arch/x86/kvm/hyperv.h

   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 : kvm_vcpu_get_idx(vcpu);
  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_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args);
 142 int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 143                      struct kvm_cpuid_entry2 __user *entries);
 144
 145 #endif