Re: PAE, PCI pass-through

[Sarton O'Brien <bsd-xen%roguewrt.org@localhost>]

Manuel Bouyer wrote:
> Hi,
> I did a bunch of xen-related commits yesterday, here's some words
> about it:
>
> - I fixed a size mismatch between function prototypes and assembly
>   implementation of bus_space when PAE is defined. With this hardware
>   drivers are working with PAE kernels. After fixing a few printf formats
>   and type mismatch it's possible to build a working PAE XEN3_DOM0
>   kernel. I added a XEN3PAE_DOM0 kernel config, but it's not built
>   by default for now. I also updated the xenkernel3 package to
>   install PAE xen kernels in addition to non-PAE ones.
>   Upgrading to PAE is just a matter of installing a PAE-enabled xen.gz
>   and /netbsd, and PAE kernels for domUs, no other changes are required.
>
> - I commited the xen3 PCI front-end device. To use it, add to your
>   domU config file
> xpci* at xenbus ?
> pci* at xpci ?
>   and then the PCI drivers you need.
>   It has been succesffully tested only with ahc(4) and piixide(4).
>   uhci(4) failed trying to allocate a large contigous DMA buffer;
>   this needs to be tracked down.
>   For now, you need a linux dom0 to use it.

That's pretty cool. Well done and thank you. I'm sure I'm not the only 
one who greatly appreciates your efforts.

Out of curiosity, if I were to require /dev/sd0 (a usb disk attached to 
dom0) as a physical device (rather than a virtual one) under a domu, 
would that require usb to be passed to the domu?

Just asking the question has made me think 'yes', as I would need the 
attach/detach routines available ... unless there is something else that 
can communicate this ...

Thanks again,

Sarton