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hw/s390x: Remove the obsolete hpage_1m_allowed switch

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The s390-ccw-virtio-3.0 machine was the last one that used the
hpage_1m_allowed switch. Since we removed this machine type, we
can now remove the switch and the related code, too. This allows
us to get rid of the get_machine_class() hack and the big fat
warning comment there.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250506062148.306084-8-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2025-05-06 08:21:46 +02:00
parent 240e7c36e7
commit bbe6f504ef
3 changed files with 0 additions and 45 deletions
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35
hw/s390x/s390-virtio-ccw.c
View file

@ -748,39 +748,6 @@ static inline void machine_set_dea_key_wrap(Object *obj, bool value,
ms->dea_key_wrap = value;
}
static S390CcwMachineClass *current_mc;
/*
* Get the class of the s390-ccw-virtio machine that is currently in use.
* Note: libvirt is using the "none" machine to probe for the features of the
* host CPU, so in case this is called with the "none" machine, the function
* returns the TYPE_S390_CCW_MACHINE base class. In this base class, all the
* various "*_allowed" variables are enabled, so that the *_allowed() wrappers
* below return the correct default value for the "none" machine.
*
* Attention! Do *not* add additional new wrappers for CPU features via this
* mechanism anymore. CPU features should be handled via the CPU models,
* i.e. checking with s390_has_feat() should be sufficient.
*/
static S390CcwMachineClass *get_machine_class(void)
{
if (unlikely(!current_mc)) {
/*
* No s390 ccw machine was instantiated, we are likely to
* be called for the 'none' machine. The properties will
* have their after-initialization values.
*/
current_mc = S390_CCW_MACHINE_CLASS(
object_class_by_name(TYPE_S390_CCW_MACHINE));
}
return current_mc;
}
bool hpage_1m_allowed(void)
{
return get_machine_class()->hpage_1m_allowed;
}
static void machine_get_loadparm(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
@ -814,7 +781,6 @@ static void ccw_machine_class_init(ObjectClass *oc, const void *data)
S390CcwMachineClass *s390mc = S390_CCW_MACHINE_CLASS(mc);
DumpSKeysInterface *dsi = DUMP_SKEYS_INTERFACE_CLASS(oc);
s390mc->hpage_1m_allowed = true;
s390mc->max_threads = 1;
mc->reset = s390_machine_reset;
mc->block_default_type = IF_VIRTIO;
@ -888,7 +854,6 @@ static const TypeInfo ccw_machine_info = {
#define DEFINE_CCW_MACHINE_IMPL(latest, ...) \
static void MACHINE_VER_SYM(mach_init, ccw, __VA_ARGS__)(MachineState *mach) \
{ \
current_mc = S390_CCW_MACHINE_CLASS(MACHINE_GET_CLASS(mach)); \
MACHINE_VER_SYM(instance_options, ccw, __VA_ARGS__)(mach); \
ccw_init(mach); \
} \

4
include/hw/s390x/s390-virtio-ccw.h
View file

@ -53,11 +53,7 @@ struct S390CcwMachineClass {
MachineClass parent_class;
/*< public >*/
bool hpage_1m_allowed;
int max_threads;
};
/* 1M huge page mappings allowed by the machine */
bool hpage_1m_allowed(void);
#endif

6
target/s390x/kvm/kvm.c
View file

@ -298,12 +298,6 @@ void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
return;
}
if (!hpage_1m_allowed()) {
error_setg(errp, "This QEMU machine does not support huge page "
"mappings");
return;
}
if (pagesize != 1 * MiB) {
error_setg(errp, "Memory backing with 2G pages was specified, "
"but KVM does not support this memory backing");