linux/arch/x86/kvm/xen.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
 * Copyright © 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * KVM Xen emulation
 */

#ifndef __ARCH_X86_KVM_XEN_H__
#define __ARCH_X86_KVM_XEN_H__

#include <asm/xen/hypervisor.h>

#ifdef CONFIG_KVM_XEN
#include <linux/jump_label_ratelimit.h>

extern struct static_key_false_deferred kvm_xen_enabled;

int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu);
void kvm_xen_inject_vcpu_vector(struct kvm_vcpu *vcpu);
int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
int kvm_xen_hvm_evtchn_send(struct kvm *kvm, struct kvm_irq_routing_xen_evtchn *evt);
int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
void kvm_xen_init_vm(struct kvm *kvm);
void kvm_xen_destroy_vm(struct kvm *kvm);
void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu);
void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu);
int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe,
			    struct kvm *kvm);
int kvm_xen_setup_evtchn(struct kvm *kvm,
			 struct kvm_kernel_irq_routing_entry *e,
			 const struct kvm_irq_routing_entry *ue);
void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu);

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

static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
{ … }

static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
{ … }

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

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

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

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

void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu);
#else
static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
{
	return 1;
}

static inline void kvm_xen_init_vm(struct kvm *kvm)
{
}

static inline void kvm_xen_destroy_vm(struct kvm *kvm)
{
}

static inline void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu)
{
}

static inline void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu)
{
}

static inline void kvm_xen_sw_enable_lapic(struct kvm_vcpu *vcpu)
{
}

static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
{
	return false;
}

static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
{
	return false;
}

static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
{
	return 0;
}

static inline void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu)
{
}

static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
{
	return false;
}

static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
{
	return 0;
}

static inline void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu)
{
}

static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
{
	return false;
}

static inline void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu)
{
}
#endif

int kvm_xen_hypercall(struct kvm_vcpu *vcpu);

#include <asm/pvclock-abi.h>
#include <asm/xen/interface.h>
#include <xen/interface/vcpu.h>

void kvm_xen_update_runstate(struct kvm_vcpu *vcpu, int state);

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

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

/* 32-bit compatibility definitions, also used natively in 32-bit build */
struct compat_arch_vcpu_info { … };

struct compat_vcpu_info { … }; /* 64 bytes (x86) */

struct compat_arch_shared_info { … };

struct compat_shared_info { … };

#define COMPAT_EVTCHN_2L_NR_CHANNELS …
struct compat_vcpu_runstate_info { … } __attribute__((packed));

struct compat_sched_poll { … };

#endif /* __ARCH_X86_KVM_XEN_H__ */