Eric Lee / smarc-fsl-linux-kernel

05 Jan, 2015

1 commit

  • 62c204ddf   fs: Make efivarfs a pseudo filesystem, built by default with EFI ... Browse Code »

    efivars is currently enabled under MISC_FILESYSTEMS, which is decribed
    as "such as filesystems that came from other operating systems".
    In reality, it is a pseudo filesystem, providing access to the kernel
    UEFI variable interface.

    Since this is the preferred interface for accessing UEFI variables, over
    the legacy efivars interface, also build it by default as a module if
    CONFIG_EFI.

    Signed-off-by: Leif Lindholm
    Signed-off-by: Matt Fleming

    Leif Lindholm
     

17 Apr, 2013

2 commits

  • a9499fa7c   efi: split efisubsystem from efivars ... Browse Code »

    This registers /sys/firmware/efi/{,systab,efivars/} whenever EFI is enabled
    and the system is booted with EFI.

    This allows
    *) userspace to check for the existence of /sys/firmware/efi as a way
    to determine whether or it is running on an EFI system.
    *) 'mount -t efivarfs none /sys/firmware/efi/efivars' without manually
    loading any modules.

    [ Also, move the efivar API into vars.c and unconditionally compile it.
    This allows us to move efivars.c, which now only contains the sysfs
    variable code, into the firmware/efi directory. Note that the efivars.c
    filename is kept to maintain backwards compatability with the old
    efivars.ko module. With this patch it is now possible for efivarfs
    to be built without CONFIG_EFI_VARS - Matt ]

    Cc: Seiji Aguchi
    Cc: Tony Luck
    Cc: Mike Waychison
    Cc: Kay Sievers
    Cc: Jeremy Kerr
    Cc: Matthew Garrett
    Cc: Chun-Yi Lee
    Cc: Andy Whitcroft
    Cc: Tobias Powalowski
    Signed-off-by: Tom Gundersen
    Signed-off-by: Matt Fleming

    Tom Gundersen
     
  • d68772b7c   efivarfs: Move to fs/efivarfs ... Browse Code »

    Now that efivarfs uses the efivar API, move it out of efivars.c and
    into fs/efivarfs where it belongs. This move will eventually allow us
    to enable the efivarfs code without having to also enable
    CONFIG_EFI_VARS built, and vice versa.

    Furthermore, things like,

    mount -t efivarfs none /sys/firmware/efi/efivars

    will now work if efivarfs is built as a module without requiring the
    use of MODULE_ALIAS(), which would have been necessary when the
    efivarfs code was part of efivars.c.

    Cc: Matthew Garrett
    Cc: Jeremy Kerr
    Reviewed-by: Tom Gundersen
    Tested-by: Tom Gundersen
    Signed-off-by: Matt Fleming

    Matt Fleming