| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2012,2013 - ARM Ltd |
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| 4 | * Author: Marc Zyngier <marc.zyngier@arm.com> |
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| 5 | */ |
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| 6 | |
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| 7 | #ifndef __KVM_ARM_PSCI_H__ |
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| 8 | #define __KVM_ARM_PSCI_H__ |
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| 9 | |
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| 10 | #include <linux/kvm_host.h> |
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| 11 | #include <uapi/linux/psci.h> |
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| 12 | |
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| 13 | #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) |
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| 14 | #define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) |
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| 15 | #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) |
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| 16 | #define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1) |
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| 17 | #define KVM_ARM_PSCI_1_2 PSCI_VERSION(1, 2) |
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| 18 | #define KVM_ARM_PSCI_1_3 PSCI_VERSION(1, 3) |
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| 19 | |
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| 20 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_3 |
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| 21 | |
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| 22 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu) |
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| 23 | { |
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| 24 | /* |
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| 25 | * Our PSCI implementation stays the same across versions from |
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| 26 | * v0.2 onward, only adding the few mandatory functions (such |
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| 27 | * as FEATURES with 1.0) that are required by newer |
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| 28 | * revisions. It is thus safe to return the latest, unless |
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| 29 | * userspace has instructed us otherwise. |
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| 30 | */ |
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| 31 | if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) { |
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| 32 | if (vcpu->kvm->arch.psci_version) |
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| 33 | return vcpu->kvm->arch.psci_version; |
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| 34 | |
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| 35 | return KVM_ARM_PSCI_LATEST; |
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| 36 | } |
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| 37 | |
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| 38 | return KVM_ARM_PSCI_0_1; |
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| 39 | } |
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| 40 | |
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| 41 | |
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| 42 | int kvm_psci_call(struct kvm_vcpu *vcpu); |
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| 43 | |
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| 44 | #endif /* __KVM_ARM_PSCI_H__ */ |
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| 45 | |
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