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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /include/kvm/arm_psci.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/kvm/arm_psci.h')
-rw-r--r--include/kvm/arm_psci.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/kvm/arm_psci.h b/include/kvm/arm_psci.h
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+++ b/include/kvm/arm_psci.h
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+/* 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__ */