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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773737930; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Nvo8ZxYpvNESWwYgT308QCI89GUADvG+DHcdOxlYT34=; b=H3jYmGZvBK1a+TbAODUe5CxcaOnl/bL8GkVj9XIH5z06tQotKVjivYKHCt1N/Rtcl2ziYa 4Kd9Tk9MYaO+B1qordYGdZN3BnYV9cx32YdrDRd8/SKTmNDeNha/zDmwBdUHay0wp4vqjo F7vA96AkANerngBeWaneLQfOZVx5qqs= X-MC-Unique: _BfSUI-tNSmIhO-_mbupAQ-1 X-Mimecast-MFC-AGG-ID: _BfSUI-tNSmIhO-_mbupAQ_1773737925 From: Thomas Huth To: Mark Cave-Ayland , qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, Markus Armbruster , Artyom Tarasenko Subject: [PATCH] hw/sparc64/sun4u_iommu: Fix crash when introspecting sun4u-iommu from the CLI Date: Tue, 17 Mar 2026 09:58:39 +0100 Message-ID: <20260317085839.445178-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Thomas Huth 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. Signed-off-by: Thomas Huth Reported-by: Markus Armbruster Tested-by: Markus Armbruster --- hw/sparc64/sun4u_iommu.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/hw/sparc64/sun4u_iommu.c b/hw/sparc64/sun4u_iommu.c index 0188ce35d29..fe9d47b822f 100644 --- a/hw/sparc64/sun4u_iommu.c +++ b/hw/sparc64/sun4u_iommu.c @@ -290,13 +290,14 @@ static void iommu_reset(DeviceState *d) memset(s->regs, 0, IOMMU_NREGS * sizeof(uint64_t)); } =20 -static void iommu_init(Object *obj) +static void iommu_realize(DeviceState *ds, Error **errp) { - IOMMUState *s =3D SUN4U_IOMMU(obj); - SysBusDevice *sbd =3D SYS_BUS_DEVICE(obj); + IOMMUState *s =3D SUN4U_IOMMU(ds); + SysBusDevice *sbd =3D SYS_BUS_DEVICE(ds); + Object *obj =3D OBJECT(ds); =20 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"); =20 @@ -310,13 +311,13 @@ static void iommu_class_init(ObjectClass *klass, cons= t void *data) DeviceClass *dc =3D DEVICE_CLASS(klass); =20 device_class_set_legacy_reset(dc, iommu_reset); + dc->realize =3D iommu_realize; } =20 static const TypeInfo iommu_info =3D { .name =3D TYPE_SUN4U_IOMMU, .parent =3D TYPE_SYS_BUS_DEVICE, .instance_size =3D sizeof(IOMMUState), - .instance_init =3D iommu_init, .class_init =3D iommu_class_init, }; =20 --=20 2.53.0