include/kvm/arm_psci.h

   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__ */