target/arm/kvm: Export kvm_print_register_name()

We want to use kvm_print_register_name() in machine.c so
let's export the helper and implement a stub when kvm
is not enabled.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260304101625.1962633-4-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/kvm-stub.c

@@ -114,3 +114,8 @@ void arm_gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
 {
     g_assert_not_reached();
 }
+
+char *kvm_print_register_name(uint64_t regidx)
+{
+    g_assert_not_reached();
+}

target/arm/kvm.c

@@ -970,7 +970,7 @@ static gchar *kvm_print_sve_register_name(uint64_t regidx)
     }
 }
 
-static gchar *kvm_print_register_name(uint64_t regidx)
+char *kvm_print_register_name(uint64_t regidx)
 {
         switch ((regidx & KVM_REG_ARM_COPROC_MASK)) {
         case KVM_REG_ARM_CORE:

target/arm/kvm_arm.h

@@ -231,4 +231,13 @@ void arm_cpu_kvm_set_irq(void *arm_cpu, int irq, int level);
 
 void arm_gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3);
 
+/*
+ * kvm_print_register_name:
+ * @regidx: register KVM index
+ *
+ * Returns a human-readable string representing this register
+ * The caller must free the string with g_free().
+ */
+char *kvm_print_register_name(uint64_t regidx);
+
 #endif