On Mon, Dec 09, 2013 at 05:42:25PM +0800, Dave Young wrote:
> kexec-tools use boot_params for getting the 1st kernel hardware_subarch,
> the kexec kernel efi runtime support also need read the old efi_info from
> boot_params. Currently it exists in debugfs which is not a good place for
> such infomation. Per HPA, we should avoid of "sploit debugfs".
>
> In this patch /sys/kernel/boot_params are exported, also the setup_data is
> exported as a subdirectory. kexec-tools is using debugfs for hardware_subarch
> for a long time now so we're not removing it yet.
>
> Structure is like below:
>
> /sys/kernel/boot_params
> |__ data /* boot_params in binary*/
> |__ setup_data
> | |__ 0 /* the first setup_data node */
> | | |__ data /* setup_data node 0 in binary*/
> | | |__ type /* setup_data type of setup_data node 0, hex string */
> [snip]
> |__ version /* boot protocal version (in hex, "0x" prefixed)*/
>
> Changelog:
> Greg: use __ATTR_RO() and group attr.
> Matt and Boris: Documentation improvement, code indentation.
>
> Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
Acked-by: Borislav Petkov <bp@xxxxxxx>
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
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