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[PATCH] migration: Remove load_state_old and minimum_version_id_old
From: |
Peter Maydell |
Subject: |
[PATCH] migration: Remove load_state_old and minimum_version_id_old |
Date: |
Tue, 15 Feb 2022 17:57:05 +0000 |
There are no longer any VMStateDescription structs in the tree which
use the load_state_old support for custom handling of incoming
migration from very old QEMU. Remove the mechanism entirely.
This includes removing one stray useless setting of
minimum_version_id_old in a VMStateDescription with no load_state_old
function, which crept in after the global weeding-out of them in
commit 17e313406126.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
docs/devel/migration.rst | 10 ++--------
include/migration/vmstate.h | 2 --
hw/ssi/xlnx-versal-ospi.c | 1 -
migration/vmstate.c | 6 ------
4 files changed, 2 insertions(+), 17 deletions(-)
diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst
index 24012534827..3e9656d8e0b 100644
--- a/docs/devel/migration.rst
+++ b/docs/devel/migration.rst
@@ -389,19 +389,13 @@ Each version is associated with a series of fields saved.
The ``save_state`` al
the state as the newer version. But ``load_state`` sometimes is able to
load state from an older version.
-You can see that there are several version fields:
+You can see that there are two version fields:
- ``version_id``: the maximum version_id supported by VMState for that device.
- ``minimum_version_id``: the minimum version_id that VMState is able to
understand
for that device.
-- ``minimum_version_id_old``: For devices that were not able to port to
vmstate, we can
- assign a function that knows how to read this old state. This field is
- ignored if there is no ``load_state_old`` handler.
-VMState is able to read versions from minimum_version_id to
-version_id. And the function ``load_state_old()`` (if present) is able to
-load state from minimum_version_id_old to minimum_version_id. This
-function is deprecated and will be removed when no more users are left.
+VMState is able to read versions from minimum_version_id to version_id.
There are *_V* forms of many ``VMSTATE_`` macros to load fields for version
dependent fields,
e.g.
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 017c03675ca..ad24aa19345 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -181,9 +181,7 @@ struct VMStateDescription {
int unmigratable;
int version_id;
int minimum_version_id;
- int minimum_version_id_old;
MigrationPriority priority;
- LoadStateHandler *load_state_old;
int (*pre_load)(void *opaque);
int (*post_load)(void *opaque, int version_id);
int (*pre_save)(void *opaque);
diff --git a/hw/ssi/xlnx-versal-ospi.c b/hw/ssi/xlnx-versal-ospi.c
index 7ecd148fdf3..c762e0b3679 100644
--- a/hw/ssi/xlnx-versal-ospi.c
+++ b/hw/ssi/xlnx-versal-ospi.c
@@ -1800,7 +1800,6 @@ static const VMStateDescription vmstate_xlnx_versal_ospi
= {
.name = TYPE_XILINX_VERSAL_OSPI,
.version_id = 1,
.minimum_version_id = 1,
- .minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_FIFO8(rx_fifo, XlnxVersalOspi),
VMSTATE_FIFO8(tx_fifo, XlnxVersalOspi),
diff --git a/migration/vmstate.c b/migration/vmstate.c
index 05f87cdddc5..36ae8b9e191 100644
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -90,12 +90,6 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription
*vmsd,
return -EINVAL;
}
if (version_id < vmsd->minimum_version_id) {
- if (vmsd->load_state_old &&
- version_id >= vmsd->minimum_version_id_old) {
- ret = vmsd->load_state_old(f, opaque, version_id);
- trace_vmstate_load_state_end(vmsd->name, "old path", ret);
- return ret;
- }
error_report("%s: incoming version_id %d is too old "
"for local minimum version_id %d",
vmsd->name, version_id, vmsd->minimum_version_id);
--
2.25.1
- [PATCH] migration: Remove load_state_old and minimum_version_id_old,
Peter Maydell <=