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
 53static inline struct kvm_vcpu_hv *vcpu_to_hv_vcpu(struct kvm_vcpu *vcpu)
 54{
 55	return &vcpu->arch.hyperv;
 56}
 57
 58static 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
 66static inline struct kvm_vcpu_hv_synic *vcpu_to_synic(struct kvm_vcpu *vcpu)
 67{
 68	return &vcpu->arch.hyperv.synic;
 69}
 70
 71static 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
 76static inline struct kvm_hv_syndbg *vcpu_to_hv_syndbg(struct kvm_vcpu *vcpu)
 77{
 78	return &vcpu->kvm->arch.hyperv.hv_syndbg;
 79}
 80
 81int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host);
 82int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host);
 83
 84bool kvm_hv_hypercall_enabled(struct kvm *kvm);
 85int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
 86
 87void kvm_hv_irq_routing_update(struct kvm *kvm);
 88int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
 89void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
 90int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
 91
 92void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu);
 93void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu);
 94void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);
 95
 96bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);
 97bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,
 98			    struct hv_vp_assist_page *assist_page);
 99
100static 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
106static 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
115static 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
121void kvm_hv_process_stimers(struct kvm_vcpu *vcpu);
122
123void kvm_hv_setup_tsc_page(struct kvm *kvm,
124			   struct pvclock_vcpu_time_info *hv_clock);
125
126void kvm_hv_init_vm(struct kvm *kvm);
127void kvm_hv_destroy_vm(struct kvm *kvm);
128int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args);
129int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
130				struct kvm_cpuid_entry2 __user *entries);
131
132#endif