu; 119 } 120 121 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu) 122 { 123 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 124 125 if (!hv_vcpu) 126 return false; 127 128 return !bitmap_empty(hv_vcpu->stimer_pending_bitmap, 129 HV_SYNIC_STIMER_COUNT); 130 } 131 132 void kvm_hv_process_stimers(struct kvm_vcpu *vcpu); 133 134 void kvm_hv_setup_tsc_page(struct kvm *kvm, 135 struct pvclock_vcpu_time_info *hv_clock); 136 void kvm_hv_invalidate_tsc_page(struct kvm *kvm); 137 138 void kvm_hv_init_vm(struct kvm *kvm); 139 void kvm_hv_destroy_vm(struct kvm *kvm); 140 void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu); 141 int kvm_hv_set_enforce_cpuid(struct kvm_vcpu *vcpu, bool enforce); 142 int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args); 143 int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, 144 struct kvm_cpuid_entry2 __user *entries); 145 146 #endif 147