Merge remote-tracking branch 'remotes/juanquintela/tags/migration-pull-pull-request' into staging

Migration pull request

# gpg: Signature made Mon 20 Jan 2020 10:29:53 GMT
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration-pull-pull-request: (29 commits)
  multifd: Be consistent about using uint64_t
  migration: Support QLIST migration
  apic: Use 32bit APIC ID for migration instance ID
  migration: Change SaveStateEntry.instance_id into uint32_t
  migration: Define VMSTATE_INSTANCE_ID_ANY
  Bug #1829242 correction.
  migration/multifd: fix destroyed mutex access in terminating multifd threads
  migration/multifd: fix nullptr access in terminating multifd threads
  migration/multifd: not use multifd during postcopy
  migration/multifd: clean pages after filling packet
  migration/postcopy: enable compress during postcopy
  migration/postcopy: enable random order target page arrival
  migration/postcopy: set all_zero to true on the first target page
  migration/postcopy: count target page number to decide the place_needed
  migration/postcopy: wait for decompress thread in precopy
  migration/postcopy: reduce memset when it is zero page and matches_target_page_size
  migration/ram: Yield periodically to the main loop
  migration: savevm_state_handler_insert: constant-time element insertion
  migration: add savevm_state_handler_remove()
  misc: use QEMU_IS_ALIGNED
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 64 insertions, 2 deletions

diff --git a/include/migration/register.h b/include/migration/register.h
index 00c38eb..c1dcff0 100644
--- a/include/migration/register.h
+++ b/include/migration/register.h
@@ -71,7 +71,7 @@ typedef struct SaveVMHandlers {
 } SaveVMHandlers;
 
 int register_savevm_live(const char *idstr,
-                         int instance_id,
+                         uint32_t instance_id,
                          int version_id,
                          const SaveVMHandlers *ops,
                          void *opaque);
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 4aef72c..3066763 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -229,6 +229,7 @@ extern const VMStateInfo vmstate_info_tmp;
 extern const VMStateInfo vmstate_info_bitmap;
 extern const VMStateInfo vmstate_info_qtailq;
 extern const VMStateInfo vmstate_info_gtree;
+extern const VMStateInfo vmstate_info_qlist;
 
 #define type_check_2darray(t1,t2,n,m) ((t1(*)[n][m])0 - (t2*)0)
 /*
@@ -798,6 +799,26 @@ extern const VMStateInfo vmstate_info_gtree;
     .offset       = offsetof(_state, _field),                                  \
 }
 
+/*
+ * For migrating a QLIST
+ * Target QLIST needs be properly initialized.
+ * _type: type of QLIST element
+ * _next: name of QLIST_ENTRY entry field in QLIST element
+ * _vmsd: VMSD for QLIST element
+ * size: size of QLIST element
+ * start: offset of QLIST_ENTRY in QTAILQ element
+ */
+#define VMSTATE_QLIST_V(_field, _state, _version, _vmsd, _type, _next)  \
+{                                                                        \
+    .name         = (stringify(_field)),                                 \
+    .version_id   = (_version),                                          \
+    .vmsd         = &(_vmsd),                                            \
+    .size         = sizeof(_type),                                       \
+    .info         = &vmstate_info_qlist,                                 \
+    .offset       = offsetof(_state, _field),                            \
+    .start        = offsetof(_type, _next),                              \
+}
+
 /* _f : field name
    _f_n : num of elements field_name
    _n : num of elements
@@ -1157,8 +1178,10 @@ int vmstate_save_state_v(QEMUFile *f, const VMStateDescription *vmsd,
 
 bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque);
 
+#define  VMSTATE_INSTANCE_ID_ANY  -1
+
 /* Returns: 0 on success, -1 on failure */
-int vmstate_register_with_alias_id(VMStateIf *obj, int instance_id,
+int vmstate_register_with_alias_id(VMStateIf *obj, uint32_t instance_id,
                                    const VMStateDescription *vmsd,
                                    void *base, int alias_id,
                                    int required_for_version,
diff --git a/include/qemu/queue.h b/include/qemu/queue.h
index 4764d93..4d4554a 100644
--- a/include/qemu/queue.h
+++ b/include/qemu/queue.h
@@ -501,4 +501,43 @@ union {                                                                 \
         QTAILQ_RAW_TQH_CIRC(head)->tql_prev = QTAILQ_RAW_TQE_CIRC(elm, entry);  \
 } while (/*CONSTCOND*/0)
 
+#define QLIST_RAW_FIRST(head)                                                  \
+        field_at_offset(head, 0, void *)
+
+#define QLIST_RAW_NEXT(elm, entry)                                             \
+        field_at_offset(elm, entry, void *)
+
+#define QLIST_RAW_PREVIOUS(elm, entry)                                         \
+        field_at_offset(elm, entry + sizeof(void *), void *)
+
+#define QLIST_RAW_FOREACH(elm, head, entry)                                    \
+        for ((elm) = *QLIST_RAW_FIRST(head);                                   \
+             (elm);                                                            \
+             (elm) = *QLIST_RAW_NEXT(elm, entry))
+
+#define QLIST_RAW_INSERT_HEAD(head, elm, entry) do {                           \
+        void *first = *QLIST_RAW_FIRST(head);                                  \
+        *QLIST_RAW_FIRST(head) = elm;                                          \
+        *QLIST_RAW_PREVIOUS(elm, entry) = QLIST_RAW_FIRST(head);               \
+        if (first) {                                                           \
+            *QLIST_RAW_NEXT(elm, entry) = first;                               \
+            *QLIST_RAW_PREVIOUS(first, entry) = QLIST_RAW_NEXT(elm, entry);    \
+        } else {                                                               \
+            *QLIST_RAW_NEXT(elm, entry) = NULL;                                \
+        }                                                                      \
+} while (0)
+
+#define QLIST_RAW_REVERSE(head, elm, entry) do {                               \
+        void *iter = *QLIST_RAW_FIRST(head), *prev = NULL, *next;              \
+        while (iter) {                                                         \
+            next = *QLIST_RAW_NEXT(iter, entry);                               \
+            *QLIST_RAW_PREVIOUS(iter, entry) = QLIST_RAW_NEXT(next, entry);    \
+            *QLIST_RAW_NEXT(iter, entry) = prev;                               \
+            prev = iter;                                                       \
+            iter = next;                                                       \
+        }                                                                      \
+        *QLIST_RAW_FIRST(head) = prev;                                         \
+        *QLIST_RAW_PREVIOUS(prev, entry) = QLIST_RAW_FIRST(head);              \
+} while (0)
+
 #endif /* QEMU_SYS_QUEUE_H */