[Qemu-devel] AHCI emulation

[Qemu-devel] AHCI emulation

[Roland Elek]

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Seeing the controversy about the S3 Trio, and the fact that there seems to
be another applicant interested in it, I've decided to prepare a proposal
for the AHCI emulation project, the other project of my interest. I have
skimmed through the documentation and some Qemu code, and it seems to me
that to add AHCI emulation, I would have to implement an AHCI HBA and a SATA
device to connect to it. The SATA part could be an extension of the existing
IDE code. Am I right about these?

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Re: [Qemu-devel] AHCI emulation

[Roland Elek]

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> Excuse me but I do not see any other applicant interested in the S3
emulation however there is one application already for AHCI.
Could you guide me to that other applicant please?

I was referring to jai from IRC, according to a post by Alexander Graf in a
previous thread about the two projects in question.

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Re: [Qemu-devel] AHCI emulation

[Alexander Graf]

Roland Elek wrote:
> Seeing the controversy about the S3 Trio, and the fact that there
> seems to be another applicant interested in it, I've decided to
> prepare a proposal for the AHCI emulation project, the other project
> of my interest. I have skimmed through the documentation and some Qemu
> code, and it seems to me that to add AHCI emulation, I would have to
> implement an AHCI HBA and a SATA device to connect to it. The SATA
> part could be an extension of the existing IDE code. Am I right about
> these?
Muhammed Gamal (IIRC) was also interested in AHCI emulation.

Really, if you think you want to do the S3 emulation, go ahead and apply
for that :-). If you want to do the AHCI emulation, go ahead and apply
there. If you think you want do either of them, apply for both.

We haven't decided on any slots yet and we'll probably not be able to
take everyone, because Google's slots are limited. We'll do the sorting
after everyone applied :-).

Alex

Re: [Qemu-devel] AHCI emulation

[Luiz Capitulino]

On Tue, 6 Apr 2010 18:56:17 +0200
Roland Elek <elek.roland@gmail.com> wrote:

> Seeing the controversy about the S3 Trio, and the fact that there seems to
> be another applicant interested in it, I've decided to prepare a proposal
> for the AHCI emulation project, the other project of my interest. I have
> skimmed through the documentation and some Qemu code, and it seems to me
> that to add AHCI emulation, I would have to implement an AHCI HBA and a SATA
> device to connect to it. The SATA part could be an extension of the existing
> IDE code. Am I right about these?

 Jörg?

Re: [Qemu-devel] AHCI emulation

[Joerg Roedel]

Hello Roland, Luiz,

Sorry I missed this email. Here is my reply.

On Wed, Apr 07, 2010 at 09:57:27AM -0300, Luiz Capitulino wrote:
> On Tue, 6 Apr 2010 18:56:17 +0200
> Roland Elek <elek.roland@gmail.com> wrote:
> 
> > Seeing the controversy about the S3 Trio, and the fact that there seems to
> > be another applicant interested in it, I've decided to prepare a proposal
> > for the AHCI emulation project, the other project of my interest. I have
> > skimmed through the documentation and some Qemu code, and it seems to me
> > that to add AHCI emulation, I would have to implement an AHCI HBA and a SATA
> > device to connect to it. The SATA part could be an extension of the existing
> > IDE code. Am I right about these?

If we could extend the IDE code and if it makes sense should be
evaluated. My personal feeling is that it is easier to start from ground
and implement an AHCI HBA with SATA ports and SATA command
execution. We could merge it with the existing IDE code later if this
makes sense. We don't really know yet.

	Joerg