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Common hypercall firmware register handing is currently employed by psci.c. Since the upcoming patches add more of these registers, it's better to move the generic handling to hypercall.c for a cleaner presentation. While we are at it, collect all the firmware registers under fw_reg_ids[] to help implement kvm_arm_get_fw_num_regs() and kvm_arm_copy_fw_reg_indices() in a generic way. Also, define KVM_REG_FEATURE_LEVEL_MASK using a GENMASK instead. No functional change intended. Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> Reviewed-by: Oliver Upton <oupton@google.com> Reviewed-by: Gavin Shan <gshan@redhat.com> [maz: fixed KVM_REG_FEATURE_LEVEL_MASK] Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220502233853.1233742-2-rananta@google.com
43 lines
1.1 KiB
C
43 lines
1.1 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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int kvm_psci_call(struct kvm_vcpu *vcpu);
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#endif /* __KVM_ARM_PSCI_H__ */
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