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reset PMBA and PMREGMISC PIIX4 registers.

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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.

Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gleb Natapov 2012-08-07 15:52:03 +03:00 committed by Anthony Liguori
parent 4bdb1a3059
commit 4d09d37c6a
1 changed files with 3 additions and 2 deletions
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5
hw/acpi_piix4.c
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@ -352,6 +352,9 @@ 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;
@ -391,8 +394,6 @@ 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);