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ivshmem: migrate with VMStateDescription 

load_state_old() is used to keep compatibility with version 0.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Marc-André Lureau 2015-06-18 14:05:46 +02:00
parent e309366337
commit 1f8552df2c
1 changed files with 89 additions and 53 deletions
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142
hw/misc/ivshmem.c
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@ -651,56 +651,6 @@ static int ivshmem_setup_msi(IVShmemState * s)
return 0;
}
static void ivshmem_save(QEMUFile* f, void *opaque)
{
IVShmemState *proxy = opaque;
PCIDevice *pci_dev = PCI_DEVICE(proxy);
IVSHMEM_DPRINTF("ivshmem_save\n");
pci_device_save(pci_dev, f);
if (ivshmem_has_feature(proxy, IVSHMEM_MSI)) {
msix_save(pci_dev, f);
} else {
qemu_put_be32(f, proxy->intrstatus);
qemu_put_be32(f, proxy->intrmask);
}
}
static int ivshmem_load(QEMUFile* f, void *opaque, int version_id)
{
IVSHMEM_DPRINTF("ivshmem_load\n");
IVShmemState *proxy = opaque;
PCIDevice *pci_dev = PCI_DEVICE(proxy);
int ret;
if (version_id > 0) {
return -EINVAL;
}
if (proxy->role_val == IVSHMEM_PEER) {
error_report("'peer' devices are not migratable");
return -EINVAL;
}
ret = pci_device_load(pci_dev, f);
if (ret) {
return ret;
}
if (ivshmem_has_feature(proxy, IVSHMEM_MSI)) {
msix_load(pci_dev, f);
ivshmem_use_msix(proxy);
} else {
proxy->intrstatus = qemu_get_be32(f);
proxy->intrmask = qemu_get_be32(f);
}
return 0;
}
static void ivshmem_write_config(PCIDevice *pci_dev, uint32_t address,
uint32_t val, int len)
{
@ -726,8 +676,7 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
}
fifo8_create(&s->incoming_fifo, sizeof(long));
register_savevm(DEVICE(dev), "ivshmem", 0, 0, ivshmem_save, ivshmem_load,
dev);
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
@ -853,10 +802,96 @@ static void pci_ivshmem_exit(PCIDevice *dev)
memory_region_del_subregion(&s->bar, &s->ivshmem);
vmstate_unregister_ram(&s->ivshmem, DEVICE(dev));
unregister_savevm(DEVICE(dev), "ivshmem", s);
fifo8_destroy(&s->incoming_fifo);
}
static bool test_msix(void *opaque, int version_id)
{
IVShmemState *s = opaque;
return ivshmem_has_feature(s, IVSHMEM_MSI);
}
static bool test_no_msix(void *opaque, int version_id)
{
return !test_msix(opaque, version_id);
}
static int ivshmem_pre_load(void *opaque)
{
IVShmemState *s = opaque;
if (s->role_val == IVSHMEM_PEER) {
error_report("'peer' devices are not migratable");
return -EINVAL;
}
return 0;
}
static int ivshmem_post_load(void *opaque, int version_id)
{
IVShmemState *s = opaque;
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
ivshmem_use_msix(s);
}
return 0;
}
static int ivshmem_load_old(QEMUFile *f, void *opaque, int version_id)
{
IVShmemState *s = opaque;
PCIDevice *pdev = PCI_DEVICE(s);
int ret;
IVSHMEM_DPRINTF("ivshmem_load_old\n");
if (version_id != 0) {
return -EINVAL;
}
if (s->role_val == IVSHMEM_PEER) {
error_report("'peer' devices are not migratable");
return -EINVAL;
}
ret = pci_device_load(pdev, f);
if (ret) {
return ret;
}
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
msix_load(pdev, f);
ivshmem_use_msix(s);
} else {
s->intrstatus = qemu_get_be32(f);
s->intrmask = qemu_get_be32(f);
}
return 0;
}
static const VMStateDescription ivshmem_vmsd = {
.name = "ivshmem",
.version_id = 1,
.minimum_version_id = 1,
.pre_load = ivshmem_pre_load,
.post_load = ivshmem_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, IVShmemState),
VMSTATE_MSIX_TEST(parent_obj, IVShmemState, test_msix),
VMSTATE_UINT32_TEST(intrstatus, IVShmemState, test_no_msix),
VMSTATE_UINT32_TEST(intrmask, IVShmemState, test_no_msix),
VMSTATE_END_OF_LIST()
},
.load_state_old = ivshmem_load_old,
.minimum_version_id_old = 0
};
static Property ivshmem_properties[] = {
DEFINE_PROP_CHR("chardev", IVShmemState, server_chr),
DEFINE_PROP_STRING("size", IVShmemState, sizearg),
@ -882,6 +917,7 @@ static void ivshmem_class_init(ObjectClass *klass, void *data)
k->class_id = PCI_CLASS_MEMORY_RAM;
dc->reset = ivshmem_reset;
dc->props = ivshmem_properties;
dc->vmsd = &ivshmem_vmsd;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}