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hw/arm/integratorcp: Don't do things that could be fatal in the instance_init 

An instance_init function must not fail - and might be called multiple times,
e.g. during device introspection with the 'device-list-properties' QMP
command. Since the integratorcm device ignores this rule, QEMU currently
aborts in this case (though it really should not):

echo "{'execute':'qmp_capabilities'}"\
     "{'execute':'device-list-properties',"\
     "'arguments':{'typename':'integrator_core'}}" \
     | arm-softmmu/qemu-system-arm -M integratorcp,accel=qtest -qmp stdio
{"QMP": {"version": {"qemu": {"micro": 91, "minor": 11, "major": 2},
 "package": "build-all"}, "capabilities": []}}
{"return": {}}
RAMBlock "integrator.flash" already registered, abort!
Aborted (core dumped)

Move the problematic code to the realize() function instead to fix this
problem.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1522906473-11252-1-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Thomas Huth 2018-04-10 13:02:24 +01:00 committed by Peter Maydell
parent c39770cd63
commit 8720daad47
1 changed files with 15 additions and 8 deletions
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23
hw/arm/integratorcp.c
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@ -266,7 +266,6 @@ static const MemoryRegionOps integratorcm_ops = {
static void integratorcm_init(Object *obj)
{
IntegratorCMState *s = INTEGRATOR_CM(obj);
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
s->cm_osc = 0x01000048;
/* ??? What should the high bits of this value be? */
@ -276,20 +275,28 @@ static void integratorcm_init(Object *obj)
s->cm_init = 0x00000112;
s->cm_refcnt_offset = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 24,
1000);
memory_region_init_ram(&s->flash, obj, "integrator.flash", 0x100000,
&error_fatal);
memory_region_init_io(&s->iomem, obj, &integratorcm_ops, s,
"integratorcm", 0x00800000);
sysbus_init_mmio(dev, &s->iomem);
integratorcm_do_remap(s);
/* ??? Save/restore. */
}
static void integratorcm_realize(DeviceState *d, Error **errp)
{
IntegratorCMState *s = INTEGRATOR_CM(d);
SysBusDevice *dev = SYS_BUS_DEVICE(d);
Error *local_err = NULL;
memory_region_init_ram(&s->flash, OBJECT(d), "integrator.flash", 0x100000,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
memory_region_init_io(&s->iomem, OBJECT(d), &integratorcm_ops, s,
"integratorcm", 0x00800000);
sysbus_init_mmio(dev, &s->iomem);
integratorcm_do_remap(s);
if (s->memsz >= 256) {
integrator_spd[31] = 64;