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authorDaniel Thompson <daniel.thompson@linaro.org>2017-05-08 15:56:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-08 17:15:12 -0700
commitcff75e0b6fe835800f8e08a32d731119cd9e3b79 (patch)
tree54f112a3576c1bb91c2e7e7205e9d02ec458e137 /usr/Kconfig
parentda5e108b0288d390dae40f51c09bbb30358bf7a7 (diff)
downloadleg-kernel-cff75e0b6fe835800f8e08a32d731119cd9e3b79.tar.gz
initramfs: provide a way to ignore image provided by bootloader
Many "embedded" architectures provide CMDLINE_FORCE to allow the kernel to override the command line provided by an inflexible bootloader. However there is currrently no way for the kernel to override the initramfs image provided by the bootloader meaning there are still ways for bootloaders to make things difficult for us. Fix this by introducing INITRAMFS_FORCE which can prevent the kernel from loading the bootloader supplied image. We use CMDLINE_FORCE (and its friend CMDLINE_EXTEND) to imply that the system has an inflexible bootloader. This allow us to avoid presenting this config option to users of systems where inflexible bootloaders aren't usually a problem. Link: http://lkml.kernel.org/r/20170217121940.30126-1-daniel.thompson@linaro.org Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr/Kconfig')
-rw-r--r--usr/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/usr/Kconfig b/usr/Kconfig
index 6278f135256d..c0c48507e44e 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -21,6 +21,16 @@ config INITRAMFS_SOURCE
If you are not sure, leave it blank.
+config INITRAMFS_FORCE
+ bool "Ignore the initramfs passed by the bootloader"
+ depends on CMDLINE_EXTEND || CMDLINE_FORCE
+ help
+ This option causes the kernel to ignore the initramfs image
+ (or initrd image) passed to it by the bootloader. This is
+ analogous to CMDLINE_FORCE, which is found on some architectures,
+ and is useful if you cannot or don't want to change the image
+ your bootloader passes to the kernel.
+
config INITRAMFS_ROOT_UID
int "User ID to map to 0 (user root)"
depends on INITRAMFS_SOURCE!=""