diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
index bfd4996..4e43cea 100644
--- a/PRESUBMIT.cfg
+++ b/PRESUBMIT.cfg
@@ -12,6 +12,9 @@
 # that live in this repository and are installed by packages.
 long_line_check: false
 
+# Make sure RELEASE_NOTE field is present.
+release_note_field_check: true
+
 [Hook Overrides Options]
 # Ignore VERSION file and table file
 cros_license_check:
diff --git a/eclass/cros-board.eclass b/eclass/cros-board.eclass
index c715fdf..a24e8cb 100644
--- a/eclass/cros-board.eclass
+++ b/eclass/cros-board.eclass
@@ -42,6 +42,7 @@
 	aplrvp
 	#app-shell-panther
 	aries
+	arion
 	arkham
 	arm-generic
 	#arm-generic_freon
@@ -109,6 +110,7 @@
 	cheza-freedreno
 	cheza64
 	cheza64-freedreno
+	chiron
 	#chronos
 	cid
 	clapper
diff --git a/eclass/cros-kernel2.eclass b/eclass/cros-kernel2.eclass
index e25f48f..2e3df8f 100644
--- a/eclass/cros-kernel2.eclass
+++ b/eclass/cros-kernel2.eclass
@@ -172,6 +172,7 @@
 	goldfish
 	highmem
 	hypervisor_guest
+	mellanox_eth
 	i2cdev
 	iioservice
 	irqsoff_tracer
@@ -229,6 +230,9 @@
 	wireless34
 	x32
 	xen_guest
+	hyperv_guest
+	ntfs_fs
+	cdrom
 )
 
 acpi_ac_desc="Enable ACPI AC"
@@ -430,6 +434,25 @@
 CONFIG_VIRTIO_VSOCKETS=m
 "
 
+mellanox_eth_desc="mellanox_eth"
+mellanox_eth_config="
+CONFIG_NET_VENDOR_MELLANOX=y
+CONFIG_MLX4_EN=m
+CONFIG_MLX4_CORE=m
+CONFIG_MLX4_DEBUG=y
+CONFIG_MLX4_CORE_GEN2=y
+CONFIG_MLX5_CORE=m
+# CONFIG_MLX5_FPGA is not set
+CONFIG_MLX5_CORE_EN=y
+CONFIG_MLX5_EN_ARFS=y
+CONFIG_MLX5_EN_RXNFC=y
+CONFIG_MLX5_MPFS=y
+# CONFIG_MLX5_CORE_IPOIB is not set
+# CONFIG_MLXSW_CORE is not set
+CONFIG_MLXFW=m
+"
+
+
 i2cdev_desc="I2C device interface"
 i2cdev_config="
 CONFIG_I2C_CHARDEV=y
@@ -956,6 +979,31 @@
 CONFIG_XEN_HAVE_VPMU=y
 "
 
+hyperv_guest_desc="Microsoft Hyper-V guest support"
+hyperv_guest_config="
+CONFIG_HYPERV=y
+CONFIG_HYPERV_NET=y
+CONFIG_HYPERV_TSCPAGE=y
+CONFIG_HYPERV_KEYBOARD=y
+CONFIG_HYPERV_STORAGE=y
+CONFIG_HYPERV_BALLOON=y
+CONFIG_HYPERV_UTILS=y
+CONFIG_HYPERV_TIMER=y
+CONFIG_HYPERV_IOMMU=y
+CONFIG_FB_HYPERV=y
+CONFIG_PCI_HYPERV=y
+"
+
+ntfs_fs_desc="Microsoft NTFS support"
+ntfs_fs_config="
+CONFIG_NTFS_FS=m
+"
+
+cdrom_desc="CDROM support"
+cdrom_config="
+CONFIG_BLK_DEV_SR=y
+"
+
 vtconsole_desc="VT console"
 vtconsole_config="
 CONFIG_VT=y