[PATCH v8 3/6] Documentation: ABI: overlays - global attributes
From: Pantelis Antoniou <hidden>
Date: 2016-05-09 13:10:25
Also in:
linux-devicetree, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Documentation ABI entry for overlays sysfs entries. Signed-off-by: Pantelis Antoniou <redacted> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- .../ABI/testing/sysfs-firmware-devicetree-overlays | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
new file mode 100644
index 0000000..e938f44
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays@@ -0,0 +1,24 @@ +What: /sys/firmware/devicetree/overlays/ +Date: October 2015 +Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com> +Description: + This directory contains the applied device tree overlays of + the running system, as directories of the overlay id. + +What: /sys/firmware/devicetree/overlays/enable +Date: October 2015 +Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com> +Description: + The master enable switch, by default is 1, and when + set to 0 it cannot be re-enabled for security reasons. + + The discussion about this switch takes place in: + http://comments.gmane.org/gmane.linux.drivers.devicetree/101871 + + Kees Cook: + "Coming from the perspective of drawing a bright line between + kernel and the root user (which tends to start with disabling + kernel module loading), I would say that there at least needs + to be a high-level one-way "off" switch for the interface so + that systems that have this interface can choose to turn it off + during initial boot, etc."
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1.7.12