Re: [Xen-devel] EPS Signature

["Andrew D. Ball" <aball@xxxxxxxxxxxxxxxxxx>]

A long time ago Ian Pratt helped me get the OpenIPMI driver to work when
it
needed to read SMBIOS data by bus address.  I wonder how much has
changed since then.  You can at least get to the data in user space with
mmap() on /dev/mem right?

Peace.
Andrew

On Sun, 2007-02-04 at 18:29 -0800, Kaushik Barde wrote:
> Hi,
> 
> We want to access the EBDA Entry Point Signature at 40:0E for our DOM-0 
> through a driver,
> We noticed that driver is trying to read from a pseudo physical location and 
> not the physical machine RAM location. Hence it's not getting the proper 
> value. But if we have to read from the machine RAM location we can use ( 
> virt_to_bus or bus_to_virt) per dev_list comments. 
> 
> But this area is under the control of hypervisor. I do not know if we can 
> ioremap these pages ( those which belong to hypervisor). 
> 
> I am trying to see if we can be able to get to the 40:0E address. And get the 
> correct EPS signature
> 
> -Kaushik
> 
> 
> 
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