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 | |
18 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1 |
19 | |
20 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu) |
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 |
26 | * revisions. It is thus safe to return the latest, unless |
27 | * 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 | |
40 | int kvm_psci_call(struct kvm_vcpu *vcpu); |
41 | |
42 | #endif /* __KVM_ARM_PSCI_H__ */ |
43 | |