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Diffstat (limited to 'include/kvm/arm_psci.h')
| -rw-r--r-- | include/kvm/arm_psci.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/kvm/arm_psci.h b/include/kvm/arm_psci.h new file mode 100644 index 000000000..6e55b9283 --- /dev/null +++ b/include/kvm/arm_psci.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012,2013 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@arm.com> + */ + +#ifndef __KVM_ARM_PSCI_H__ +#define __KVM_ARM_PSCI_H__ + +#include <linux/kvm_host.h> +#include <uapi/linux/psci.h> + +#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) +#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) +#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) +#define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1) + +#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1 + +static inline int kvm_psci_version(struct kvm_vcpu *vcpu) +{ + /* + * Our PSCI implementation stays the same across versions from + * v0.2 onward, only adding the few mandatory functions (such + * as FEATURES with 1.0) that are required by newer + * revisions. It is thus safe to return the latest, unless + * userspace has instructed us otherwise. + */ + if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) { + if (vcpu->kvm->arch.psci_version) + return vcpu->kvm->arch.psci_version; + + return KVM_ARM_PSCI_LATEST; + } + + return KVM_ARM_PSCI_0_1; +} + + +int kvm_psci_call(struct kvm_vcpu *vcpu); + +#endif /* __KVM_ARM_PSCI_H__ */ |