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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012,2013 - ARM Ltd
4 * 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#define KVM_ARM_PSCI_1_2 PSCI_VERSION(1, 2)
18#define KVM_ARM_PSCI_1_3 PSCI_VERSION(1, 3)
19
20#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_3
21
22static inline int kvm_psci_version(struct kvm_vcpu *vcpu)
23{
24 /*
25 * Our PSCI implementation stays the same across versions from
26 * v0.2 onward, only adding the few mandatory functions (such
27 * as FEATURES with 1.0) that are required by newer
28 * revisions. It is thus safe to return the latest, unless
29 * userspace has instructed us otherwise.
30 */
31 if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) {
32 if (vcpu->kvm->arch.psci_version)
33 return vcpu->kvm->arch.psci_version;
34
35 return KVM_ARM_PSCI_LATEST;
36 }
37
38 return KVM_ARM_PSCI_0_1;
39}
40
41
42int kvm_psci_call(struct kvm_vcpu *vcpu);
43
44#endif /* __KVM_ARM_PSCI_H__ */