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

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

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?


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



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