Re: [PATCH] qemu: use "ide" as device name for implicit SATA controller on Q35

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Sep 20, 2013 at 04:35:12PM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> > 1) Every SATA controller has 6 buses, and each bus allows a single
> > target (or "unit").
> 
> That is how it is modeled in qemu, largely due to reusing the ide code.
> 
> On real hardware you have a sata controller with a number of ports
> (happens to be 6 for the one emulated by qemu, but that may be different
> on other controllers).  You can plug a single device into each port.
> There is not really a concept of a sata bus.

Ok, so in libvirt terminology then, using 'unit' to map to the 'port'
is what we want to be doing, and ignore the 'bus' attribute for sata
drives.

> > (or are we just stuck with the current state of unit being interpreted
> > as bus for sata addresses? :-/)
> 
> I'd say continuing using 'unit' is fine.  When changing the way the
> address is specified in xml I'd rather go for something like this:
> 
>   <address type=sata controller=0 port=2 />

We already use type=drive for addressing sata drives (and indeed any
other drives attached to disk controllers), so we won't be inventing
a new address type.


Daniel
--
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list




[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]