diff --git a/src/mainboard/google/kukui/Kconfig b/src/mainboard/google/kukui/Kconfig
index fa8099e6bd..6714b442fa 100644
--- a/src/mainboard/google/kukui/Kconfig
+++ b/src/mainboard/google/kukui/Kconfig
@@ -6,11 +6,12 @@ config VBOOT
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select SOC_MEDIATEK_MT8183
-	select BOARD_ROMSIZE_KB_4096
+	select BOARD_ROMSIZE_KB_8192
 	select MAINBOARD_HAS_CHROMEOS
 	select COMMON_CBFS_SPI_WRAPPER
 	select SPI_FLASH
 	select FATAL_ASSERTS
+	select SPI_FLASH_INCLUDE_ALL_DRIVERS
 
 config MAINBOARD_DIR
 	string
@@ -20,4 +21,8 @@ config MAINBOARD_PART_NUMBER
 	string
 	default "Kukui"
 
+config BOOT_DEVICE_SPI_FLASH_BUS
+	int
+	default 1
+
 endif
diff --git a/src/mainboard/google/kukui/Makefile.inc b/src/mainboard/google/kukui/Makefile.inc
index e474212bf6..290be4cf0e 100644
--- a/src/mainboard/google/kukui/Makefile.inc
+++ b/src/mainboard/google/kukui/Makefile.inc
@@ -1,3 +1,4 @@
+bootblock-y += bootblock.c
 bootblock-y += memlayout.ld
 decompressor-y += memlayout.ld
 
diff --git a/src/mainboard/google/kukui/bootblock.c b/src/mainboard/google/kukui/bootblock.c
new file mode 100644
index 0000000000..79f20a3a58
--- /dev/null
+++ b/src/mainboard/google/kukui/bootblock.c
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <bootblock_common.h>
+#include <soc/spi.h>
+
+void bootblock_mainboard_init(void)
+{
+	mtk_spi_init(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, SPI_PAD0_MASK, 26 * MHz);
+}
diff --git a/src/mainboard/google/kukui/chromeos.fmd b/src/mainboard/google/kukui/chromeos.fmd
index 9c618e3cdf..a521b0c1a3 100644
--- a/src/mainboard/google/kukui/chromeos.fmd
+++ b/src/mainboard/google/kukui/chromeos.fmd
@@ -1,4 +1,4 @@
-FLASH@0x0 0x400000 {
+FLASH@0x0 0x800000 {
 	WP_RO@0x0 0x200000 {
 		RO_SECTION@0x0 0x1f0000 {
 			BOOTBLOCK@0 128K