| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2012,2013 - ARM Ltd |
| 4 | * Author: Marc Zyngier <marc.zyngier@arm.com> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 17 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0 |
| 18 | |
| 19 | /* |
| 20 | * We need the KVM pointer independently from the vcpu as we can call |
| 21 | * this from HYP, and need to apply kern_hyp_va on it... |
| 22 | */ |
| 23 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm) |
| 24 | { |
| 25 | /* |
| 26 | * Our PSCI implementation stays the same across versions from |
| 27 | * v0.2 onward, only adding the few mandatory functions (such |
| 28 | * as FEATURES with 1.0) that are required by newer |
| 29 | * revisions. It is thus safe to return the latest, unless |
| 30 | * userspace has instructed us otherwise. |
| 31 | */ |
| 32 | if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) { |
| 33 | if (vcpu->kvm->arch.psci_version) |
| 34 | return vcpu->kvm->arch.psci_version; |
| 35 | |
| 36 | return KVM_ARM_PSCI_LATEST; |
| 37 | } |
| 38 | |
| 39 | return KVM_ARM_PSCI_0_1; |
| 40 | } |
| 41 | |
| 42 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 43 | int kvm_psci_call(struct kvm_vcpu *vcpu); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 44 | |
| 45 | struct kvm_one_reg; |
| 46 | |
| 47 | int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu); |
| 48 | int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); |
| 49 | int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 50 | int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 51 | |
| 52 | #endif /* __KVM_ARM_PSCI_H__ */ |