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1 | /* | |
2 | * Copyright (C) 2012,2013 - ARM Ltd | |
3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #ifndef __KVM_ARM_PSCI_H__ | |
19 | #define __KVM_ARM_PSCI_H__ | |
20 | ||
21 | #include <linux/kvm_host.h> | |
22 | #include <uapi/linux/psci.h> | |
23 | ||
24 | #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) | |
25 | #define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) | |
26 | #define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) | |
27 | ||
28 | #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0 | |
29 | ||
30 | /* | |
31 | * We need the KVM pointer independently from the vcpu as we can call | |
32 | * this from HYP, and need to apply kern_hyp_va on it... | |
33 | */ | |
34 | static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm) | |
35 | { | |
36 | /* | |
37 | * Our PSCI implementation stays the same across versions from | |
38 | * v0.2 onward, only adding the few mandatory functions (such | |
39 | * as FEATURES with 1.0) that are required by newer | |
40 | * revisions. It is thus safe to return the latest, unless | |
41 | * userspace has instructed us otherwise. | |
42 | */ | |
43 | if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) { | |
44 | if (vcpu->kvm->arch.psci_version) | |
45 | return vcpu->kvm->arch.psci_version; | |
46 | ||
47 | return KVM_ARM_PSCI_LATEST; | |
48 | } | |
49 | ||
50 | return KVM_ARM_PSCI_0_1; | |
51 | } | |
52 | ||
53 | ||
54 | int kvm_hvc_call_handler(struct kvm_vcpu *vcpu); | |
55 | ||
56 | struct kvm_one_reg; | |
57 | ||
58 | int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu); | |
59 | int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); | |
60 | int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
61 | int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
62 | ||
63 | #endif /* __KVM_ARM_PSCI_H__ */ |