[PATCH v1 7/9] plugins: add API to return a name for a IO device

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

This may well end up being anonymous but it should always be unique.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 include/qemu/qemu-plugin.h |  5 +++++
 plugins/api.c              | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index bab8b0d4b3a..43c6a9e857f 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -335,6 +335,11 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
 bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr);
 uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr);
 
+/*
+ * Returns a string representing the device. Plugin must free() it
+ */
+char * qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *haddr);
+
 typedef void
 (*qemu_plugin_vcpu_mem_cb_t)(unsigned int vcpu_index,
                              qemu_plugin_meminfo_t info, uint64_t vaddr,
diff --git a/plugins/api.c b/plugins/api.c
index bbdc5a4eb46..3c73de8c1c2 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -303,6 +303,24 @@ uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr
     return 0;
 }
 
+char * qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *haddr)
+{
+#ifdef CONFIG_SOFTMMU
+    if (haddr && haddr->is_io) {
+        MemoryRegionSection *mrs = haddr->v.io.section;
+        if (!mrs->mr->name) {
+            return g_strdup_printf("anon%08lx", 0xffffffff & (uintptr_t) mrs->mr);
+        } else {
+            return g_strdup(mrs->mr->name);
+        }
+    } else {
+        return g_strdup("RAM");
+    }
+#else
+    return g_strdup("Invalid");
+#endif
+}
+
 /*
  * Queries to the number and potential maximum number of vCPUs there
  * will be. This helps the plugin dimension per-vcpu arrays.
-- 
2.20.1