[PATCH 09/16] efi_loader: imply FAT, FAT_WRITE

[Heinrich Schuchardt]

On  March 31, 2020, 5:28 a.m. UTC Takahiro Akashi wrote:
 > On Fri, Mar 27, 2020 at 06:27:53AM +0100, Heinrich Schuchardt wrote:
 > > The UEFI spec requires support for the FAT file system.
 > >
 > > Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
 > > ---
 > >  lib/efi_loader/Kconfig | 2 ++
 > >  1 file changed, 2 insertions(+)
 > >
 > > diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
 > > index 9890144d41..e10ca05549 100644
 > > --- a/lib/efi_loader/Kconfig
 > > +++ b/lib/efi_loader/Kconfig
 > > @@ -15,6 +15,8 @@ config EFI_LOADER
 > >  	select HAVE_BLOCK_DEVICE
 > >  	select REGEX
 > >  	imply CFB_CONSOLE_ANSI
 > > +	imply FAT
 > > +	imply FAT_WRITE
 >
 > Obviously, this *imply* doesn't enforce enabling FAT.
 > If it is absolutely necessary, another measure should be taken.

If somebody wants to minimize the U-Boot size it might be necessary to
do without FAT_WRITE or FAT support.

 >
 > In addition, why do you treat FAT specifically here?
 > I remember that you insisted that other file system should be
 > allowed on U-Boot when I posted some patch.

An EFI system partition is always FAT formatted. So if we want to safe
U-Boot variables to the EFI system partition we require FAT.

Best regards

Heinrich

 >
 > -Takahiro Akashi
 >
 >
 > >  	imply USB_KEYBOARD_FN_KEYS
 > >  	imply VIDEO_ANSI
 > >  	help
 > > --
 > > 2.25.1