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Diffstat (limited to 'hw/acpi/piix4.c')
-rw-r--r--hw/acpi/piix4.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 669be5bbf6..1efc0ded9f 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -74,6 +74,7 @@ struct PIIX4PMState {
     qemu_irq irq;
     qemu_irq smi_irq;
     int smm_enabled;
+    bool smm_compat;
     Notifier machine_ready;
     Notifier powerdown_notifier;
 
@@ -496,7 +497,8 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp)
 
     acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
-    acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val);
+    acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val,
+                      !s->smm_compat && !s->smm_enabled);
     acpi_gpe_init(&s->ar, GPE_LEN);
 
     s->powerdown_notifier.notify = piix4_pm_powerdown_req;
@@ -642,6 +644,7 @@ static Property piix4_pm_properties[] = {
                      use_acpi_root_pci_hotplug, true),
     DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState,
                      acpi_memory_hotplug.is_enabled, true),
+    DEFINE_PROP_BOOL("smm-compat", PIIX4PMState, smm_compat, false),
     DEFINE_PROP_END_OF_LIST(),
 };