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 */
kvm_psci_version(struct kvm_vcpu * vcpu,struct kvm * kvm)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