Re: [PATCH -mm -v4 0/3] i386/x86_64 boot: 32-bit boot protocol

[Huang, Ying]

On Tue, 2007-10-09 at 12:23 -0700, H. Peter Anvin wrote:
> Huang, Ying wrote:
> > 
> > - Which fields of boot parameters should be exported directly in
> >   sysfs? Export all fields of boot parameters in sysfs is too complex
> >   and unnecessary. Which fields should be?
> > 
> 
> The main this is that since this is a fixed-format, ABI-defined 
> structure, regardless of individual fields it should be exported as a 
> binary object.  That is also the only way to deal with a kernel which 
> may not itself know about specific items making the data available to 
> other users, like kexec.
> 
> It's not clear to me from reading the code what model you're using for 
> exporting this data in sysfs.  Could you describe it in some detail?
> 
> What I had envisioned would be an object for the boot_params structure 
> and a systematic object for each linked-list object, at a very minimum.
> 

OK. The directory structure is as follow:

+ sys + kernel + boot_params - version			/* version of boot protocol */
                             - data			/* binary file of boot_params */
                             + setup_data + 0 - type	/* type id of setup_data 0 */
                                              - data	/* binary file of setup_data 0 */
                                          + 1 - type	/* type id of setup_data 1 */
                                              - data	/* binary file of setup_data 1 */
                                          + 2 - type
                                              - data
                                          ...

Best Regards,
Huang Ying
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