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

[ZhouPeng <zpengxen@xxxxxxxxx>]

On Thu, Jun 7, 2012 at 2:24 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Thu, 2012-06-07 at 04:22 +0100, ZhouPeng wrote:
>> 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.
>
> But they aren't necessary at the xl layer, right? I can just omit them
> and a correct value will be chosen for me?

I means if user want to adjust the qxl total ram, both parameters
are necessary to be considered.

But if just use the default, both can be omitted, and a
correct value will be chosen by qxl (which is like get_qxl_ram(64, 64) = 128).
>
>>
>> Any way, I will rich the document if get more info.
>> Thanks.
>> > Ian.
>> >
>>
>>
>>
>
>



-- 
Zhou Peng

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel