Eric Lee / smarc-fsl-linux-kernel

20 Apr, 2017

1 commit

  • 4f1927dcb   Annotate hardware config module parameters in drivers/misc/ ... Browse Code »

    When the kernel is running in secure boot mode, we lock down the kernel to
    prevent userspace from modifying the running kernel image. Whilst this
    includes prohibiting access to things like /dev/mem, it must also prevent
    access by means of configuring driver modules in such a way as to cause a
    device to access or modify the kernel image.

    To this end, annotate module_param* statements that refer to hardware
    configuration and indicate for future reference what type of parameter they
    specify. The parameter parser in the core sees this information and can
    skip such parameters with an error message if the kernel is locked down.
    The module initialisation then runs as normal, but just sees whatever the
    default values for those parameters is.

    Note that we do still need to do the module initialisation because some
    drivers have viable defaults set in case parameters aren't specified and
    some drivers support automatic configuration (e.g. PNP or PCI) in addition
    to manually coded parameters.

    This patch annotates drivers in drivers/misc/.

    Suggested-by: Alan Cox
    Signed-off-by: David Howells
    Acked-by: Greg Kroah-Hartman
    cc: Arnd Bergmann

    David Howells
     

10 Jul, 2014

1 commit

28 May, 2013

1 commit

17 May, 2013

1 commit

26 Mar, 2013

1 commit

  • 54f69b92f   dummy-irq: introduce a dummy IRQ handler driver ... Browse Code »

    This module accepts a single 'irq' parameter, which it should register for.

    Its sole purpose is to help with debugging of IRQ sharing problems, by
    force-enabling IRQ that would otherwise be disabled.

    Suggested-by: Alan Stern
    Signed-off-by: Jiri Kosina
    Acked-by: Daniel Vetter
    Signed-off-by: Greg Kroah-Hartman

    Jiri Kosina