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| author | Bastian Krause <bst@pengutronix.de> | 2019-09-27 11:59:52 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-09-30 20:39:04 +0200 |
| commit | aada84e72e150e0d0abc835f5b2237d64499f9e0 (patch) | |
| tree | e4c7d46eba389edbdec0a46fbb4d26f1ca661cc5 /common/Kconfig | |
| parent | 0ef90e6b42aa38e07623d37583d30caab2582cd6 (diff) | |
| download | barebox-aada84e72e150e0d0abc835f5b2237d64499f9e0.tar.gz barebox-aada84e72e150e0d0abc835f5b2237d64499f9e0.tar.xz | |
common: machine_id: introduce machine id generation
This patch adds functionality to pass device-specific information that
will be hashed to generate a persistent unique machine id. It is then
available as global.machine_id. It can be overwritten with
nv.machine_id if necessary. Passing the machine id to the kernel is
done in a separate patch.
Note: if multiple sources provide hashable device-specific information
(via machine_id_set_hashable()) the information provided by the last call
prior to the late initcall set_machine_id() is used to generate the
machine id from. Thus when updating barebox the machine id might change.
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/Kconfig')
| -rw-r--r-- | common/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/common/Kconfig b/common/Kconfig index cafaadb3d4..7c56eb469e 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -982,6 +982,24 @@ config RESET_SOURCE of the reset and why the bootloader is currently running. It can be useful for any kind of system recovery or repair. +config MACHINE_ID + bool "pass machine-id to kernel" + depends on FLEXIBLE_BOOTARGS + depends on SHA1 + help + Sets the linux.bootargs.machine_id global variable with a value of + systemd.machine_id=UID. The UID is a persistent device-specific + id. It is a hash over device-specific information provided by various + sources. + + Note: if multiple sources provide hashable device-specific information + (via machine_id_set_hashable()) the information provided by the last call + prior to the late initcall set_machine_id() is used to generate the + machine id from. Thus when updating barebox the machine id might change. + + Note: if no hashable information is available no machine id will be passed + to the kernel. + endmenu menu "Debugging" |