9fb1fb85fa
Move some PSCI functions and macros to a shared header to be used by hyp in protected mode. No functional change intended. Signed-off-by: Fuad Tabba <tabba@google.com> Signed-off-by: Will Deacon <willdeacon@google.com> Bug: 233587962 Change-Id: Ibe84564f423cd0281f3dc33d9801b474fe8f2db9 Signed-off-by: Quentin Perret <qperret@google.com>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012,2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*/
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#ifndef __KVM_ARM_PSCI_H__
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#define __KVM_ARM_PSCI_H__
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#include <linux/kvm_host.h>
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#include <uapi/linux/psci.h>
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#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)
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#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)
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#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)
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#define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1)
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#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1
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static inline int kvm_psci_version(struct kvm_vcpu *vcpu)
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{
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/*
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* Our PSCI implementation stays the same across versions from
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* v0.2 onward, only adding the few mandatory functions (such
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* as FEATURES with 1.0) that are required by newer
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* revisions. It is thus safe to return the latest, unless
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* userspace has instructed us otherwise.
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*/
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if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) {
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if (vcpu->kvm->arch.psci_version)
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return vcpu->kvm->arch.psci_version;
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return KVM_ARM_PSCI_LATEST;
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}
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return KVM_ARM_PSCI_0_1;
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}
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/* Narrow the PSCI register arguments (r1 to r3) to 32 bits. */
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static inline void kvm_psci_narrow_to_32bit(struct kvm_vcpu *vcpu)
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{
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int i;
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/*
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* Zero the input registers' upper 32 bits. They will be fully
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* zeroed on exit, so we're fine changing them in place.
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*/
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for (i = 1; i < 4; i++)
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vcpu_set_reg(vcpu, i, lower_32_bits(vcpu_get_reg(vcpu, i)));
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}
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static inline bool kvm_psci_valid_affinity(struct kvm_vcpu *vcpu,
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unsigned long affinity)
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{
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return !(affinity & ~MPIDR_HWID_BITMASK);
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}
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#define AFFINITY_MASK(level) ~((0x1UL << ((level) * MPIDR_LEVEL_BITS)) - 1)
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static inline unsigned long psci_affinity_mask(unsigned long affinity_level)
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{
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if (affinity_level <= 3)
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return MPIDR_HWID_BITMASK & AFFINITY_MASK(affinity_level);
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return 0;
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}
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int kvm_psci_call(struct kvm_vcpu *vcpu);
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#endif /* __KVM_ARM_PSCI_H__ */
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