[Qemu-arm] [PATCH 1/3] hw/intc/arm_gicv3_common: Give no-migration-shift-bug subsection a needed function

[Peter Maydell]

Currently the migration code incorrectly treats a subsection with
no .needed function pointer as if it was the subsection list
terminator -- it is ignored and so is everything after it.
Work around this by giving vmstate_gicv3_gicd_no_migration_shift_bug
a 'needed' function that always returns true.

Signed-off-by: Peter Maydell <address@hidden>
---
This should go into 3.0 to avoid awkward migration compat problems:
the no-migration-shift-bug subsection is new in 3.0.
---
 hw/intc/arm_gicv3_common.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/intc/arm_gicv3_common.c b/hw/intc/arm_gicv3_common.c
index ff326b374ad..e58bc8b8105 100644
--- a/hw/intc/arm_gicv3_common.c
+++ b/hw/intc/arm_gicv3_common.c
@@ -203,10 +203,16 @@ static int 
gicv3_gicd_no_migration_shift_bug_post_load(void *opaque,
     return 0;
 }
 
+static bool needed_always(void *opaque)
+{
+    return true;
+}
+
 const VMStateDescription vmstate_gicv3_gicd_no_migration_shift_bug = {
     .name = "arm_gicv3/gicd_no_migration_shift_bug",
     .version_id = 1,
     .minimum_version_id = 1,
+    .needed = needed_always,
     .pre_load = gicv3_gicd_no_migration_shift_bug_pre_load,
     .post_load = gicv3_gicd_no_migration_shift_bug_post_load,
     .fields = (VMStateField[]) {
-- 
2.17.1