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Diffstat (limited to 'arch/x86/kvm/hyperv.h')
| -rw-r--r-- | arch/x86/kvm/hyperv.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h new file mode 100644 index 000000000..1030b1b50 --- /dev/null +++ b/arch/x86/kvm/hyperv.h @@ -0,0 +1,154 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * KVM Microsoft Hyper-V emulation + * + * derived from arch/x86/kvm/x86.c + * + * Copyright (C) 2006 Qumranet, Inc. + * Copyright (C) 2008 Qumranet, Inc. + * Copyright IBM Corporation, 2008 + * Copyright 2010 Red Hat, Inc. and/or its affiliates. + * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com> + * + * Authors: + * Avi Kivity <avi@qumranet.com> + * Yaniv Kamay <yaniv@qumranet.com> + * Amit Shah <amit.shah@qumranet.com> + * Ben-Ami Yassour <benami@il.ibm.com> + * Andrey Smetanin <asmetanin@virtuozzo.com> + */ + +#ifndef __ARCH_X86_KVM_HYPERV_H__ +#define __ARCH_X86_KVM_HYPERV_H__ + +#include <linux/kvm_host.h> + +/* "Hv#1" signature */ +#define HYPERV_CPUID_SIGNATURE_EAX 0x31237648 + +/* + * The #defines related to the synthetic debugger are required by KDNet, but + * they are not documented in the Hyper-V TLFS because the synthetic debugger + * functionality has been deprecated and is subject to removal in future + * versions of Windows. + */ +#define HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS 0x40000080 +#define HYPERV_CPUID_SYNDBG_INTERFACE 0x40000081 +#define HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES 0x40000082 + +/* + * Hyper-V synthetic debugger platform capabilities + * These are HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits. + */ +#define HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING BIT(1) + +/* Hyper-V Synthetic debug options MSR */ +#define HV_X64_MSR_SYNDBG_CONTROL 0x400000F1 +#define HV_X64_MSR_SYNDBG_STATUS 0x400000F2 +#define HV_X64_MSR_SYNDBG_SEND_BUFFER 0x400000F3 +#define HV_X64_MSR_SYNDBG_RECV_BUFFER 0x400000F4 +#define HV_X64_MSR_SYNDBG_PENDING_BUFFER 0x400000F5 +#define HV_X64_MSR_SYNDBG_OPTIONS 0x400000FF + +/* Hyper-V HV_X64_MSR_SYNDBG_OPTIONS bits */ +#define HV_X64_SYNDBG_OPTION_USE_HCALLS BIT(2) + +static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm) +{ + return &kvm->arch.hyperv; +} + +static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.hyperv; +} + +static inline struct kvm_vcpu_hv_synic *to_hv_synic(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + + return &hv_vcpu->synic; +} + +static inline struct kvm_vcpu *hv_synic_to_vcpu(struct kvm_vcpu_hv_synic *synic) +{ + struct kvm_vcpu_hv *hv_vcpu = container_of(synic, struct kvm_vcpu_hv, synic); + + return hv_vcpu->vcpu; +} + +static inline struct kvm_hv_syndbg *to_hv_syndbg(struct kvm_vcpu *vcpu) +{ + return &vcpu->kvm->arch.hyperv.hv_syndbg; +} + +static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + + return hv_vcpu ? hv_vcpu->vp_index : vcpu->vcpu_idx; +} + +int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host); +int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host); + +static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.hyperv_enabled && to_kvm_hv(vcpu->kvm)->hv_guest_os_id; +} + +int kvm_hv_hypercall(struct kvm_vcpu *vcpu); + +void kvm_hv_irq_routing_update(struct kvm *kvm); +int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); +void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector); +int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages); + +void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu); + +bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu); +bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu, + struct hv_vp_assist_page *assist_page); + +static inline struct kvm_vcpu_hv_stimer *to_hv_stimer(struct kvm_vcpu *vcpu, + int timer_index) +{ + return &to_hv_vcpu(vcpu)->stimer[timer_index]; +} + +static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer) +{ + struct kvm_vcpu_hv *hv_vcpu; + + hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv, + stimer[0]); + return hv_vcpu->vcpu; +} + +static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + + if (!hv_vcpu) + return false; + + return !bitmap_empty(hv_vcpu->stimer_pending_bitmap, + HV_SYNIC_STIMER_COUNT); +} + +void kvm_hv_process_stimers(struct kvm_vcpu *vcpu); + +void kvm_hv_setup_tsc_page(struct kvm *kvm, + struct pvclock_vcpu_time_info *hv_clock); +void kvm_hv_request_tsc_page_update(struct kvm *kvm); + +void kvm_hv_init_vm(struct kvm *kvm); +void kvm_hv_destroy_vm(struct kvm *kvm); +int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); +void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled); +int kvm_hv_set_enforce_cpuid(struct kvm_vcpu *vcpu, bool enforce); +int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args); +int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, + struct kvm_cpuid_entry2 __user *entries); + +#endif |