linux/arch/x86/kvm/hyperv.h

/* 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 <[email protected]>
 *
 * Authors:
 *   Avi Kivity   <[email protected]>
 *   Yaniv Kamay  <[email protected]>
 *   Amit Shah    <[email protected]>
 *   Ben-Ami Yassour <[email protected]>
 *   Andrey Smetanin <[email protected]>
 */

#ifndef __ARCH_X86_KVM_HYPERV_H__
#define __ARCH_X86_KVM_HYPERV_H__

#include <linux/kvm_host.h>
#include "x86.h"

#ifdef CONFIG_KVM_HYPERV

/* "Hv#1" signature */
#define HYPERV_CPUID_SIGNATURE_EAX …

/*
 * 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 …
#define HYPERV_CPUID_SYNDBG_INTERFACE …
#define HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES …

/*
 * Hyper-V synthetic debugger platform capabilities
 * These are HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits.
 */
#define HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING …

/* Hyper-V Synthetic debug options MSR */
#define HV_X64_MSR_SYNDBG_CONTROL …
#define HV_X64_MSR_SYNDBG_STATUS …
#define HV_X64_MSR_SYNDBG_SEND_BUFFER …
#define HV_X64_MSR_SYNDBG_RECV_BUFFER …
#define HV_X64_MSR_SYNDBG_PENDING_BUFFER …
#define HV_X64_MSR_SYNDBG_OPTIONS …

/* Hyper-V HV_X64_MSR_SYNDBG_OPTIONS bits */
#define HV_X64_SYNDBG_OPTION_USE_HCALLS …

static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm)
{ … }

static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu)
{ … }

static inline struct kvm_vcpu_hv_synic *to_hv_synic(struct kvm_vcpu *vcpu)
{ … }

static inline struct kvm_vcpu *hv_synic_to_vcpu(struct kvm_vcpu_hv_synic *synic)
{ … }

static inline struct kvm_hv_syndbg *to_hv_syndbg(struct kvm_vcpu *vcpu)
{ … }

static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu)
{ … }

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)
{ … }

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);

static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
{ … }

static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
{ … }

void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);

bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);
int kvm_hv_get_assist_page(struct kvm_vcpu *vcpu);

static inline struct kvm_vcpu_hv_stimer *to_hv_stimer(struct kvm_vcpu *vcpu,
						      int timer_index)
{ … }

static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer)
{ … }

static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
{ … }

/*
 * With HV_ACCESS_TSC_INVARIANT feature, invariant TSC (CPUID.80000007H:EDX[8])
 * is only observed after HV_X64_MSR_TSC_INVARIANT_CONTROL was written to.
 */
static inline bool kvm_hv_invtsc_suppressed(struct kvm_vcpu *vcpu)
{ … }

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_xsaves_xsavec_maybe_warn(struct kvm_vcpu *vcpu);

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);

static inline struct kvm_vcpu_hv_tlb_flush_fifo *kvm_hv_get_tlb_flush_fifo(struct kvm_vcpu *vcpu,
									   bool is_guest_mode)
{ … }

static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu)
{ … }

static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu)
{ … }

static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)
{ … }

static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
{ … }

static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu,
						     bool tdp_enabled)
{ … }

int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);
#else /* CONFIG_KVM_HYPERV */
static inline void kvm_hv_setup_tsc_page(struct kvm *kvm,
					 struct pvclock_vcpu_time_info *hv_clock) {}
static inline void kvm_hv_request_tsc_page_update(struct kvm *kvm) {}
static inline void kvm_hv_xsaves_xsavec_maybe_warn(struct kvm_vcpu *vcpu) {}
static inline void kvm_hv_init_vm(struct kvm *kvm) {}
static inline void kvm_hv_destroy_vm(struct kvm *kvm) {}
static inline int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
{
	return 0;
}
static inline void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu) {}
static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
{
	return false;
}
static inline int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
{
	return HV_STATUS_ACCESS_DENIED;
}
static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) {}
static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
{
	return false;
}
static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
{
	return false;
}
static inline void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector) {}
static inline bool kvm_hv_invtsc_suppressed(struct kvm_vcpu *vcpu)
{
	return false;
}
static inline void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled) {}
static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
{
	return false;
}
static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)
{
	return false;
}
static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu)
{
	return false;
}
static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
{
	return 0;
}
static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu)
{
	return vcpu->vcpu_idx;
}
static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool tdp_enabled) {}
#endif /* CONFIG_KVM_HYPERV */

#endif /* __ARCH_X86_KVM_HYPERV_H__ */