Re: [Xen-devel] [Qemu-devel] [PATCH v3 2/4] GlobalProperty: Display warning about unused -global

[Andreas Färber <afaerber@xxxxxxx>]

Am 18.04.2014 17:36, schrieb Fabio Fantoni:
> 2014-04-18 17:21 GMT+02:00 Andreas Färber <afaerber@xxxxxxx
> <mailto:afaerber@xxxxxxx>>:
> 
>     Hi Don,
> 
>     Am 25.03.2014 00 <tel:25.03.2014%2000>:55, schrieb Don Slutz:
>     > This can help a user understand why -global was ignored.
>     >
>     > For example: with "-vga cirrus"; "-global vga.vgamem_mb=16" is just
>     > ignored when "-global cirrus-vga.vgamem_mb=16" is not.
>     >
>     > This is currently clear when the wrong property is provided:
>     >
>     > out/x86_64-softmmu/qemu-system-x86_64 -global
>     cirrus-vga.vram_size_mb=16 -monitor pty -vga cirrus
>     > char device redirected to /dev/pts/20 (label compat_monitor0)
>     > qemu-system-x86_64: Property '.vram_size_mb' not found
>     > Aborted (core dumped)
>     >
>     > vs
>     >
>     > out/x86_64-softmmu/qemu-system-x86_64 -global vga.vram_size_mb=16
>     -monitor pty -vga cirrus
>     > char device redirected to /dev/pts/20 (label compat_monitor0)
>     > VNC server running on `::1:5900'
>     > ^Cqemu: terminating on signal 2
> 
> 
> I added the cirrus video memory setting in libxl time ago (using -global
> vga.vram_size_mb), testing it with qemu 1.3 and also on qemu 1.6 when I
> changed from -vga to -device if I remember good.
> Has been changed in recent versions or something was not right even
> though it seemed right to me?

There are multiple graphics cards to choose from. When using -vga std or
-device vga, then -global vga.foo=bar gets used; if -vga cirrus or
-device cirrus-vga then it needs to be -global cirrus-vga.foo=bar and
any -global vga.foo=bar gets ignored - unless you manage to add it as
secondary (PCI) graphics card.

Regards,
Andreas

P.S. Please remember to use text format mails.

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