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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2012,2013 - ARM Ltd4 * Author: Marc Zyngier <marc.zyngier@arm.com>5 */6 7#ifndef __KVM_ARM_PSCI_H__8#define __KVM_ARM_PSCI_H__9 10#include <linux/kvm_host.h>11#include <uapi/linux/psci.h>12 13#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)14#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)15#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)16#define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1)17 18#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_119 20static inline int kvm_psci_version(struct kvm_vcpu *vcpu)21{22 /*23 * Our PSCI implementation stays the same across versions from24 * v0.2 onward, only adding the few mandatory functions (such25 * as FEATURES with 1.0) that are required by newer26 * revisions. It is thus safe to return the latest, unless27 * userspace has instructed us otherwise.28 */29 if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) {30 if (vcpu->kvm->arch.psci_version)31 return vcpu->kvm->arch.psci_version;32 33 return KVM_ARM_PSCI_LATEST;34 }35 36 return KVM_ARM_PSCI_0_1;37}38 39 40int kvm_psci_call(struct kvm_vcpu *vcpu);41 42#endif /* __KVM_ARM_PSCI_H__ */43