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 
to_kvm_hv(struct kvm * kvm)53 static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm)
54 {
55 	return &kvm->arch.hyperv;
56 }
57 
to_hv_vcpu(struct kvm_vcpu * vcpu)58 static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu)
59 {
60 	return vcpu->arch.hyperv;
61 }
62 
to_hv_synic(struct kvm_vcpu * vcpu)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 
hv_synic_to_vcpu(struct kvm_vcpu_hv_synic * synic)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 
to_hv_syndbg(struct kvm_vcpu * vcpu)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 
kvm_hv_get_vpindex(struct kvm_vcpu * vcpu)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 
kvm_hv_hypercall_enabled(struct kvm_vcpu * vcpu)92 static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
93 {
94 	return vcpu->arch.hyperv_enabled && to_kvm_hv(vcpu->kvm)->hv_guest_os_id;
95 }
96 
97 int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
98 
99 void kvm_hv_irq_routing_update(struct kvm *kvm);
100 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
101 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
102 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
103 
104 void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);
105 
106 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);
107 bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,
108 			    struct hv_vp_assist_page *assist_page);
109 
to_hv_stimer(struct kvm_vcpu * vcpu,int timer_index)110 static inline struct kvm_vcpu_hv_stimer *to_hv_stimer(struct kvm_vcpu *vcpu,
111 						      int timer_index)
112 {
113 	return &to_hv_vcpu(vcpu)->stimer[timer_index];
114 }
115 
hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer * stimer)116 static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer)
117 {
118 	struct kvm_vcpu_hv *hv_vcpu;
119 
120 	hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv,
121 			       stimer[0]);
122 	return hv_vcpu->vcpu;
123 }
124 
kvm_hv_has_stimer_pending(struct kvm_vcpu * vcpu)125 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
126 {
127 	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
128 
129 	if (!hv_vcpu)
130 		return false;
131 
132 	return !bitmap_empty(hv_vcpu->stimer_pending_bitmap,
133 			     HV_SYNIC_STIMER_COUNT);
134 }
135 
136 void kvm_hv_process_stimers(struct kvm_vcpu *vcpu);
137 
138 void kvm_hv_setup_tsc_page(struct kvm *kvm,
139 			   struct pvclock_vcpu_time_info *hv_clock);
140 void kvm_hv_request_tsc_page_update(struct kvm *kvm);
141 
142 void kvm_hv_init_vm(struct kvm *kvm);
143 void kvm_hv_destroy_vm(struct kvm *kvm);
144 void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu);
145 int kvm_hv_set_enforce_cpuid(struct kvm_vcpu *vcpu, bool enforce);
146 int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args);
147 int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
148 		     struct kvm_cpuid_entry2 __user *entries);
149 
150 #endif
151