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 /* 21 * We need the KVM pointer independently from the vcpu as we can call 22 * this from HYP, and need to apply kern_hyp_va on it... 23 */ 24 static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm) 25 { 26 /* 27 * Our PSCI implementation stays the same across versions from 28 * v0.2 onward, only adding the few mandatory functions (such 29 * as FEATURES with 1.0) that are required by newer 30 * revisions. It is thus safe to return the latest, unless 31 * userspace has instructed us otherwise. 32 */ 33 if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) { 34 if (vcpu->kvm->arch.psci_version) 35 return vcpu->kvm->arch.psci_version; 36 37 return KVM_ARM_PSCI_LATEST; 38 } 39 40 return KVM_ARM_PSCI_0_1; 41 } 42 43 44 int kvm_psci_call(struct kvm_vcpu *vcpu); 45 46 struct kvm_one_reg; 47 48 int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu); 49 int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); 50 int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 51 int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 52 53 #endif /* __KVM_ARM_PSCI_H__ */ 54