LXR linux/include/kvm/arm

   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
  17#define KVM_ARM_PSCI_LATEST     KVM_ARM_PSCI_1_0
  18
  19/*
  20 * We need the KVM pointer independently from the vcpu as we can call
  21 * this from HYP, and need to apply kern_hyp_va on it...
  22 */
  23static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm)
  24{
  25        /*
  26         * Our PSCI implementation stays the same across versions from
  27         * v0.2 onward, only adding the few mandatory functions (such
  28         * as FEATURES with 1.0) that are required by newer
  29         * revisions. It is thus safe to return the latest, unless
  30         * userspace has instructed us otherwise.
  31         */
  32        if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) {
  33                if (vcpu->kvm->arch.psci_version)
  34                        return vcpu->kvm->arch.psci_version;
  35
  36                return KVM_ARM_PSCI_LATEST;
  37        }
  38
  39        return KVM_ARM_PSCI_0_1;
  40}
  41
  42
  43int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
  44
  45struct kvm_one_reg;
  46
  47int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu);
  48int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
  49int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
  50int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
  51
  52#endif /* __KVM_ARM_PSCI_H__ */
  53