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>

---

v2 -> v3:
- added "The caller must free the string with g_free()."

v1 -> v2:
- add doc comment
- no code after g_assert_not_reached()
- use char * instead of gchar
---
 target/arm/kvm_arm.h  | 9 +++++++++
 target/arm/kvm-stub.c | 5 +++++
 target/arm/kvm.c      | 2 +-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
index 82ac2aae464..e7c40fb003e 100644
--- a/target/arm/kvm_arm.h
+++ b/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
diff --git a/target/arm/kvm-stub.c b/target/arm/kvm-stub.c
index 169ef5f2063..88cbe8d85c4 100644
--- a/target/arm/kvm-stub.c
+++ b/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();
+}
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 555083e7aaf..11f6f2dff09 100644
--- a/target/arm/kvm.c
+++ b/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:
-- 
2.53.0