Am 14.12.2010 01:34, schrieb Alexander Graf: > This patch adds support for AHCI emulation. I have tested and verified it > works > in Linux, OpenBSD, Windows Vista and Windows 7. This AHCI emulation supports > NCQ, so multiple read or write requests can be outstanding at the same time. > > The code is however not fully optimized yet. I'm fairly sure that there are > low hanging performance fruits to be found still :). In my simple benchmarks > I achieved about 2/3rd of virtio performance. > > Also, this AHCI emulation layer does not support legacy mode. So if you're > using a disk with this emulation, you do not get it exposed using the legacy > IDE interfaces. > > Another nitpick is CD-ROM support in Windows. Somehow it doesn't detect a > CD-ROM drive attached to AHCI. At least it doesn't list it. > > To attach an AHCI disk to your VM, please use > > -drive id=disk,file=...,if=none -device ahci,id=ahci \ > -device ide-drive,drive=disk,bus=ahci.0 > > This patch set is based on work done during the Google Summer of Code. I was > mentoring a student, Roland Elek, who wrote most of the AHCI emulation code > based on a patch from Chong Qiao. A bunch of other people were also involved, > so everybody who I didn't mention - thanks a lot! > > git://repo.or.cz/qemu/ahci.git ahci
I have applied everything but patch 4 (including patch 12/11) to the block branch. Before I can include it in a pull request I need at least a new version of patch 3 and you'll probably want to have a new patch 4 in. There's no need to resend the rest of the patch series. For the changes needed please see the comments on the individual patches. Kevin
