| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2012,2013 - ARM Ltd |
| * Author: Marc Zyngier <marc.zyngier@arm.com> |
| */ |
| |
| #ifndef __KVM_ARM_PSCI_H__ |
| #define __KVM_ARM_PSCI_H__ |
| |
| #include <linux/kvm_host.h> |
| #include <uapi/linux/psci.h> |
| |
| #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) |
| #define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) |
| #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) |
| #define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1) |
| |
| #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1 |
| |
| static inline int kvm_psci_version(struct kvm_vcpu *vcpu) |
| { |
| /* |
| * Our PSCI implementation stays the same across versions from |
| * v0.2 onward, only adding the few mandatory functions (such |
| * as FEATURES with 1.0) that are required by newer |
| * revisions. It is thus safe to return the latest, unless |
| * userspace has instructed us otherwise. |
| */ |
| if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) { |
| if (vcpu->kvm->arch.psci_version) |
| return vcpu->kvm->arch.psci_version; |
| |
| return KVM_ARM_PSCI_LATEST; |
| } |
| |
| return KVM_ARM_PSCI_0_1; |
| } |
| |
| |
| int kvm_psci_call(struct kvm_vcpu *vcpu); |
| |
| #endif /* __KVM_ARM_PSCI_H__ */ |
