arm-autonomy: Create arm-autonomy-guest feature

Introduce DISTRO_FEATURE arm-autonomy-guest which is:
- enabling ipv4 in distro features
- enabling xen frontend driver in the linux kernel using a kernel
feature
- enabling console over hvc0

Change-Id: Idd9a708799b35e483dbba22279ce677d9674ef09
Issue-Id: SCM-767
Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/README.md

@@ -23,6 +23,12 @@ This layer is adding the following Yocto DISTRO_FEATURES:
   - add 'xen' and 'ipv4' to DISTRO_FEATURES.
   - add xen backend drivers to linux kernel configuration.
 
+* arm-autonomy-guest: this feature activates functionalities to run as guest
+  of an autonomy system. It is doing the following:
+  - add 'ipv4' to DISTRO_FEATURES.
+  - add xen frontend drivers to linux kernel configuration.
+  - add console on hvc0 during init.
+
 Bitbake variables
 -----------------
 Some recipes and classes in this layer are introducing variables which can be

meta-arm-autonomy/classes/arm-autonomy-features.bbclass

@@ -1,4 +1,5 @@
 # Include arm-autonomy distro config files if the distro features are set
 
 require ${@bb.utils.contains('DISTRO_FEATURES', 'arm-autonomy-host', '${ARM_AUTONOMY_DISTRO_CFGDIR}/arm-autonomy-host.inc', '', d)}
+require ${@bb.utils.contains('DISTRO_FEATURES', 'arm-autonomy-guest', '${ARM_AUTONOMY_DISTRO_CFGDIR}/arm-autonomy-guest.inc', '', d)}
 

meta-arm-autonomy/conf/distro/include/arm-autonomy-guest.inc

@@ -0,0 +1,5 @@
+# This files is added when DISTRO_FEATURES contains arm-autonomy-guest
+
+# We need to have ipv4 activated
+DISTRO_FEATURES_append = " ipv4"
+

meta-arm-autonomy/recipes-core/sysvinit/sysvinit-inittab_2.%.bbappend

@@ -0,0 +1,16 @@
+# if arm-autonomy-guest is activated, we are running as a xen guest so we must
+# have a console on hvc0
+# This is normally done in meta-virtualization if xen is activated but here
+# we don't have xen activated.
+#
+
+SYSVINIT_ADDHVC0 = "${@bb.utils.contains('DISTRO_FEATURES', \
+    'arm-autonomy-guest', 'true', 'false', d)}"
+
+do_install_append() {
+    if ${SYSVINIT_ADDHVC0}; then
+        echo "" >> ${D}${sysconfdir}/inittab
+        echo "X0:12345:respawn:/sbin/getty 115200 hvc0" >> \
+            ${D}${sysconfdir}/inittab
+    fi
+}

meta-arm-autonomy/recipes-kernel/linux/arm-autonomy-kmeta/features/arm-autonomy/xen-guest.cfg

@@ -0,0 +1,54 @@
+CONFIG_PARAVIRT=y
+CONFIG_XEN=y
+
+CONFIG_BLOCK=y
+CONFIG_XEN_BLKDEV_FRONTEND=y
+
+CONFIG_SCSI=y
+CONFIG_XEN_SCSI_FRONTEND=y
+
+CONFIG_NET=y
+CONFIG_XEN_NETDEV_FRONTEND=y
+
+CONFIG_INPUT=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
+
+CONFIG_HVC_IRQ=y
+
+CONFIG_HVC_XEN=y
+CONFIG_HVC_XEN_FRONTEND=y
+
+CONFIG_WATCHDOG=y
+CONFIG_XEN_WDT=y
+
+CONFIG_FB_SYS_FILLRECT=y
+CONFIG_FB_SYS_COPYAREA=y
+CONFIG_FB_SYS_IMAGEBLIT=y
+CONFIG_FB_SYS_FOPS=y
+CONFIG_FB_DEFERRED_IO=y
+CONFIG_XEN_FBDEV_FRONTEND=y
+
+CONFIG_XEN_BALLOON=y
+
+CONFIG_XEN_DEV_EVTCHN=y
+
+CONFIG_XENFS=y
+CONFIG_XEN_COMPAT_XENFS=y
+
+CONFIG_XEN_SYS_HYPERVISOR=y
+CONFIG_XEN_XENBUS_FRONTEND=y
+CONFIG_XEN_GNTDEV=y
+CONFIG_XEN_GRANT_DEV_ALLOC=y
+CONFIG_SWIOTLB_XEN=y
+
+CONFIG_XEN_EFI=y
+CONFIG_XEN_AUTO_XLATE=y
+
+CONFIG_DRM=y
+CONFIG_DRM_XEN=y
+CONFIG_DRM_XEN_FRONTEND=y
+
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_XEN_FRONTEND=y

meta-arm-autonomy/recipes-kernel/linux/arm-autonomy-kmeta/features/arm-autonomy/xen-guest.scc

@@ -0,0 +1,4 @@
+define KFEATURE_DESCRIPTION "Enable XEN Guest Frontend Drivers"
+
+kconf non-hardware xen-guest.cfg
+

meta-arm-autonomy/recipes-kernel/linux/linux-arm-autonomy.inc

@@ -11,3 +11,6 @@ SRC_URI_append = " file://arm-autonomy-kmeta;type=kmeta;name=arm-autonomy-kmeta;
 KERNEL_FEATURES += "${@bb.utils.contains('DISTRO_FEATURES', \
         'arm-autonomy-host', 'features/arm-autonomy/xen-host.scc', '', d)}"
 
+# Add xen guest drivers to kernel if arm-autonomy-guest is activated
+KERNEL_FEATURES += "${@bb.utils.contains('DISTRO_FEATURES', \
+        'arm-autonomy-guest', 'features/arm-autonomy/xen-guest.scc', '', d)}"