Bug #432956: Easy to include VirtIO support in kernel.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

ChangeLog

@@ -5,6 +5,10 @@
 # Distributed under the GPL v2
 # $Id$
 
+  14 Oct 2012; Robin H. Johnson <robbat2@gentoo.org> gen_cmdline.sh,
+  gen_configkernel.sh, gen_determineargs.sh:
+  Bug #432956: Easy to include VirtIO support in kernel.
+
   13 Oct 2012; Robin H. Johnson <robbat2@gentoo.org> arch/alpha/modules_load,
   arch/arm/modules_load, arch/ia64/modules_load, arch/mips/modules_load,
   arch/parisc/modules_load, arch/parisc64/modules_load, arch/ppc/modules_load,

gen_cmdline.sh

@@ -31,6 +31,7 @@ longusage() {
   echo "	--no-xconfig		Don't run xconfig after oldconfig"
   echo "	--save-config		Save the configuration to /etc/kernels"
   echo "	--no-save-config	Don't save the configuration to /etc/kernels"
+  echo "	--virtio			Include VirtIO kernel code"
   echo "  Kernel Compile settings"
   echo "	--oldconfig		Implies --no-clean and runs a 'make oldconfig'"
   echo "	--clean			Run make clean before compilation"
@@ -321,6 +322,10 @@ parse_cmdline() {
 			CMD_ZFS=`parse_optbool "$*"`
 			print_info 2 "CMD_ZFS: ${CMD_ZFS}"
 			;;
+		--virtio)
+			CMD_VIRTIO=`parse_optbool "$*"`
+			print_info 2 "CMD_VIRTIO: ${CMD_VIRTIO}"
+			;;
 		--multipath|--no-multipath)
 			CMD_MULTIPATH=`parse_optbool "$*"`
 			if [ "$CMD_MULTIPATH" = "1" -a ! -e /usr/include/libdevmapper.h ]

gen_configkernel.sh

@@ -147,4 +147,17 @@ config_kernel() {
 	then
 		sed -i ${KERNEL_OUTPUTDIR}/.config -e 's/#\? \?CONFIG_FB_SPLASH is.*/CONFIG_FB_SPLASH=y/g'
 	fi
+	
+	# VirtIO
+	if isTrue ${CMD_VIRTIO} 
+	then 
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_PARAVIRT_GUEST.*/CONFIG_PARAVIRT_GUEST=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VIRTIO_PCI.*/CONFIG_VIRTIO_PCI=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VIRTIO_BALLOON.*/CONFIG_VIRTIO_BALLOON=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VIRTIO_MMIO.*/CONFIG_VIRTIO_MMIO=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VIRTIO_BLK.*/CONFIG_VIRTIO_BLK=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_SCSI_VIRTIO.*/CONFIG_SCSI_VIRTIO=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VIRTIO_NET.*/CONFIG_VIRTIO_NET=y/g'
+		sed -i ${KERNEL_DIR}/.config -e 's/#\? \?CONFIG_VHOST_NET.*/CONFIG_VHOST_NET=y/g'
+	fi 
 }

gen_determineargs.sh

@@ -125,6 +125,7 @@ determine_real_args() {
 	set_config_with_override STRING MDADM_CONFIG         CMD_MDADM_CONFIG
 	set_config_with_override BOOL   E2FSPROGS            CMD_E2FSPROGS            "no"
 	set_config_with_override BOOL   ZFS                  CMD_ZFS
+	set_config_with_override BOOL   VIRTIO               CMD_VIRTIO				  "no"
 	set_config_with_override BOOL   MULTIPATH            CMD_MULTIPATH
 	set_config_with_override BOOL   FIRMWARE             CMD_FIRMWARE
 	set_config_with_override STRING FIRMWARE_DIR         CMD_FIRMWARE_DIR         "/lib/firmware"