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
vcpu_to_hv_vcpu(struct kvm_vcpu * vcpu)53 static inline struct kvm_vcpu_hv *vcpu_to_hv_vcpu(struct kvm_vcpu *vcpu)
54 {
55 return &vcpu->arch.hyperv;
56 }
57
hv_vcpu_to_vcpu(struct kvm_vcpu_hv * hv_vcpu)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
vcpu_to_synic(struct kvm_vcpu * vcpu)66 static inline struct kvm_vcpu_hv_synic *vcpu_to_synic(struct kvm_vcpu *vcpu)
67 {
68 return &vcpu->arch.hyperv.synic;
69 }
70
synic_to_vcpu(struct kvm_vcpu_hv_synic * synic)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
vcpu_to_hv_syndbg(struct kvm_vcpu * vcpu)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
vcpu_to_stimer(struct kvm_vcpu * vcpu,int timer_index)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
stimer_to_vcpu(struct kvm_vcpu_hv_stimer * stimer)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
kvm_hv_has_stimer_pending(struct kvm_vcpu * vcpu)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
133
