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Date: Wed, 15 Aug 2012 19:48:00 +0300
From: Gleb Natapov <gleb@redhat.com>
Message-ID: <20120815164800.GC21708@redhat.com>
References: <20120807125203.GC3341@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] reset PMBA and PMREGMISC PIIX4 registers.
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To: qemu-devel@nongnu.org
Cc: lersek@redhat.com, Anthony Liguori <anthony@codemonkey.ws>

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 <gleb@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.

--
			Gleb.