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[Qemu-devel] Re: [RFC] [PATCH] add ahci support into qemu


From: Sebastian Herbszt
Subject: [Qemu-devel] Re: [RFC] [PATCH] add ahci support into qemu
Date: Tue, 4 May 2010 22:56:19 +0200

Elek Roland wrote:
On v, 2010-05-02 at 17:56 +0200, Elek Roland wrote:
I'm going to try the patch in practice as
soon as I finish my university project. (It's due today.)

I've tried the patch, and I can confirm that it does provide an AHCI
device and a SATA disk. It shows up in qemu as an Intel Corporation
82801FR/FRW (ICH6R/ICH6RW) SATA Controller, which is consistent with the
device and vendor IDs in the code. I could successfully create an ext2
filesystem on the virtual disk, mount it, write a text file on it and
read it back.
I've noticed the following errors:
- The source code claims to implement 2 ports, Linux reports 3.
- When I halt the guest OS, the AHCI device throws a hardware error
about an unimplemented command.

Those issues should be fixed now by the following two patches:

0001-fix-port-count-cap-and-version-etc-to-ahci.patch
0002-add-WIN_STANDBYNOW1-process-into-ahci.patch

Sebastian

I think we could clean up the code and use it as a basis for full
support.

Regards,
Roland








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