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pc: add SMM property

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The property can take values on, off or auto.  The default is "off"
for KVM and pre-2.4 machines, otherwise "auto" (which makes it
available on TCG or on new-enough kernels).

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-06-18 18:30:52 +02:00
parent fba72476c6
commit 355023f201
7 changed files with 76 additions and 2 deletions
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51
hw/i386/pc.c
View file

@ -1768,6 +1768,48 @@ static void pc_machine_set_vmport(Object *obj, Visitor *v, void *opaque,
visit_type_OnOffAuto(v, &pcms->vmport, name, errp);
}
bool pc_machine_is_smm_enabled(PCMachineState *pcms)
{
bool smm_available = false;
if (pcms->smm == ON_OFF_AUTO_OFF) {
return false;
}
if (tcg_enabled() || qtest_enabled()) {
smm_available = true;
} else if (kvm_enabled()) {
smm_available = kvm_has_smm();
}
if (smm_available) {
return true;
}
if (pcms->smm == ON_OFF_AUTO_ON) {
error_report("System Management Mode not supported by this hypervisor.");
exit(1);
}
return false;
}
static void pc_machine_get_smm(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
OnOffAuto smm = pcms->smm;
visit_type_OnOffAuto(v, &smm, name, errp);
}
static void pc_machine_set_smm(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
visit_type_OnOffAuto(v, &pcms->smm, name, errp);
}
static bool pc_machine_get_aligned_dimm(Object *obj, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
@ -1792,6 +1834,15 @@ static void pc_machine_initfn(Object *obj)
"Maximum ram below the 4G boundary (32bit boundary)",
NULL);
pcms->smm = ON_OFF_AUTO_AUTO;
object_property_add(obj, PC_MACHINE_SMM, "OnOffAuto",
pc_machine_get_smm,
pc_machine_set_smm,
NULL, NULL, NULL);
object_property_set_description(obj, PC_MACHINE_SMM,
"Enable SMM (pc & q35)",
NULL);
pcms->vmport = ON_OFF_AUTO_AUTO;
object_property_add(obj, PC_MACHINE_VMPORT, "OnOffAuto",
pc_machine_get_vmport,