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

Re: [Xen-devel] [PATCH 4 of 4] Linux pvops: xen pci platform device driver



On Wed, 2010-03-03 at 17:14 +0100, Bastian Blank wrote:
> 
> > During the initialization of the xen pci device driver, we write to
> a
> > magic ioport that causes qemu to unplug some emulated devices, disc
> and
> > network in particular.
> > This parameter is meant to present the user a choice about what
> emulated
> > devices to unplug.
> 
> Somehow I don't think this belongs here. It looks like a workaround,
> you can always ask qemu to not bind them at the beginning and the
> guest system to not provide drivers. 

Qemu needs to start off providing the devices so that the BIOS and
bootloader can do their thing. It's only once the final OS is up and
running that we want to swap to the paravirt drivers and this interface
provides a safe mechanism to ensure only one set of devices is active at
a time.

Ian.

-- 
Ian Campbell
Current Noise: Spiritual Beggars - Euphoria

Usage: fortune -P [-f] -a [xsz] Q: file [rKe9] -v6[+] file1 ...


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.