lkml.org 
[lkml]   [2013]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 12/14] x86: export x86 boot_params to sysfs
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@redhat.com>

Acked-by: Borislav Petkov <bp@suse.de>

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
--


\
 
 \ /
  Last update: 2013-12-13 21:41    [W:0.245 / U:0.744 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site