| 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 | |
|---|
