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caab277b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | /* |
3 | * Copyright (C) 2012,2013 - ARM Ltd | |
4 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
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5 | */ |
6 | ||
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7 | #ifndef __KVM_ARM_PSCI_H__ |
8 | #define __KVM_ARM_PSCI_H__ | |
dcd2e40c | 9 | |
a4097b35 | 10 | #include <linux/kvm_host.h> |
d0a144f1 MZ |
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) | |
58e0b223 | 15 | #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) |
512865d8 | 16 | #define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1) |
58e0b223 | 17 | |
512865d8 | 18 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1 |
7d0f84aa | 19 | |
dfefa04a | 20 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu) |
a4097b35 MZ |
21 | { |
22 | /* | |
23 | * Our PSCI implementation stays the same across versions from | |
24 | * v0.2 onward, only adding the few mandatory functions (such | |
25 | * as FEATURES with 1.0) that are required by newer | |
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26 | * revisions. It is thus safe to return the latest, unless |
27 | * userspace has instructed us otherwise. | |
a4097b35 | 28 | */ |
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29 | if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) { |
30 | if (vcpu->kvm->arch.psci_version) | |
31 | return vcpu->kvm->arch.psci_version; | |
32 | ||
a4097b35 | 33 | return KVM_ARM_PSCI_LATEST; |
85bd0ba1 | 34 | } |
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35 | |
36 | return KVM_ARM_PSCI_0_1; | |
37 | } | |
38 | ||
39 | ||
55009c6e | 40 | int kvm_psci_call(struct kvm_vcpu *vcpu); |
dcd2e40c | 41 | |
1a2fb94e | 42 | #endif /* __KVM_ARM_PSCI_H__ */ |