The bug causes Windows + OVMF hang after reboot since OVMF
checks PMREGMISC to see if IO space is enabled and skip
configuration if it is.
Signed-off-by: Gleb Natapov <g...@redhat.com>
diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
index 0aace60..90b46b5 100644
--- a/hw/acpi_piix4.c
+++ b/hw/acpi_piix4.c
@@ -353,6 +353,9 @@ static void piix4_reset(void *opaque)
pci_conf[0x5a] = 0;
pci_conf[0x5b] = 0;
+ pci_conf[0x40] = 0x01; /* PM io base read only bit */
+ pci_conf[0x80] = 0;
+
if (s->kvm_enabled) {
/* Mark SMM as already inited (until KVM supports SMM). */
pci_conf[0x5B] = 0x02;
@@ -392,8 +395,6 @@ static int piix4_pm_initfn(PCIDevice *dev)
pci_conf[0x09] = 0x00;
pci_conf[0x3d] = 0x01; // interrupt pin 1
- pci_conf[0x40] = 0x01; /* PM io base read only bit */
-
/* APM */
apm_init(&s->apm, apm_ctrl_changed, s);
--
Gleb.
