[LinuxBIOS] newbie: flashrom cannot find flash device

Bari Ari bari at onelabs.com
Mon Jul 24 04:59:25 CEST 2006

Wolfgang Spraul wrote:
> Hi there -
> I'm trying to use LinuxBIOS to help me out with a problem I have with a 
> recently acquired Panasonic R5 notebook: Panasonic decided to disable 
> Intel Virtualization Support in the BIOS startup code (WRMSR instruction 
> to set the lock bit in the CPU's Feature Control MSR) without giving me 
> the option to override this in the BIOS menus or offering BIOS updates.
> So my plan now is this: 'Download' my BIOS (PhoenixBIOS V1.00L13), 
> disassemble & modify the WRMSR instruction, re-flash it onto the board 
> (hopefully the BIOS instructions themselves are not compressed or 
> encrypted).
> First of all the latest (svn) flashrom does not detect my flash device. 
>  From prior posts on this mailing lists I deduced I may have an 'Intel 
> firmware hub'? No idea what that is...
> flashrom -V output and lspci -V follow below.
> My questions:
> 1) Is there a chance I can use flashrom to read/write my BIOS code. What 
> is missing? Can anybody point me in any direction from the flashrom -V 
> output below? Should I open the notebook to try to find any chip label?
> 2) Has anybody ever 'patched' an off-the-shelf PhoenixBIOS? Is that a 
> realistic proposition at all, or will it be impossible because the 
> binary is compressed/encrypted/signed/whatever?

Guide to Award BIOS Reverse Engineering

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