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[J-linux.git] / include / kvm / arm_psci.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012,2013 - ARM Ltd
4  * Author: Marc Zyngier <[email protected]>
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
22 static 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
42 int kvm_psci_call(struct kvm_vcpu *vcpu);
43
44 #endif /* __KVM_ARM_PSCI_H__ */
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