Thomas Gleixner | caab277 | 2019-06-03 07:44:50 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Marc Zyngier | dcd2e40 | 2012-12-12 18:52:05 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2012,2013 - ARM Ltd |
| 4 | * Author: Marc Zyngier <[email protected]> |
Marc Zyngier | dcd2e40 | 2012-12-12 18:52:05 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
Marc Zyngier | 1a2fb94e | 2018-02-06 17:56:08 +0000 | [diff] [blame] | 7 | #ifndef __KVM_ARM_PSCI_H__ |
| 8 | #define __KVM_ARM_PSCI_H__ |
Marc Zyngier | dcd2e40 | 2012-12-12 18:52:05 +0000 | [diff] [blame] | 9 | |
Marc Zyngier | a4097b3 | 2018-02-06 17:56:13 +0000 | [diff] [blame] | 10 | #include <linux/kvm_host.h> |
Marc Zyngier | d0a144f | 2018-02-06 17:56:09 +0000 | [diff] [blame] | 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) |
Marc Zyngier | 58e0b22 | 2018-02-06 17:56:11 +0000 | [diff] [blame] | 15 | #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) |
Will Deacon | 512865d | 2022-02-21 15:35:22 +0000 | [diff] [blame] | 16 | #define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1) |
Marc Zyngier | 58e0b22 | 2018-02-06 17:56:11 +0000 | [diff] [blame] | 17 | |
Will Deacon | 512865d | 2022-02-21 15:35:22 +0000 | [diff] [blame] | 18 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1 |
Anup Patel | 7d0f84a | 2014-04-29 11:24:16 +0530 | [diff] [blame] | 19 | |
Oliver Upton | dfefa04 | 2022-02-08 01:27:05 +0000 | [diff] [blame] | 20 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu) |
Marc Zyngier | a4097b3 | 2018-02-06 17:56:13 +0000 | [diff] [blame] | 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 |
Marc Zyngier | 85bd0ba | 2018-01-21 16:42:56 +0000 | [diff] [blame] | 26 | * revisions. It is thus safe to return the latest, unless |
| 27 | * userspace has instructed us otherwise. |
Marc Zyngier | a4097b3 | 2018-02-06 17:56:13 +0000 | [diff] [blame] | 28 | */ |
Marc Zyngier | 85bd0ba | 2018-01-21 16:42:56 +0000 | [diff] [blame] | 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 | |
Marc Zyngier | a4097b3 | 2018-02-06 17:56:13 +0000 | [diff] [blame] | 33 | return KVM_ARM_PSCI_LATEST; |
Marc Zyngier | 85bd0ba | 2018-01-21 16:42:56 +0000 | [diff] [blame] | 34 | } |
Marc Zyngier | a4097b3 | 2018-02-06 17:56:13 +0000 | [diff] [blame] | 35 | |
| 36 | return KVM_ARM_PSCI_0_1; |
| 37 | } |
| 38 | |
| 39 | |
Christoffer Dall | 55009c6 | 2019-10-21 16:28:15 +0100 | [diff] [blame] | 40 | int kvm_psci_call(struct kvm_vcpu *vcpu); |
Marc Zyngier | dcd2e40 | 2012-12-12 18:52:05 +0000 | [diff] [blame] | 41 | |
Marc Zyngier | 1a2fb94e | 2018-02-06 17:56:08 +0000 | [diff] [blame] | 42 | #endif /* __KVM_ARM_PSCI_H__ */ |