On 09.07.2012, at 11:11, Kevin Wolf wrote: > Am 09.07.2012 10:50, schrieb Markus Armbruster: >> Alexander Graf <ag...@suse.de> 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 <ag...@suse.de> >>> >>> --- >>> >>> 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?
What legacy interface? The ICH-9 can be controlled by the _BIOS_ to switch between 2 PCI IDs. One for IDE mode, one for AHCI mode. I don't think that would help us here, would it? Alex