From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Chen, Tiejun" <tiejun.chen@intel.com>
Subject: Re: [v2][PATCH 4/8] xen,
 gfx passthrough: reserve 00:02.0 for INTEL IGD
Date: Mon, 30 Jun 2014 18:23:28 +0800
Message-ID: <53B13AA0.1070707@intel.com>
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To: Gerd Hoffmann <kraxel@redhat.com>, Don Slutz <dslutz@verizon.com>
Cc: "peter.maydell@linaro.org" <peter.maydell@linaro.org>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, "stefano.stabellini@eu.citrix.com" <stefano.stabellini@eu.citrix.com>, "jean.guyader@eu.citrix.com" <jean.guyader@eu.citrix.com>, "mst@redhat.com" <mst@redhat.com>, "Kay, Allen M" <allen.m.kay@intel.com>, "Kelly.Zytaruk@amd.com" <Kelly.Zytaruk@amd.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "anthony.perard@citrix.com" <anthony.perard@citrix.com>, "anthony@codemonkey.ws" <anthony@codemonkey.ws>, "Zhang,
	Yang Z" <yang.z.zhang@intel.com>
List-Id: xen-devel@lists.xenproject.org

On 2014/6/30 17:29, Gerd Hoffmann wrote:
>    Hi,
>
>>>>>                /* Make cirrues VGA S3 suspend/resume work in Windows
>>>>> XP/2003 */
>>>>>                Device (VGA)
>>>>>                {
>>>>> -               Name (_ADR, 0x00020000)
>>>>> +               // Address of the VGA (device F function 0)
>>>>> +               Name (_ADR, 0x000F0000)
>>>>>
>>>
>>> With this change I still didn't see anything.
>>>
>>
>> This does not match with what I see.
>>
>> Looks like linux does not care about the acpi data.  Using
>
> The acpi data doesn't matter at all for the boot screen, the vgabios
> doesn't look at it.
>
>> (d12) Scan for VGA option rom
>> (d12) Running option rom at c000:0003
>
> seabios loaded+initialized the vgabios (from the pci rom bar of the vga
> device).  Which slot the vga is installed at should not matter at all.
> seabios scans the pci bus and should find the vga with no problems no
> matter where it is.
>
>> (XEN) stdvga.c:147:d12v0 entering stdvga and caching modes
>
> Seems to have worked fine ;)
>
>> (d12) pmm call arg1=0
>> (d12) Turning on vga text mode console
>> (d12) SeaBIOS (version rel-1.7.5-0-ge51488c-20140626_113926-dcs-xen-54)
>
> At this point you should see the seabios banner at the vga screen.
>
>> And the VGA screen has the SeaBIOS messages:
>>
>> SeaBIOS (version rel-1.7.5-0-ge51488c-20140626_113926-dcs-xen-54)
>> Machine UUID 18cf5fd0-e564-49c4-b63f-e6c3c23b1294
>
> As it should be.
>
> Now the questions is why it doesn't work for Tiejun ...

Gerd and Don,

Thanks for your information.

But I have no time to validate this configuration now, I will update 
this as soon as I try Don's config file.

Thanks again.

Tiejun

> Anything in the logs?
>
> cheers,
>    Gerd
>
>
>
>