Hi Joe,

On Sun, Jan 19, 2014 at 2:21 PM, Joe Maloney <jpm...@gmail.com> wrote:
> I’ve been trying to get bhyve to work on a system with the following specs:
>
> FreeBSD 10.0 64 bit
> ASUS P6T Deluxe
> Intel i7 920
>
> According to what I’ve researched my cpu should have the VT-D extensions.  
> However many users of this motherboard have complained about ASUS not 
> properly supporting VT-D with Xen and something about a problem with tables 
> getting corrupt due to a problem with the bios.  On the third link below 
> which is the Xen wiki it even states that this motherboard needs a bios 
> update which is not available to the public.
>
> https://communities.intel.com/thread/28389
>
> http://vip.asus.com/forum/view.aspx?id=20090402224408018&SLanguage=en-us&board_id=1
>
> http://wiki.xen.org/wiki/VTd_HowTo
>
> I am curious though if this would be what would be causing my problem with 
> bhyve?  I suppose I am willing to just by a new motherboard if so.
>
> I can run kldload vmm and I see a bunch of text fly by and then something 
> about uhci interrupt problem.  As soon as that happens the messages repeats 
> my network drops and no keyboard input.  However the message repeats and it 
> doesn’t appear that the system has fully locked up otherwise.  However on 
> another system that works I notice that kldload VMM does not show this 
> information it just loads the module.
>
> Is there a way I can gather more logs somehow so that I can determine what 
> text is appearing before the uhci errors?  Perhaps some kind of dump 
> procedure?  Or is there a way I can confirm that freebsd can properly see and 
> utilize the VT-D extensions.  VirtualBox runs fine with the VT extensions 
> enabled.  I also made sure VirtualBox wasn’t installed or loaded before I 
> tried bhyve.  I’ve tried to research for a week or two before posting here.
>

I have a patch to not initialize the iommu unless there are passthru
devices explicitly configured for bhyve to use.

It is available here:
http://people.freebsd.org/~neel/patches/bhyve_iommu_init.patch

Could you give it a spin and see if it helps with the ASUS system?

best
Neel

> Joe Maloney
>
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