/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012,2013 - ARM Ltd
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 */

#ifndef __KVM_ARM_PSCI_H__
#define __KVM_ARM_PSCI_H__

#include <linux/kvm_host.h>
#include <uapi/linux/psci.h>

#define KVM_ARM_PSCI_0_1        PSCI_VERSION(0, 1)
#define KVM_ARM_PSCI_0_2        PSCI_VERSION(0, 2)
#define KVM_ARM_PSCI_1_0        PSCI_VERSION(1, 0)
#define KVM_ARM_PSCI_1_1        PSCI_VERSION(1, 1)
#define KVM_ARM_PSCI_1_2        PSCI_VERSION(1, 2)
#define KVM_ARM_PSCI_1_3        PSCI_VERSION(1, 3)

#define KVM_ARM_PSCI_LATEST     KVM_ARM_PSCI_1_3

static inline int kvm_psci_version(struct kvm_vcpu *vcpu)
{
        /*
         * Our PSCI implementation stays the same across versions from
         * v0.2 onward, only adding the few mandatory functions (such
         * as FEATURES with 1.0) that are required by newer
         * revisions. It is thus safe to return the latest, unless
         * userspace has instructed us otherwise.
         */
        if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) {
                if (vcpu->kvm->arch.psci_version)
                        return vcpu->kvm->arch.psci_version;

                return KVM_ARM_PSCI_LATEST;
        }

        return KVM_ARM_PSCI_0_1;
}


int kvm_psci_call(struct kvm_vcpu *vcpu);

#endif /* __KVM_ARM_PSCI_H__ */