arm_psci.h

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/* 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_LATEST KVM_ARM_PSCI_1_1
 
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__ */