Re: AHCI?

[Avi Kivity <avi@redhat.com>]

tsuraan wrote:
>> No plan that I know of.  Is the LSI scsi device not supported by Solaris?
>>     
>
> Yeah, there was a short thread about it last July
> (http://www.mail-archive.com/kvm@vger.kernel.org/msg01633.html).  The
> jist of it is that 64-bit OpenSolaris no longer supports the 53c895a
> SCSI controller.  According to that thread, the 53c1010 is what VMWare
> uses, and OpenSolaris still uses that.
>
>   

I see.  That sucks.

> I don't really understand how a VM exposes a virtual device to a
> hosted OS, but I assume that it involves looking at a driver for a
> piece of hardware and then writing some code that emulates the
> behaviour expected by that driver?  

The best way is to look at the device spec and write the emulation to 
conform to that.

> I would think AHCI would be a
> great way to go, if that's the case, since it would be an actual
> implementation of a standard instead of an arbitrary card.  Does kvm
> use the qemu source for its drivers, or is there a separate source
> tree for it now?  

We use the qemu source (we have our own branch, but it's very close to 
qemu upstream).


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