Re: [Qemu-devel] [PATCH v4 3/6] defaults: ide-cd and scsi-cd devices suppress default CD-ROM

[Kevin Wolf <kwolf@redhat.com>]

Am 16.05.2011 15:04, schrieb Markus Armbruster:
> ide-hd does *not* suppress the default CD-ROM, unlike legacy
> ide-drive.
> 
> scsi-cd *does* suppress it, unlike legacy scsi-disk.
> 
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>  vl.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/vl.c b/vl.c
> index bffba69..e271c0b 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -279,7 +279,9 @@ static struct {
>      { .driver = "isa-serial",           .flag = &default_serial    },
>      { .driver = "isa-parallel",         .flag = &default_parallel  },
>      { .driver = "isa-fdc",              .flag = &default_floppy    },
> +    { .driver = "ide-cd",               .flag = &default_cdrom     },
>      { .driver = "ide-drive",            .flag = &default_cdrom     },
> +    { .driver = "scsi-cd",              .flag = &default_cdrom     },
>      { .driver = "virtio-serial-pci",    .flag = &default_virtcon   },
>      { .driver = "virtio-serial-s390",   .flag = &default_virtcon   },
>      { .driver = "virtio-serial",        .flag = &default_virtcon   },

Wow, I wasn't even aware that we have such magic in relatively new code
like -device. And that it's only effective for -device, but not -drive.
And to be honest, I really never wanted to know...

Anyway, you can't create an ide-hd on secondary master now because there
is the default CD-ROM already:

qemu-system-x86_64: -device ide-hd,drive=blubb,unit=0,bus=ide.1: IDE
unit 0 is in use
qemu-system-x86_64: -device ide-hd,drive=blubb,unit=0,bus=ide.1: Device
'ide-hd' could not be initialized

Kevin