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From: "Andrew D. Ball" <aball@linux.vnet.ibm.com>
To: Kaushik Barde <Kaushik_Barde@Phoenix.com>
Cc: Xen devel list <xen-devel@lists.xensource.com>
Subject: Re: EPS Signature
Date: Tue, 06 Feb 2007 15:43:52 +0000	[thread overview]
Message-ID: <1170776632.2164.4.camel@anball> (raw)
In-Reply-To: <D4E70D3B2069CB4AA41CD5D4A7DEED00324869@scl-exch2k3.phoenix.com>

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

  parent reply	other threads:[~2007-02-06 15:43 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-01 13:53 xensource (pci) device id's? Gerd Hoffmann
2007-02-01 13:58 ` Ian Campbell
2007-02-01 14:30   ` Gerd Hoffmann
2007-02-01 15:45     ` Gerd Hoffmann
2007-02-02  9:26       ` Ian Campbell
2007-02-02  9:47         ` Gerd Hoffmann
2007-02-02 18:25       ` Keir Fraser
2007-02-05  8:48         ` Gerd Hoffmann
2007-02-05 14:20         ` Gerd Hoffmann
2007-02-02 19:03       ` Keir Fraser
2007-02-05  2:29         ` EPS Signature Kaushik Barde
2007-02-05  2:52           ` Ian Pratt
2007-02-10  7:52             ` GDT access from DOM-0 driver Kaushik Barde
2007-02-11  1:33             ` EPS Signature Kaushik Barde
2007-02-11 10:09               ` Keir Fraser
2007-02-11 23:39                 ` Kaushik Barde
2007-02-12  0:58                   ` Keir Fraser
2007-02-12  2:36                     ` Kaushik Barde
2007-02-12  7:43                       ` Keir Fraser
2007-02-06 15:43           ` Andrew D. Ball [this message]
2007-02-05  8:55         ` xensource (pci) device id's? Gerd Hoffmann
2007-02-01 20:02     ` Zulauf, John
2007-02-01 20:29       ` Ian Campbell
2007-02-01 23:22         ` Keir Fraser
2007-02-02  8:15         ` Gerd Hoffmann
2007-02-01 23:17       ` Keir Fraser

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