Re: [Xen-devel] Memory Mapped IO devices in a domU

[Matthew Fioravante <matthew.fioravante@xxxxxxxxxx>]

 On 12/10/2010 12:49 PM, Ian Pratt wrote:
> >    How would one pass a memory mapped device to a domU? In particular I'm
> > trying to pass the TPM to a domU. It is a memory mapped device with 5
> > pages starting at 0xfed40000.
> You probably actually want to pass locality 0 through to the guest, which is 
> one page starting at 0xfed40000.
>
> You can do this by adding the relevant mmio passthrough option to the domain 
> config file [I forget the actual name].
>
> The easiest way to ensure you're not using the device in dom0 is just not to 
> load the TPM driver. Alternatively, modify the dom0 driver to use another TPM 
> locality e.g. 1 (the page above).
>
> Ian
Does such an option even exist? I'm looking through the xm scripts in 
tools/python and I see options for iports and irqs, but nothing for 
memory mapped io.
> > Currently I'm playing with the memory_op hypercall, using
> > XENMEN_add_to_phys but its failing and I'm currently investigating why.
> > Is this even the right hypercall to use for this? How do I deal with the
> > fact that the device is already mapped into dom0 by default? Do I need to
> > explicitly unmap the pages from dom0 first somehow?

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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