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Re: [Qemu-devel] [PATCH] reset PMBA and PMREGMISC PIIX4 registers.
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] [PATCH] reset PMBA and PMREGMISC PIIX4 registers. |
Date: |
Wed, 15 Aug 2012 19:48:00 +0300 |
Ping.
On Tue, Aug 07, 2012 at 03:52:03PM +0300, Gleb Natapov wrote:
> 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 <address@hidden>
> 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.
--
Gleb.