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Date: Thu, 12 Jul 2012 13:33:01 +0200
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Subject: Re: [Qemu-devel] [PATCH v2] ahci: add -drive support
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To: Markus Armbruster <armbru@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Alexander Graf <agraf@suse.de>, qemu-devel qemu-devel <qemu-devel@nongnu.org>

Il 12/07/2012 13:09, Markus Armbruster ha scritto:
>> >
>> > It isn't. AHCI is on the same level as IDE. They both speak ATA, but
>> > the guest os interface is completely different. You can write a
>> > generic IDE driver, but that won't be able to talk to an AHCI
>> > controller in AHCI mode. You can write a generic AHCI driver, but that
>> > won't be able to talk to an IDE controller.
> Yes, but does the naive command line user care?
> 
> -serial configures a serial device.  The kind of device depends on the
> board: 16550A UARTs with -M pc, Exynos 4210 UARTs with -M nuri, ColdFire
> UARTs with -M an5206, ...  You can't write a generic serial device
> driver.

The naive command line user uses -cdrom or just "qemu file.img", they do
not use -drive.

The non-naive command line user who has so far been using -drive with
if=ide, can learn to omit it when they move to q35.

Paolo