include/kvm/arm_spci.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2020 Google LLC
 * Author: Will Deacon <will@kernel.org>
 */

#ifndef __KVM_ARM_SPCI_H
#define __KVM_ARM_SPCI_H

#include <linux/of_reserved_mem.h>
#include <linux/kobject.h>

enum kvm_spci_mem_prot {
	KVM_SPCI_MEM_PROT_X	= 1 << 0,
	KVM_SPCI_MEM_PROT_W	= 1 << 1,
	KVM_SPCI_MEM_PROT_R	= 1 << 2,
};

struct kvm_spci_memory {
	struct reserved_mem	*rmem;		/* Physical carveout */
	phys_addr_t		ipa_base;
	phys_addr_t		ipa_size;	/* Size of guest region */
	enum kvm_spci_mem_prot	prot;
};

struct kvm_spci_partition {
	struct kobject		kobj;
	struct list_head	list;
	int			id;
	uuid_t			uuid;
	u64			entry_point;
	int			nr_vcpus;
	int			nr_mems;
	bool			is_32bit;
	struct kvm		*kvm;
	struct kvm_spci_memory	*mems[];
};

#ifdef CONFIG_KVM_ARM_SPCI

int kvm_spci_init(void);
bool kvm_spci_supported(void);
int kvm_spci_init_vm(struct kvm *kvm, unsigned long type);
void kvm_spci_destroy_vm(struct kvm *kvm);
int kvm_spci_check_vcpu_init_features(const struct kvm_vcpu *vcpu,
				      const struct kvm_vcpu_init *init);
int kvm_spci_vcpu_first_run_init(struct kvm_vcpu *vcpu);
int kvm_spci_vcpu_reg_list_num(struct kvm_vcpu *vcpu, unsigned long *num);
int kvm_spci_vcpu_reg_list(struct kvm_vcpu *vcpu, u64 __user *uindices);
int kvm_spci_check_vcpu_access_reg(struct kvm_vcpu *vcpu,
				   struct kvm_one_reg *reg);

#else

static inline int kvm_spci_init(void) { return 0; }
static inline bool kvm_spci_supported(void) { return false; }
static inline int kvm_spci_init_vm(struct kvm *kvm, unsigned long type)
{
	return 0;
}
static inline void kvm_spci_destroy_vm(struct kvm *kvm) {}
static inline int kvm_spci_check_vcpu_init_features(const struct kvm_vcpu *vcpu,
				      const struct kvm_vcpu_init *init)
{
	return 0;
}
static inline int kvm_spci_vcpu_first_run_init(struct kvm_vcpu *vcpu)
{
	return 0;
}
int kvm_spci_check_vcpu_access_reg(struct kvm_vcpu *vcpu,
				   struct kvm_one_reg *reg)
{
	return 0;
}

#endif /* CONFIG_KVM_ARM_SPCI */
#endif	/* __KVM_ARM_SPCI_H */