[PATCH 01/23] accel: introduce KVMAccelClass and KVMCPUOps

["Alex Bennée" <alex.bennee@linaro.org>]

Introduce a new class derived from AccelCPUClass. It only exists to to
contain the new KVMCPUOps which will allow for a QOM-ified access to
what was previously kvm_arch_foo direct linking. This anticipates a
world where we have a KVM interface capable of launching multiple
architectures.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 include/accel/kvm/cpu-ops.h | 53 +++++++++++++++++++++++++++++++++++++
 accel/kvm/kvm-accel-ops.c   |  9 +++++++
 2 files changed, 62 insertions(+)
 create mode 100644 include/accel/kvm/cpu-ops.h

diff --git a/include/accel/kvm/cpu-ops.h b/include/accel/kvm/cpu-ops.h
new file mode 100644
index 00000000000..662d0c553c7
--- /dev/null
+++ b/include/accel/kvm/cpu-ops.h
@@ -0,0 +1,53 @@
+/*
+ * KVM CPU-specific operations
+ *
+ * Copyright 2026 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef ACCEL_KVM_CPU_OPS_H
+#define ACCEL_KVM_CPU_OPS_H
+
+#include "qom/object.h"
+#include "hw/core/cpu.h"
+#include "accel/accel-cpu-target.h"
+
+/**
+ * struct KVMCPUOps - Target-specific per-vCPU operations for KVM
+ */
+typedef struct KVMCPUOps {
+} KVMCPUOps;
+
+#define TYPE_KVM_ACCEL_CPU "kvm-accel-cpu"
+
+/**
+ * struct KVMAccelCPUClass - KVM-specific accelerator CPU class
+ *
+ * @parent_class: The parent #AccelCPUClass
+ */
+typedef struct KVMAccelCPUClass {
+    AccelCPUClass parent_class;
+
+    const KVMCPUOps *cpu_ops;
+} KVMAccelCPUClass;
+
+DECLARE_CLASS_CHECKERS(KVMAccelCPUClass, KVM_ACCEL_CPU, TYPE_KVM_ACCEL_CPU)
+
+/**
+ * kvm_get_cpu_ops - Retrieve the KVMCPUOps table for a CPU
+ * @cpu: The #CPUState
+ *
+ * Returns: A pointer to the active #KVMCPUOps, or NULL if the CPU class does
+ *          not have an attached KVM accelerator class.
+ */
+static inline const KVMCPUOps *kvm_get_cpu_ops(const CPUState *cpu)
+{
+    if (cpu->cc->accel_cpu) {
+        KVMAccelCPUClass *kacc = KVM_ACCEL_CPU_CLASS(cpu->cc->accel_cpu);
+        return kacc->cpu_ops;
+    }
+    return NULL;
+}
+
+#endif /* ACCEL_KVM_CPU_OPS_H */
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index 47244d33f7d..445d7d7f545 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -18,6 +18,7 @@
 #include "qemu/main-loop.h"
 #include "exec/cpu-common.h"
 #include "accel/accel-cpu-ops.h"
+#include "accel/kvm/cpu-ops.h"
 #include "system/kvm.h"
 #include "system/kvm_int.h"
 #include "system/runstate.h"
@@ -121,8 +122,16 @@ static const TypeInfo kvm_accel_ops_type = {
     .abstract = true,
 };
 
+static const TypeInfo kvm_accel_cpu_type = {
+    .name = TYPE_KVM_ACCEL_CPU,
+    .parent = TYPE_ACCEL_CPU,
+    .class_size = sizeof(KVMAccelCPUClass),
+    .abstract = true,
+};
+
 static void kvm_accel_ops_register_types(void)
 {
     type_register_static(&kvm_accel_ops_type);
+    type_register_static(&kvm_accel_cpu_type);
 }
 type_init(kvm_accel_ops_register_types);
-- 
2.47.3