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 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 43 int kvm_hvc_call_handler(struct kvm_vcpu *vcpu); 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__ */ 53