Re: [Xen-users] Success Story: debian lenny 64bit, xen 4.0, pv_ops 2.6.31.13, VT-d

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Apr 09, 2010 at 01:29:29PM -0400, chris wrote:
> Nope, just an old habit. I didn't realize it had changed. So iommu=1
> should be enough by itself? 

Yeah. iommu=1 is the default setting, so also that can be skipped.

> I was also curious where it says vt-d for
> pv guests disabled? You cant have it for both hvm and pv at the same
> time?
>

iommu=pv should enable it also for pv guests.
Although pv guests don't need iommu for pci passthrough.. it just gives extra 
security.

-- Pasi
 
> On Fri, Apr 9, 2010 at 12:57 PM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > On Fri, Apr 09, 2010 at 12:28:51PM -0400, chris wrote:
> >> Hello,
> >>
> >> I have seen quite a bit of posts regarding Xen 4.0 on debian/ubuntu. I
> >> just wanted to report that my first Xen4 install went great. I am
> >> running a ASUS Z8NA-D6 Dual LGA1366 Motherboard with two Xeon 5520's,
> >> 24GB ram, software raid-1. Everything seems to be working very well
> >> even VT-d which is surprising :) Below is some output of my first
> >> successful boot:
> >>
> >
> > Good to hear it works!
> >
> >> xm info
> >> http://pastebin.com/6e5EG2Tv
> >>
> >> xm dmesg
> >> http://pastebin.com/8vwhkkph
> >>
> >
> > (XEN) Command line: vtd=1 iommu=1 dom0_mem=512M loglvl=all guest_loglvl=all
> >
> > "vtd=1" is old/obsolete parameter, it's not used anymore.
> > Also "iommu=1" is the default in Xen 4.0.0, so that's not needed either :)
> >
> > "iommu=verbose" can be used to get more debugging output,
> > especially if IO virtualization doesn't get enabled.
> >
> >> dom0 dmesg
> >> http://pastebin.com/RDDVYNgK
> >>
> >> I used the wiki page http://wiki.xensource.com/xenwiki/Xen4.0 as a
> >> guide and everything went well.
> >>
> >
> > Was vtd=1 mentioned somewhere there?
> >
> > -- Pasi
> >
> >

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