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    Subject[PATCH v8 3/6] Documentation: ABI: overlays - global attributes
    Date
    Documentation ABI entry for overlays sysfs entries.

    Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
    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."
    --
    1.7.12
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