INITRD var: make it a list of filesystem images

The initrd image used by the Linux kernel is list of file system images
concatenated together and presented as a single initrd file at boot time.

So far the initrd is a single filesystem image. But in cases like to support
early microcode loading, the initrd image need to have multiple filesystem
images concatenated together.

This commit is extending the INITRD variable from a single filesystem image
to a list of filesystem images to satisfy the need mentioned above.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/boot-directdisk.bbclass b/meta/classes/boot-directdisk.bbclass
index 0da9932f4fbeaf5de1428a785eb6ca01a9d76081..995d3e7fc68e94094c39d17d9184cdaf15442c96 100644 (file)
--- a/meta/classes/boot-directdisk.bbclass
+++ b/meta/classes/boot-directdisk.bbclass
@@ -71,10 +71,17 @@ boot_direct_populate() {
        # Install bzImage, initrd, and rootfs.img in DEST for all loaders to use.
        install -m 0644 ${STAGING_KERNEL_DIR}/bzImage $dest/vmlinuz
 
-       if [ -n "${INITRD}" ] && [ -s "${INITRD}" ]; then
-               install -m 0644 ${INITRD} $dest/initrd
+       # initrd is made of concatenation of multiple filesystem images
+       if [ -n "${INITRD}" ]; then
+               rm -f $dest/initrd
+               for fs in ${INITRD}
+               do
+                       if [ -n "${fs}" ] && [ -s "${fs}" ]; then
+                               cat ${fs} >> $dest/initrd
+                       fi
+               done
+               chmod 0644 $dest/initrd
        fi
-
 }
 
 build_boot_dd() {

diff --git a/meta/classes/bootimg.bbclass b/meta/classes/bootimg.bbclass
index d52aacea8193dc4c65de497357fc16e9acf31a41..7b3ce6591058efed7061e54ac1b4f2d097ee1c24 100644 (file)
--- a/meta/classes/bootimg.bbclass
+++ b/meta/classes/bootimg.bbclass
@@ -18,7 +18,7 @@
 # an hdd)
 
 # External variables (also used by syslinux.bbclass)
-# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
+# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
 # ${COMPRESSISO} - Transparent compress ISO, reduce size ~40% if set to 1
 # ${NOISO}  - skip building the ISO image if set to 1
 # ${NOHDD}  - skip building the HDD image if set to 1
@@ -67,9 +67,17 @@ populate() {
 
        # Install bzImage, initrd, and rootfs.img in DEST for all loaders to use.
        install -m 0644 ${STAGING_KERNEL_DIR}/bzImage ${DEST}/vmlinuz
-
-       if [ -n "${INITRD}" ] && [ -s "${INITRD}" ]; then
-               install -m 0644 ${INITRD} ${DEST}/initrd
+       
+       # initrd is made of concatenation of multiple filesystem images
+       if [ -n "${INITRD}" ]; then
+               rm -f ${DEST}/initrd
+               for fs in ${INITRD}
+               do
+                       if [ -s "${fs}" ]; then
+                               cat ${fs} >> ${DEST}/initrd
+                       fi
+               done
+               chmod 0644 ${DEST}/initrd
        fi
 
        if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
@@ -80,10 +88,19 @@ populate() {
 
 build_iso() {
        # Only create an ISO if we have an INITRD and NOISO was not set
-       if [ -z "${INITRD}" ] || [ ! -s "${INITRD}" ] || [ "${NOISO}" = "1" ]; then
+       if [ -z "${INITRD}" ] || [ "${NOISO}" = "1" ]; then
                bbnote "ISO image will not be created."
                return
        fi
+       # ${INITRD} is a list of multiple filesystem images
+       for fs in ${INITRD}
+       do
+               if [ ! -s "${fs}" ]; then
+                       bbnote "ISO image will not be created. ${fs} is invalid."
+                       return
+               fi
+       done
+
 
        populate ${ISODIR}
 

diff --git a/meta/classes/grub-efi.bbclass b/meta/classes/grub-efi.bbclass
index 505d032cc8b8d032ff5c305ab7d2f660d8e715c0..47bd35e04947a644c6f6262be624b2edea425e48 100644 (file)
--- a/meta/classes/grub-efi.bbclass
+++ b/meta/classes/grub-efi.bbclass
@@ -7,7 +7,7 @@
 # Provide grub-efi specific functions for building bootable images.
 
 # External variables
-# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
+# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
 # ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
 # ${GRUB_GFXSERIAL} - set this to 1 to have graphics and serial in the boot menu
 # ${LABELS} - a list of targets for the automatic config

diff --git a/meta/classes/syslinux.bbclass b/meta/classes/syslinux.bbclass
index b9701bf237aed1e7d805c705fa0eb215003072f4..d6498d98bb3ebe593b2356f8a8030b18b7c57960 100644 (file)
--- a/meta/classes/syslinux.bbclass
+++ b/meta/classes/syslinux.bbclass
@@ -5,7 +5,7 @@
 # Provide syslinux specific functions for building bootable images.
 
 # External variables
-# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
+# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
 # ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
 # ${AUTO_SYSLINUXMENU} - set this to 1 to enable creating an automatic menu
 # ${LABELS} - a list of targets for the automatic config

diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 7fa3f318b959a3a1bfefe6ffb98296e66fa4878a..31fbd6c43b009e861c5e0494bb97ea8dbd3f6888 100644 (file)
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -225,7 +225,7 @@ INHIBIT_PACKAGE_STRIP[doc] = "If set to "1", causes the build to not strip binar
 INHERIT[doc] = "Causes the named class to be inherited at this point during parsing. The variable is only valid in configuration files."
 INHERIT_DISTRO[doc] = "Lists classes that will be inherited at the distribution level. It is unlikely that you want to edit this variable."
 INITRAMFS_FSTYPES[doc] = "Defines the format for the output image of an initial RAM disk (initramfs), which is used during boot."
-INITRD[doc] = "Indicates a filesystem image to use as an initial RAM disk (initrd)."
+INITRD[doc] = "Indicates list of filesystem images to concatenate and use as an initial RAM disk (initrd)."
 INITSCRIPT_NAME[doc] = "The filename of the initialization script as installed to ${sysconfdir}/init.d."
 INITSCRIPT_PACKAGES[doc] = "A list of the packages that contain initscripts. This variable is used in recipes when using update-rc.d.bbclass. The variable is optional and defaults to the PN variable."
 INITSCRIPT_PARAMS[doc] = "Specifies the options to pass to update-rc.d. The variable is mandatory and is used in recipes when using update-rc.d.bbclass."