Re: [Xen-devel] [PATCH 3/3] docs: qxl vga interface support

[ZhouPeng <zpengxen@xxxxxxxxx>]

On Wed, Jun 6, 2012 at 9:07 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Tue, 2012-06-05 at 12:26 +0100, ZhouPeng wrote:
>> Signed-off-by: Zhou Peng <ailvpeng25@xxxxxxxxx>
>
> You can/should include this with the patch which adds the functionality,
> no need to separate it out.
Ok.
>
>>
>> diff -r 1804a873a64d docs/man/xl.cfg.pod.5
>> --- a/docs/man/xl.cfg.pod.5   Tue Jun 05 17:56:46 2012 +0800
>> +++ b/docs/man/xl.cfg.pod.5   Tue Jun 05 18:58:12 2012 +0800
>> @@ -699,11 +699,14 @@ in the B<VFB_SPEC_STRING> for configurin
>>
>>  Sets the amount of RAM which the emulated video card will contain,
>>  which in turn limits the resolutions and bit depths which will be
>> -available. This option is only available when using the B<stdvga>
>> -option (see below). The default is 8MB which is sufficient for
>> -e.g. 1600x1200 at 32bpp. When not using the B<stdvga> option the
>> -amount of video ram is fixed at 4MB which is sufficient for 1024x768
>> +available. This option is available when using the B<stdvga> and
>> +B<qxl> options (see below).
>> +For B<stdvga> option, the default is 8MB which is sufficient for
>> +e.g. 1600x1200 at 32bpp. When not using the B<stdvga> and B<qxl> options,
>> +the amount of video ram is fixed at 4MB which is sufficient for 1024x768
>>  at 32 bpp.
>> +For B<qxl> option, it may be adjusted automatically (see B<qxlram>
>> +option below).
>>
>>  =item B<stdvga=BOOLEAN>
>>
>> @@ -711,6 +714,27 @@ emulated graphics device. The default is
>>  emulated graphics device. The default is false which means to emulate
>>  a Cirrus Logic GD5446 VGA card. If your guest supports VBE 2.0 or
>>  later (e.g. Windows XP onwards) then you should enable this.
>> +
>> +=item B<qxl=BOOLEAN>
>> +
>> +Select a QXL VGA card as the emulated graphics device. This enables
>> +the other QXL-related settings.
>> +In general, QXL should work with the Spice remote display protocol for
>> +acceleration, but QXL driver is necessary in guest. QXL can also work
>> +with the VNC protocol like a standard VGA without acceleration.
>> +
>> +=item B<qxlram=MBYTES>
>> +
>> +Sets the amount of RAM bar for QXL VGA card. The default is 64 MiB.
>> +The total size of QXL video memory is determined by B<qxlram> (RAM bar)
>> +and B<qxlvram> (VRAM bar), the size of each is settable.
>> +B<videoram> can set the amount of RAM which emulated video card
>> +will contain, but if it can't meet the need of QXL, it will be
>> +adjusted accordingly.
>> +
>> +=item B<qxlvram=MBYTES>
>> +
>> +Sets the amount of VRAM bar for QXL VGA card. The default is 64 MiB.
>
> It's not clear to me having read this what the distinction between RAM
> and VRAM is in the context of QXL. When and why would I want to set
> either?
Both of them are necessary to set qxl video ram.
They are necessary paremeters of qxl.

Any way, I will rich the document if get more info.
Thanks.
> Ian.
>



-- 
Zhou Peng

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