1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2012,2013 - ARM Ltd
4*4882a593Smuzhiyun * Author: Marc Zyngier <marc.zyngier@arm.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef __KVM_ARM_PSCI_H__
8*4882a593Smuzhiyun #define __KVM_ARM_PSCI_H__
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kvm_host.h>
11*4882a593Smuzhiyun #include <uapi/linux/psci.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)
14*4882a593Smuzhiyun #define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)
15*4882a593Smuzhiyun #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /*
20*4882a593Smuzhiyun * We need the KVM pointer independently from the vcpu as we can call
21*4882a593Smuzhiyun * this from HYP, and need to apply kern_hyp_va on it...
22*4882a593Smuzhiyun */
kvm_psci_version(struct kvm_vcpu * vcpu,struct kvm * kvm)23*4882a593Smuzhiyun static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun /*
26*4882a593Smuzhiyun * Our PSCI implementation stays the same across versions from
27*4882a593Smuzhiyun * v0.2 onward, only adding the few mandatory functions (such
28*4882a593Smuzhiyun * as FEATURES with 1.0) that are required by newer
29*4882a593Smuzhiyun * revisions. It is thus safe to return the latest, unless
30*4882a593Smuzhiyun * userspace has instructed us otherwise.
31*4882a593Smuzhiyun */
32*4882a593Smuzhiyun if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) {
33*4882a593Smuzhiyun if (vcpu->kvm->arch.psci_version)
34*4882a593Smuzhiyun return vcpu->kvm->arch.psci_version;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return KVM_ARM_PSCI_LATEST;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun return KVM_ARM_PSCI_0_1;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun int kvm_psci_call(struct kvm_vcpu *vcpu);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun struct kvm_one_reg;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu);
48*4882a593Smuzhiyun int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
49*4882a593Smuzhiyun int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
50*4882a593Smuzhiyun int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun #endif /* __KVM_ARM_PSCI_H__ */
53