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Re: [Qemu-devel] [PATCH v2] ahci: add -drive support
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH v2] ahci: add -drive support |
Date: |
Mon, 09 Jul 2012 13:19:49 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) |
Alexander Graf <address@hidden> writes:
> On 09.07.2012, at 13:06, Markus Armbruster wrote:
>
>> Kevin Wolf <address@hidden> writes:
>>
>>> Am 09.07.2012 10:50, schrieb Markus Armbruster:
>>>> Alexander Graf <address@hidden> writes:
>>>>
>>>>> We've had support for creating AHCI devices using -device for a while now,
>>>>> but it's cumbersome to users. We really should provide an easier way for
>>>>> them to leverage the power of AHCI!
>>>>>
>>>>> So let's introduce a new if= option to -drive, giving users the same
>>>>> command line experience as for scsi or ide.
>>>>>
>>>>> Signed-off-by: Alexander Graf <address@hidden>
>>>>>
>>>>> ---
>>>>>
>>>>> v1 -> v2:
>>>>>
>>>>> - support more than a single drive per adapter
>>>>> - support index= option
>>>>> - treat IF_AHCI the same as IF_IDE
>>>>
>>>> Inhowfar? Not obvious to me from the patch, or the diff patch v1.
>>>>
>>>>> - add is_ata() helper to match AHCI || IDE
>>>>
>>>> Not addressed:
>>>>
>>>> Once we switch to q35, if=ahci will become a redundant wart: to add
>>>> drives to the board's AHCI controller, you'll have to use if=ide.
>>>> if=ahci will create new controllers, which is generally not what you
>>>> want. Ugh.
>>>
>>> Can we even make it the default with q35 as long as our AHCI controller
>>> doesn't also expose a legacy interface for compatibility?
>>
>> Err, what else could we do with if=ide with q35?
>
> We could create a cmd646 and attach drives to that.
Naive use of the command line then connects your drives to some an old
and slow add-on controller instead of the perfectly servicable and fast
on-board controller.
Let me rephrase my question: s/could/should/
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, (continued)
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Kevin Wolf, 2012/07/09
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Gleb Natapov, 2012/07/09
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Kevin Wolf, 2012/07/09
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Gleb Natapov, 2012/07/09
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Gerd Hoffmann, 2012/07/09
- Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Markus Armbruster, 2012/07/09
Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Markus Armbruster, 2012/07/09
Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Alexander Graf, 2012/07/11
Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Gerd Hoffmann, 2012/07/12
Re: [Qemu-devel] [PATCH v2] ahci: add -drive support, Markus Armbruster, 2012/07/12