Re: [Xen-devel] [PATCH V4 12/15] Add efi_arch_use_config_file() function to control use of config file

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 12.09.14 at 01:54, <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> On Thu, 11 Sep 2014, Jan Beulich wrote:
>> >>> On 10.09.14 at 02:52, <roy.franz@xxxxxxxxxx> wrote:
>> > -    cols = rows = depth = 0;
>> > -    if ( !base_video )
>> > -    {
>> > -        name.cs = get_value(&cfg, section.s, "video");
>> > -        if ( !name.cs )
>> > -            name.cs = get_value(&cfg, "global", "video");
>> > -        if ( name.cs && !strncmp(name.cs, "gfx-", 4) )
>> > +        cols = rows = depth = 0;
>> > +        if ( !base_video )
>> >          {
>> > -            cols = simple_strtoul(name.cs + 4, &name.cs, 10);
>> > -            if ( *name.cs == 'x' )
>> > -                rows = simple_strtoul(name.cs + 1, &name.cs, 10);
>> > -            if ( *name.cs == 'x' )
>> > -                depth = simple_strtoul(name.cs + 1, &name.cs, 10);
>> > -            if ( *name.cs )
>> > -                cols = rows = depth = 0;
>> > +            name.cs = get_value(&cfg, section.s, "video");
>> > +            if ( !name.cs )
>> > +                name.cs = get_value(&cfg, "global", "video");
>> > +            if ( name.cs && !strncmp(name.cs, "gfx-", 4) )
>> > +            {
>> > +                cols = simple_strtoul(name.cs + 4, &name.cs, 10);
>> > +                if ( *name.cs == 'x' )
>> > +                    rows = simple_strtoul(name.cs + 1, &name.cs, 10);
>> > +                if ( *name.cs == 'x' )
>> > +                    depth = simple_strtoul(name.cs + 1, &name.cs, 10);
>> > +                if ( *name.cs )
>> > +                    cols = rows = depth = 0;
>> > +            }
>> 
>> So how is this video mode selection being represented then without
>> config file? Don't you need to at least add a command line option for
>> that?
> 
> The scenario without config file is the one where Xen is loaded by GRUB.
> Do we actually need to pass a video mode option in that case?
> Wouldn't GRUB take care of changing video mode itself to the value
> specified by the user before booting Xen? Xen can query the current
> video mode afterwards.

Ah, right, that's a good point.

Jan


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