diff --git a/src/mainboard/google/auron/Kconfig b/src/mainboard/google/auron/Kconfig
index a9039912db..10d9a35191 100644
--- a/src/mainboard/google/auron/Kconfig
+++ b/src/mainboard/google/auron/Kconfig
@@ -71,6 +71,9 @@ config MAINBOARD_PART_NUMBER
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/beltino/Kconfig b/src/mainboard/google/beltino/Kconfig
index 9f061c2aae..0b5be0d535 100644
--- a/src/mainboard/google/beltino/Kconfig
+++ b/src/mainboard/google/beltino/Kconfig
@@ -66,6 +66,9 @@ config MAINBOARD_FAMILY
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if !BOARD_GOOGLE_MONROE
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/brox/Kconfig b/src/mainboard/google/brox/Kconfig
index 44db591f32..45e989c8e5 100644
--- a/src/mainboard/google/brox/Kconfig
+++ b/src/mainboard/google/brox/Kconfig
@@ -213,6 +213,9 @@ config HAVE_WWAN_POWER_SEQUENCE
 config HAVE_PCIE_WWAN
 	def_bool n
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index 6a4082dfdf..707ffc9b4d 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -1186,6 +1186,10 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0xc60000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config HAVE_WWAN_POWER_SEQUENCE
 	def_bool n
 	help
diff --git a/src/mainboard/google/butterfly/Kconfig b/src/mainboard/google/butterfly/Kconfig
index 432374bb97..09ef13511b 100644
--- a/src/mainboard/google/butterfly/Kconfig
+++ b/src/mainboard/google/butterfly/Kconfig
@@ -35,6 +35,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Butterfly"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_VENDOR
 	string
 	default "Hewlett-Packard"
diff --git a/src/mainboard/google/dedede/Kconfig b/src/mainboard/google/dedede/Kconfig
index d6af56057d..7e470d6b87 100644
--- a/src/mainboard/google/dedede/Kconfig
+++ b/src/mainboard/google/dedede/Kconfig
@@ -310,6 +310,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-dedede-16MiB.fmd" if CHROMEOS && BOARD_ROMSIZE_KB_16384
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-dedede-32MiB.fmd" if CHROMEOS && BOARD_ROMSIZE_KB_32768
 
+config CBFS_SIZE
+	default 0xc7f000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config MAINBOARD_DIR
 	default "google/dedede"
 
diff --git a/src/mainboard/google/drallion/Kconfig b/src/mainboard/google/drallion/Kconfig
index 34c9da5a8e..1353447ee2 100644
--- a/src/mainboard/google/drallion/Kconfig
+++ b/src/mainboard/google/drallion/Kconfig
@@ -98,4 +98,7 @@ config VBOOT
 config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/default.fmd" if !CHROMEOS
 
+config CBFS_SIZE
+	default 0x1000000
+
 endif # BOARD_GOOGLE_BASEBOARD_DRALLION
diff --git a/src/mainboard/google/eve/Kconfig b/src/mainboard/google/eve/Kconfig
index b473d502bf..cd4c5ad5e6 100644
--- a/src/mainboard/google/eve/Kconfig
+++ b/src/mainboard/google/eve/Kconfig
@@ -74,6 +74,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 endif
diff --git a/src/mainboard/google/fatcat/Kconfig b/src/mainboard/google/fatcat/Kconfig
index 15b149b226..20889dbdf0 100644
--- a/src/mainboard/google/fatcat/Kconfig
+++ b/src/mainboard/google/fatcat/Kconfig
@@ -244,6 +244,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 
diff --git a/src/mainboard/google/fizz/Kconfig b/src/mainboard/google/fizz/Kconfig
index d07ce2ff10..daaf81410a 100644
--- a/src/mainboard/google/fizz/Kconfig
+++ b/src/mainboard/google/fizz/Kconfig
@@ -102,6 +102,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 
diff --git a/src/mainboard/google/glados/Kconfig b/src/mainboard/google/glados/Kconfig
index 6786d1b5f1..746e326c04 100644
--- a/src/mainboard/google/glados/Kconfig
+++ b/src/mainboard/google/glados/Kconfig
@@ -128,6 +128,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config CONSOLE_SERIAL
 	bool
 	default n
diff --git a/src/mainboard/google/hatch/Kconfig b/src/mainboard/google/hatch/Kconfig
index 1336c65eed..1f9a7d2eb0 100644
--- a/src/mainboard/google/hatch/Kconfig
+++ b/src/mainboard/google/hatch/Kconfig
@@ -125,6 +125,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-16MiB.fmd" if BOARD_ROMSIZE_KB_16384 && CHROMEOS
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-32MiB.fmd" if BOARD_ROMSIZE_KB_32768 && CHROMEOS
 
+config CBFS_SIZE
+	default 0xc00000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config MAINBOARD_DIR
 	default "google/hatch"
 
diff --git a/src/mainboard/google/jecht/Kconfig b/src/mainboard/google/jecht/Kconfig
index 0ced2cd61d..0edbf5ebab 100644
--- a/src/mainboard/google/jecht/Kconfig
+++ b/src/mainboard/google/jecht/Kconfig
@@ -55,6 +55,9 @@ config MAINBOARD_PART_NUMBER
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if !BOARD_GOOGLE_TIDUS
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/kahlee/Kconfig b/src/mainboard/google/kahlee/Kconfig
index b3fb71a04e..157c317a62 100644
--- a/src/mainboard/google/kahlee/Kconfig
+++ b/src/mainboard/google/kahlee/Kconfig
@@ -103,6 +103,9 @@ config FMDFILE
 	  but in some cases more complex setups are required.
 	  When an fmd is specified, it overrides the default format.
 
