Refactor kernel configuration fragment handling

Refactor the kernel configuration fragment handling to shift all AGL
applied configuration fragments into a new AGL_KCONFIG_FRAGMENTS
variable that is used to generate SRC_URI and KERNEL_CONFIG_FRAGMENTS
additions for the various BSPs.  The intent is to make it simple to
disable AGL provided configuration in downstream builds as the IC EG
has expressed as a requirement.  Additionally, the rework has allowed
for some clean up of accumulated cruft.

In practice, clearing AGL_KCONFIG_FRAGMENTS drops all non-BSP provided
kernel configuration with the exception of some qemu BSP related
additions required for AGL CI and some explicitly configurable things
like netboot support.

Notable changes:
- Instead of always using AGL's own fragment merging logic on top of
  the BSP kernel recipe, an effort is now made to leverage the BSP
  recipes' own merging schemes, so there are now separate include
  files for kernel-yocto.bbclass and plain kernel.bbclass based kernel
  recipes, as well as a common include file that defines the
  AGL_KCONFIG_FRAGMENTS variable and its derivations.  That file can
  be included directly in bbappends for BSP kernel recipes that use
  the KERNEL_CONFIG_FRAGMENTS scheme (e.g. meta-ti, meta-qcom).
- The SMACK enabling configuration in meta-app-framework has been
  updated to supply different fragments for enabling SMACK by default
  for 4.x and 5.x kernels.  This removes a warning from always
  supplying the old configuration, and allows providing a CONFIG_LSM
  definition to ensure over-riding any BSP modifications.
  This allows removing the previous hack to handle CONFIG_LSM being
  set in the defconfigs in linux-raspberrypi.
- By request, the linux-yocto support from meta-agl-bsp/meta-core has
  been rationalized into meta-agl-core to improve the experience when
  using meta-agl-core standalone for testing.
- All demo supporting kernel configuration has been removed, a
  subsequent change to meta-agl-demo will add it there by leveraging
  AGL_KCONFIG_FRAGMENTS.
- The hardware device support has been split out of the can-bus.cfg
  fragment, in favor of shifting it to meta-agl-demo.  A few other
  stray non-CAN configuration options have also been removed from
  can-bus.cfg, as they do not seem to be required.

Bug-AGL: SPEC-3983

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: If6662fd36e26cec767b1d53b1188a74d01ef9dcf
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26460
Reviewed-by: Hiroyuki Ishii <ishii.hiroyuki002@jp.panasonic.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account

6 files changed, 0 insertions, 62 deletions

diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/hciattach.cfg b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/hciattach.cfg
deleted file mode 100755
index c9c4fe2ed..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/hciattach.cfg
+++ /dev/null
@@ -1,17 +0,0 @@
-#
-# Bluetooth device drivers
-#
-CONFIG_BT_INTEL=m
-CONFIG_BT_BCM=m
-CONFIG_BT_RTL=m
-CONFIG_BT_HCIBTUSB=m
-CONFIG_BT_HCIBTUSB_BCM=y
-CONFIG_BT_HCIBTUSB_RTL=y
-CONFIG_BT_HCIUART=m
-CONFIG_BT_HCIUART_H4=y
-CONFIG_BT_HCIUART_BCSP=y
-
-#
-# USB port drivers
-#
-CONFIG_USB_SERIAL_CP210X=y
diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/most_deps.cfg b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/most_deps.cfg
deleted file mode 100644
index 15ddbd21e..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/most_deps.cfg
+++ /dev/null
@@ -1,9 +0,0 @@
-CONFIG_I2C=y
-CONFIG_USB=y
-CONFIG_MEDIA_SUPPORT=m
-CONFIG_MEDIA_CAMERA_SUPPORT=y
-CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y
-CONFIG_MEDIA_CONTROLLER=y
-CONFIG_VIDEO_DEV=m
-CONFIG_VIDEO_V4L2_SUBDEV_API=y
-CONFIG_VIDEO_V4L2=m
diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/qemuarm.cfg b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/qemuarm.cfg
deleted file mode 100644
index b3644b26f..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/qemuarm.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Necessary configs for using the virt qemu machine
-CONFIG_ARCH_MULTI_V7=y
-CONFIG_ARCH_VIRT=y
-CONFIG_SERIAL_AMBA_PL011=y
-CONFIG_PCI_HOST_GENERIC=y
-CONFIG_RTC_DRV_PL031=y
-# SPEC-3976 we mimic real AGL ARM board and they dont have LPAE. This cause also HDA failure.
-# CONFIG_ARM_LPAE is not set
diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/virtio.cfg b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/virtio.cfg
deleted file mode 100644
index d042d7d64..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto/virtio.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# qemu need a virtio storage for rootfs
-CONFIG_BLK_MQ_VIRTIO=y
-CONFIG_VIRTIO=y
-CONFIG_VIRTIO_BLK=y
-# qemuarm need virtionet
-CONFIG_VIRTIO_NET=y
diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_%.bbappend b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_%.bbappend
deleted file mode 100644
index 3d5903d85..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_%.bbappend
+++ /dev/null
@@ -1 +0,0 @@
-require ${@bb.utils.contains('AGL_FEATURES', 'aglcore', '${BPN}_agl.inc', '', d)}
diff --git a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_agl.inc b/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_agl.inc
deleted file mode 100644
index 30e656b17..000000000
--- a/meta-agl-bsp/meta-core/recipes-kernel/linux/linux-yocto_agl.inc
+++ /dev/null
@@ -1,21 +0,0 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/linux-yocto:"
-
-
-require recipes-kernel/linux/linux-agl.inc
-
-# Extra configuration options for the QEMU kernel
-SRC_URI += "file://hciattach.cfg \
-	    file://virtio.cfg \
-            "
-
-# Enable some things on qemuarm64 so MOST drivers will build and load.
-SRC_URI_append_qemuarm64 = " file://most_deps.cfg"
-
-# Configuration for using the virt machine (and not versatilepb)
-SRC_URI_append_qemuarm = " file://qemuarm.cfg"
-
-# Build a generic v7 kernel instead of the arm926j one that upstream
-# qemuarm defaults to.
-KBUILD_DEFCONFIG_qemuarm = "multi_v7_defconfig"
-KCONFIG_MODE = "--alldefconfig"
-