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hw/sparc64/sun4u_iommu: Fix crash when introspecting sun4u-iommu from the CLI

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QEMU currently crashes when introspecting the sun4u-iommu device from the
command line interface:

 $ ./qemu-system-sparc64 -display none -device sun4u-iommu,help
 qemu-system-sparc64: ../../devel/qemu/system/physmem.c:1401:
  register_multipage: Assertion `num_pages' failed.
 Aborted (core dumped)

There does not seem to be a compelling reason for initializing the
memory regions from the instance_init function, so let's simply move
the code into a realize() function instead to fix this issue.

Reported-by: Markus Armbruster <armbru@redhat.com>
Tested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20260317085839.445178-1-thuth@redhat.com>
This commit is contained in:
Thomas Huth
2026-03-17 09:58:39 +01:00
parent ead7c5b06f
commit d319a3a899
1 changed files with 6 additions and 5 deletions
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11
hw/sparc64/sun4u_iommu.c
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@@ -290,13 +290,14 @@ static void iommu_reset(DeviceState *d)
memset(s->regs, 0, IOMMU_NREGS * sizeof(uint64_t));
}
static void iommu_init(Object *obj)
static void iommu_realize(DeviceState *ds, Error **errp)
{
IOMMUState *s = SUN4U_IOMMU(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
IOMMUState *s = SUN4U_IOMMU(ds);
SysBusDevice *sbd = SYS_BUS_DEVICE(ds);
Object *obj = OBJECT(ds);
memory_region_init_iommu(&s->iommu, sizeof(s->iommu),
TYPE_SUN4U_IOMMU_MEMORY_REGION, OBJECT(s),
TYPE_SUN4U_IOMMU_MEMORY_REGION, obj,
"iommu-sun4u", UINT64_MAX);
address_space_init(&s->iommu_as, MEMORY_REGION(&s->iommu), "iommu-as");
@@ -310,13 +311,13 @@ static void iommu_class_init(ObjectClass *klass, const void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_legacy_reset(dc, iommu_reset);
dc->realize = iommu_realize;
}
static const TypeInfo iommu_info = {
.name = TYPE_SUN4U_IOMMU,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(IOMMUState),
.instance_init = iommu_init,
.class_init = iommu_class_init,
};