Commit 4d09d37c authored by Gleb Natapov's avatar Gleb Natapov Committed by Anthony Liguori
Browse files

reset PMBA and PMREGMISC PIIX4 registers. 



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: default avatarLaszlo Ersek <lersek@redhat.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent 4bdb1a30

hw/acpi_piix4.c

+3 −2
Original line number Diff line number Diff line
@@ -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);