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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/kvm/arm_psci.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Copyright (C) 2012,2013 - ARM Ltd

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 * Author: Marc Zyngier <[email protected]>

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 */

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#ifndef __KVM_ARM_PSCI_H__

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#define __KVM_ARM_PSCI_H__

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#include <linux/kvm_host.h>

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#include <uapi/linux/psci.h>

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#define KVM_ARM_PSCI_0_1	PSCI_VERSION(0, 1)

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#define KVM_ARM_PSCI_0_2	PSCI_VERSION(0, 2)

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#define KVM_ARM_PSCI_1_0	PSCI_VERSION(1, 0)

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#define KVM_ARM_PSCI_1_1	PSCI_VERSION(1, 1)

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#define KVM_ARM_PSCI_1_2	PSCI_VERSION(1, 2)

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#define KVM_ARM_PSCI_1_3	PSCI_VERSION(1, 3)

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#define KVM_ARM_PSCI_LATEST	KVM_ARM_PSCI_1_3

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static inline int kvm_psci_version(struct kvm_vcpu *vcpu)

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{

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	/*

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	 * Our PSCI implementation stays the same across versions from

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	 * v0.2 onward, only adding the few mandatory functions (such

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	 * as FEATURES with 1.0) that are required by newer

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	 * revisions. It is thus safe to return the latest, unless

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	 * userspace has instructed us otherwise.

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	 */

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	if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) {

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		if (vcpu->kvm->arch.psci_version)

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			return vcpu->kvm->arch.psci_version;

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		return KVM_ARM_PSCI_LATEST;

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	}

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	return KVM_ARM_PSCI_0_1;

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}

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int kvm_psci_call(struct kvm_vcpu *vcpu);

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#endif /* __KVM_ARM_PSCI_H__ */

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