meta-rt: Initial PREEMPT_RT layer and kernel recipes

The meta-rt layer provides a preempt_rt kernel recipe
using the linux-yocto-stable git tree. It overrides
the virtual/kernel provider and defines the compatible
machines and per-machine SRCREVs. The initial layer
supports only qemux86-64.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Bruce Ashfield <bruce.ashfield@windriver.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/meta-rt/conf/layer.conf b/meta-rt/conf/layer.conf
new file mode 100644
index 0000000000..dbf4a326ba
--- /dev/null
+++ b/meta-rt/conf/layer.conf
@@ -0,0 +1,22 @@
+# Default to first disk/first partition
+RSP_ROOT ?= "sda1"
+
+# We have a conf and classes directory, add to BBPATH
+BBPATH := "${BBPATH}:${LAYERDIR}"
+
+# We have an images and various recipe-* directories, add to BBFILES
+BBFILES := "${BBFILES} ${LAYERDIR}/images/*.bb ${LAYERDIR}/images/*.bbappend ${LAYERDIR}/recipes-*/*.bb ${LAYERDIR}/recipes-*/*.bbappend"
+        
+BBFILE_COLLECTIONS += "rt"
+BBFILE_PATTERN_rt := "^${LAYERDIR}/"
+BBFILE_PRIORITY_rt = "8"
+
+# This layer builds images using a PREEMPT_RT kernel. Override any machine
+# specified kernel providers and leave it up to the kernel recipe to 
+# determine COMPATIBLE_MACHINE.
+PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-rt"
+
+# preempt_rt SRCREVs, one for meta, one per machine
+SRCREV_meta_pn-linux-yocto-rt ?= "50ccd2b3213b6a1bacb3f898c035119802dac420"
+SRCREV_machine_pn-linux-yocto-rt_qemux86-64 ?= "f49444f06875894389e640bcda6c3f6ceb1f0c3e"
+