docs/luks2: Mention key derivation function support

To give users hint why Argon2, the default in cryptsetup for LUKS2, does
not work.

Signed-off-by: Petr Vorel <pvorel@suse.cz>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Patrick Steinhardt <ps@pks.im>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

diff --git a/docs/grub.texi b/docs/grub.texi
index cb5fe6e08e01e6ded2f083c0284914777e3bd29b..eeb3118ebdec2c49373dcc28a1ab875b92a5789e 100644 (file)
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4305,7 +4305,8 @@ devices; option @option{-b} configures all geli containers that have boot flag s
 
 GRUB suports devices encrypted using LUKS, LUKS2 and geli. Note that necessary
 modules (@var{luks}, @var{luks2} and @var{geli}) have to be loaded manually
-before this command can be used.
+before this command can be used. For LUKS2 only the PBKDF2 key derivation
+function is supported, as Argon2 is not yet supported.
 @end deffn
 
 @node cutmem