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hw/core/qdev-properties-system: Allow the 'slew' policy only on x86 

The 'slew' tick policy is currently enforced to be only available on
x86 via some "#ifdef TARGET_I386" statements in mc146818rtc.c. We
want to get rid of those #ifdefs, so we need a different way of
checking whether the policy is allowed or not. Using the setter
function in hw/core/qdev-properties-system.c seems to be a good
place, so let's add a check here.

Suggested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20230110095351.611724-3-thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Thomas Huth 2023-01-10 10:53:49 +01:00 committed by Philippe Mathieu-Daudé
parent 2b85e0cda4
commit aae167211f
1 changed files with 27 additions and 1 deletions
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28
hw/core/qdev-properties-system.c
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@ -33,6 +33,7 @@
#include "net/net.h"
#include "hw/pci/pci.h"
#include "hw/pci/pcie.h"
#include "hw/i386/x86.h"
#include "util/block-helpers.h"
static bool check_prop_still_unset(Object *obj, const char *name,
@ -558,13 +559,38 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
/* --- lost tick policy --- */
static void qdev_propinfo_set_losttickpolicy(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
Property *prop = opaque;
int *ptr = object_field_prop_ptr(obj, prop);
int value;
if (!visit_type_enum(v, name, &value, prop->info->enum_table, errp)) {
return;
}
if (value == LOST_TICK_POLICY_SLEW) {
MachineState *ms = MACHINE(qdev_get_machine());
if (!object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE)) {
error_setg(errp,
"the 'slew' policy is only available for x86 machines");
return;
}
}
*ptr = value;
}
QEMU_BUILD_BUG_ON(sizeof(LostTickPolicy) != sizeof(int));
const PropertyInfo qdev_prop_losttickpolicy = {
.name = "LostTickPolicy",
.enum_table = &LostTickPolicy_lookup,
.get = qdev_propinfo_get_enum,
.set = qdev_propinfo_set_enum,
.set = qdev_propinfo_set_losttickpolicy,
.set_default_value = qdev_propinfo_set_default_value_enum,
};