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_vcpu_hv *vcpu_to_hv_vcpu(struct kvm_vcpu *vcpu)
  54 {
  55         return &vcpu->arch.hyperv;
  56 }
  57
  58 static inline struct kvm_vcpu *hv_vcpu_to_vcpu(struct kvm_vcpu_hv *hv_vcpu)
  59 {
  60         struct kvm_vcpu_arch *arch;
  61
  62         arch = container_of(hv_vcpu, struct kvm_vcpu_arch, hyperv);
  63         return container_of(arch, struct kvm_vcpu, arch);
  64 }
  65
  66 static inline struct kvm_vcpu_hv_synic *vcpu_to_synic(struct kvm_vcpu *vcpu)
  67 {
  68         return &vcpu->arch.hyperv.synic;
  69 }
  70
  71 static inline struct kvm_vcpu *synic_to_vcpu(struct kvm_vcpu_hv_synic *synic)
  72 {
  73         return hv_vcpu_to_vcpu(container_of(synic, struct kvm_vcpu_hv, synic));
  74 }
  75
  76 static inline struct kvm_hv_syndbg *vcpu_to_hv_syndbg(struct kvm_vcpu *vcpu)
  77 {
  78         return &vcpu->kvm->arch.hyperv.hv_syndbg;
  79 }
  80
  81 int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host);
  82 int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host);
  83
  84 bool kvm_hv_hypercall_enabled(struct kvm *kvm);
  85 int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
  86
  87 void kvm_hv_irq_routing_update(struct kvm *kvm);
  88 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
  89 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
  90 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
  91
  92 void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu);
  93 void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu);
  94 void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);
  95
  96 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);
  97 bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,
  98                             struct hv_vp_assist_page *assist_page);
  99
 100 static inline struct kvm_vcpu_hv_stimer *vcpu_to_stimer(struct kvm_vcpu *vcpu,
 101                                                         int timer_index)
 102 {
 103         return &vcpu_to_hv_vcpu(vcpu)->stimer[timer_index];
 104 }
 105
 106 static inline struct kvm_vcpu *stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer)
 107 {
 108         struct kvm_vcpu_hv *hv_vcpu;
 109
 110         hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv,
 111                                stimer[0]);
 112         return hv_vcpu_to_vcpu(hv_vcpu);
 113 }
 114
 115 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
 116 {
 117         return !bitmap_empty(vcpu->arch.hyperv.stimer_pending_bitmap,
 118                              HV_SYNIC_STIMER_COUNT);
 119 }
 120
 121 void kvm_hv_process_stimers(struct kvm_vcpu *vcpu);
 122
 123 void kvm_hv_setup_tsc_page(struct kvm *kvm,
 124                            struct pvclock_vcpu_time_info *hv_clock);
 125
 126 void kvm_hv_init_vm(struct kvm *kvm);
 127 void kvm_hv_destroy_vm(struct kvm *kvm);
 128 int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args);
 129 int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 130                                 struct kvm_cpuid_entry2 __user *entries);
 131
 132 #endif