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kvm: don't register smram_listener when smm is off

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If the user set disable smm by '-machine smm=off', we
should not register smram_listener so that we can
avoid waster memory in kvm since the added sencond
address space.

Meanwhile we should assign value of the global kvm_state
before invoking the kvm_arch_init(), because
pc_machine_is_smm_enabled() may use it by kvm_has_mm().

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Message-Id: <1496316915-121196-1-git-send-email-arei.gonglei@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gonglei 2017-06-01 19:35:15 +08:00 • committed by Paolo Bonzini
parent 6bdcc018a6
commit d870cfdea5
2 changed files with 5 additions and 3 deletions
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4
target/i386/kvm.c
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@ -1255,7 +1255,9 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
}
}
if (kvm_check_extension(s, KVM_CAP_X86_SMM)) {
if (kvm_check_extension(s, KVM_CAP_X86_SMM) &&
object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE) &&
pc_machine_is_smm_enabled(PC_MACHINE(ms))) {
smram_machine_done.notify = register_smram_listener;
qemu_add_machine_init_done_notifier(&smram_machine_done);
}