+config CBFS_SIZE
+	default 0x1000000
+
 config MAX_CPUS
 	int
 	default 4
diff --git a/src/mainboard/google/link/Kconfig b/src/mainboard/google/link/Kconfig
index df85382246..ab889f1c24 100644
--- a/src/mainboard/google/link/Kconfig
+++ b/src/mainboard/google/link/Kconfig
@@ -38,6 +38,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Link"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/ocelot/Kconfig b/src/mainboard/google/ocelot/Kconfig
index b20ef17289..d5e37c742f 100644
--- a/src/mainboard/google/ocelot/Kconfig
+++ b/src/mainboard/google/ocelot/Kconfig
@@ -210,6 +210,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n
 
diff --git a/src/mainboard/google/parrot/Kconfig b/src/mainboard/google/parrot/Kconfig
index dc0e8606fe..2fa7420a14 100644
--- a/src/mainboard/google/parrot/Kconfig
+++ b/src/mainboard/google/parrot/Kconfig
@@ -36,6 +36,9 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Parrot"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/poppy/Kconfig b/src/mainboard/google/poppy/Kconfig
index ac9aa54e56..cef94552f7 100644
--- a/src/mainboard/google/poppy/Kconfig
+++ b/src/mainboard/google/poppy/Kconfig
@@ -225,6 +225,9 @@ config UART_FOR_CONSOLE
 	int
 	default 2
 
+config CBFS_SIZE
+	default 0xe00000
+
 config USE_PM_ACPI_TIMER
 	default n
 
diff --git a/src/mainboard/google/puff/Kconfig b/src/mainboard/google/puff/Kconfig
index 2ec9d996b9..ebf9ea523b 100644
--- a/src/mainboard/google/puff/Kconfig
+++ b/src/mainboard/google/puff/Kconfig
@@ -120,6 +120,10 @@ config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-16MiB.fmd" if BOARD_ROMSIZE_KB_16384 && CHROMEOS
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos-32MiB.fmd" if BOARD_ROMSIZE_KB_32768 && CHROMEOS
 
+config CBFS_SIZE
+	default 0xd00000 if BOARD_ROMSIZE_KB_16384
+	default 0x1000000 if BOARD_ROMSIZE_KB_32768
+
 config POWER_OFF_ON_CR50_UPDATE
 	bool
 	default n
diff --git a/src/mainboard/google/rambi/Kconfig b/src/mainboard/google/rambi/Kconfig
index ccdc02a45c..399872e230 100644
--- a/src/mainboard/google/rambi/Kconfig
+++ b/src/mainboard/google/rambi/Kconfig
@@ -146,6 +146,9 @@ config MAINBOARD_PART_NUMBER
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index f9afd38141..b5f8858033 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -259,6 +259,9 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x1000000
+
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
diff --git a/src/mainboard/google/sarien/Kconfig b/src/mainboard/google/sarien/Kconfig
index dcf94470ec..d4f5171d61 100644
--- a/src/mainboard/google/sarien/Kconfig
+++ b/src/mainboard/google/sarien/Kconfig
@@ -110,4 +110,7 @@ config VBOOT
 config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/default.fmd" if !CHROMEOS
 
+config CBFS_SIZE
+	default 0x1000000
+
 endif # BOARD_GOOGLE_BASEBOARD_SARIEN
diff --git a/src/mainboard/google/slippy/Kconfig b/src/mainboard/google/slippy/Kconfig
index 380ed9fe72..5420557d82 100644
--- a/src/mainboard/google/slippy/Kconfig
+++ b/src/mainboard/google/slippy/Kconfig
@@ -71,6 +71,9 @@ config OVERRIDE_DEVICETREE
 config INTEL_GMA_VBT_FILE
 	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/stout/Kconfig b/src/mainboard/google/stout/Kconfig
index 2c354419d8..25add1b340 100644
--- a/src/mainboard/google/stout/Kconfig
+++ b/src/mainboard/google/stout/Kconfig
@@ -38,6 +38,9 @@ config VGA_BIOS_ID
 	string
 	default "8086,0156"
 
+config CBFS_SIZE
+	default 0x600000
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"
diff --git a/src/mainboard/google/volteer/Kconfig b/src/mainboard/google/volteer/Kconfig
index 872d28540e..dc586f1538 100644
--- a/src/mainboard/google/volteer/Kconfig
+++ b/src/mainboard/google/volteer/Kconfig
@@ -245,6 +245,9 @@ config VARIANT_DIR
 	default "volteer2" if BOARD_GOOGLE_VOLTEER2_TI50
 	default "voxel" if BOARD_GOOGLE_VOXEL
 
+config CBFS_SIZE
+	default 0x1000000
+
 config USE_PM_ACPI_TIMER
 	default n