diff -Nru partman-crypto-109/debian/changelog partman-crypto-110/debian/changelog
--- partman-crypto-109/debian/changelog	2020-09-20 20:50:54.000000000 +0000
+++ partman-crypto-110/debian/changelog	2020-10-01 21:28:49.000000000 +0000
@@ -1,3 +1,12 @@
+partman-crypto (110) unstable; urgency=medium
+
+  * Add preseed option 'partman-crypto/luksformat_options' to
+    provide more options for 'cryptsetup luksFormat' (Closes: #)
+    - d/partman-crypto.templates: add preseed option.
+    - lib/crypto-base.sh: check for, log, and use it.
+
+ -- Mauricio Faria de Oliveira <mfo@canonical.com>  Thu, 01 Oct 2020 18:28:49 -0300
+
 partman-crypto (109) unstable; urgency=medium
 
   * Team upload
diff -Nru partman-crypto-109/debian/partman-crypto.templates partman-crypto-110/debian/partman-crypto.templates
--- partman-crypto-109/debian/partman-crypto.templates	2018-08-10 19:23:50.000000000 +0000
+++ partman-crypto-110/debian/partman-crypto.templates	2020-10-01 21:28:49.000000000 +0000
@@ -488,3 +488,8 @@
 # :sl3:
 _Description: No devices selected
  No devices were selected for encryption.
+
+Template: partman-crypto/luksformat_options
+Type: string
+Description: for internal use; can be preseeded.
+ Provide additional options to the cryptsetup luksFormat command.
diff -Nru partman-crypto-109/lib/crypto-base.sh partman-crypto-110/lib/crypto-base.sh
--- partman-crypto-109/lib/crypto-base.sh	2018-08-10 19:23:50.000000000 +0000
+++ partman-crypto-110/lib/crypto-base.sh	2020-10-01 21:28:49.000000000 +0000
@@ -205,7 +205,7 @@
 }
 
 setup_luks () {
-	local mapping device cipher iv size pass
+	local mapping device cipher iv size pass luksopts
 	mapping=$1
 	device=$2
 	cipher=$3
@@ -219,8 +219,13 @@
 	# xts modes needs double the key size
 	[ "${iv%xts-*}" = "${iv}" ] || size="$(($size * 2))"
 
+	if db_get partman-crypto/luksformat_options; then
+		luksopts="$RET"
+		log "Additional options for luksFormat: '$luksopts'"
+	fi
+
 	log-output -t partman-crypto \
-	/sbin/cryptsetup -c $cipher-$iv -h $hash -s $size luksFormat $device $pass
+	/sbin/cryptsetup -c $cipher-$iv -h $hash -s $size $luksopts luksFormat $device $pass
 	if [ $? -ne 0 ]; then
 		log "luksFormat failed"
 		return 2