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. 41 */ 42 if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) 43 return KVM_ARM_PSCI_LATEST; 44 45 return KVM_ARM_PSCI_0_1; 46 } 47 48 49 int kvm_hvc_call_handler(struct kvm_vcpu *vcpu); 50 51 #endif /* __KVM_ARM_PSCI_H__ */ 52