[PATCH 1/4] igvm: make igvm-cfg object resetable

[Gerd Hoffmann <kraxel@redhat.com>]

Add TYPE_RESETTABLE_INTERFACE to interfaces.  Register callbacks for the
reset phases.  Add trace points for logging and debugging.  No
functional change, that will come in followup patches.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/system/igvm-cfg.h |  2 ++
 backends/igvm-cfg.c       | 36 +++++++++++++++++++++++++++++++++++-
 backends/trace-events     |  5 +++++
 3 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/include/system/igvm-cfg.h b/include/system/igvm-cfg.h
index 944f23a814dd..312f77c092b0 100644
--- a/include/system/igvm-cfg.h
+++ b/include/system/igvm-cfg.h
@@ -13,6 +13,7 @@
 #define QEMU_IGVM_CFG_H
 
 #include "qom/object.h"
+#include "hw/resettable.h"
 
 typedef struct IgvmCfg {
     ObjectClass parent_class;
@@ -23,6 +24,7 @@ typedef struct IgvmCfg {
      *           format.
      */
     char *filename;
+    ResettableState reset_state;
 } IgvmCfg;
 
 typedef struct IgvmCfgClass {
diff --git a/backends/igvm-cfg.c b/backends/igvm-cfg.c
index d00acf351249..4e3ef88ffc27 100644
--- a/backends/igvm-cfg.c
+++ b/backends/igvm-cfg.c
@@ -13,8 +13,11 @@
 
 #include "system/igvm-cfg.h"
 #include "system/igvm.h"
+#include "system/reset.h"
 #include "qom/object_interfaces.h"
 
+#include "trace.h"
+
 static char *get_igvm(Object *obj, Error **errp)
 {
     IgvmCfg *igvm = IGVM_CFG(obj);
@@ -28,24 +31,55 @@ static void set_igvm(Object *obj, const char *value, Error **errp)
     igvm->filename = g_strdup(value);
 }
 
+static ResettableState *igvm_reset_state(Object *obj)
+{
+    IgvmCfg *igvm = IGVM_CFG(obj);
+    return &igvm->reset_state;
+}
+
+static void igvm_reset_enter(Object *obj, ResetType type)
+{
+    trace_igvm_reset_enter(type);
+}
+
+static void igvm_reset_hold(Object *obj, ResetType type)
+{
+    trace_igvm_reset_hold(type);
+}
+
+static void igvm_reset_exit(Object *obj, ResetType type)
+{
+    trace_igvm_reset_exit(type);
+}
+
 OBJECT_DEFINE_TYPE_WITH_INTERFACES(IgvmCfg, igvm_cfg, IGVM_CFG, OBJECT,
-                                   { TYPE_USER_CREATABLE }, { NULL })
+                                   { TYPE_USER_CREATABLE },
+                                   { TYPE_RESETTABLE_INTERFACE },
+                                   { NULL })
 
 static void igvm_cfg_class_init(ObjectClass *oc, const void *data)
 {
     IgvmCfgClass *igvmc = IGVM_CFG_CLASS(oc);
+    ResettableClass *rc = RESETTABLE_CLASS(oc);
 
     object_class_property_add_str(oc, "file", get_igvm, set_igvm);
     object_class_property_set_description(oc, "file",
                                           "Set the IGVM filename to use");
 
     igvmc->process = qigvm_process_file;
+
+    rc->get_state = igvm_reset_state;
+    rc->phases.enter = igvm_reset_enter;
+    rc->phases.hold = igvm_reset_hold;
+    rc->phases.exit = igvm_reset_exit;
 }
 
 static void igvm_cfg_init(Object *obj)
 {
+    qemu_register_resettable(obj);
 }
 
 static void igvm_cfg_finalize(Object *obj)
 {
+    qemu_unregister_resettable(obj);
 }
diff --git a/backends/trace-events b/backends/trace-events
index 56132d3fd22b..45ac46dc2454 100644
--- a/backends/trace-events
+++ b/backends/trace-events
@@ -21,3 +21,8 @@ iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=%d id=%d (%
 iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int ret) " iommufd=%d hwpt=%u enable=%d (%d)"
 iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
 iommufd_backend_invalidate_cache(int iommufd, uint32_t id, uint32_t data_type, uint32_t entry_len, uint32_t entry_num, uint32_t done_num, uint64_t data_ptr, int ret) " iommufd=%d id=%u data_type=%u entry_len=%u entry_num=%u done_num=%u data_ptr=0x%"PRIx64" (%d)"
+
+# igvm-cfg.c
+igvm_reset_enter(int type) "type=%u"
+igvm_reset_hold(int type) "type=%u"
+igvm_reset_exit(int type) "type=%u"
-- 
2.51.1