On 31/05/2023 22:10, Bernhard Beschow wrote:
The modern, declarative way to set up VM state handling is to assign to
DeviceClass::vmsd attribute.
There shouldn't be any change in behavior since dc->vmsd causes
vmstate_register_with_alias_id() to be called on the instance during
the instance init phase. vmstate_register() was also called during the
instance init phase which forwards to vmstate_register_with_alias_id()
internally. Checking the migration schema before and after this patch confirms:
before:
qemu-system-x86_64 -S
qemu > migrate -d exec:cat>before.mig
after:
qemu-system-x86_64 -S
qemu > migrate -d exec:cat>after.mig
analyze-migration.py -d desc -f before.mig > before.json
analyze-migration.py -d desc -f after.mig > after.json
diff before.json after.json
-> empty
Signed-off-by: Bernhard Beschow <shen...@gmail.com>
---
hw/ide/piix.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 47e0b474c3..151f206046 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -28,7 +28,6 @@
*/
#include "qemu/osdep.h"
-#include "migration/vmstate.h"
#include "qapi/error.h"
#include "hw/pci/pci.h"
#include "hw/ide/piix.h"
@@ -159,8 +158,6 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error
**errp)
bmdma_setup_bar(d);
pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
- vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_pci, d);
-
for (unsigned i = 0; i < 2; i++) {
if (!pci_piix_init_bus(d, i, errp)) {
return;
@@ -186,6 +183,7 @@ static void piix3_ide_class_init(ObjectClass *klass, void
*data)
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->reset = piix_ide_reset;
+ dc->vmsd = &vmstate_ide_pci;
k->realize = pci_piix_ide_realize;
k->exit = pci_piix_ide_exitfn;
k->vendor_id = PCI_VENDOR_ID_INTEL;
@@ -208,6 +206,7 @@ static void piix4_ide_class_init(ObjectClass *klass, void
*data)
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->reset = piix_ide_reset;
+ dc->vmsd = &vmstate_ide_pci;
k->realize = pci_piix_ide_realize;
k->exit = pci_piix_ide_exitfn;
k->vendor_id = PCI_VENDOR_ID_INTEL;
Reviewed-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
ATB,
Mark.
