xen: separate recipes for hypervisor and tools; switch to git as source

This change changes the names of many packages produced: the
xen-tools recipe now builds packages previous built by the xen
recipe, so the package prefix changes from "xen-" to "xen-tools-".
A temporary bbappend is provided for qemu to ease the transition.

Multiple motivations for recipe separation:
- improves efficiency of incremental build and development
- supports building the hypervisor and tools with different toolchains
  and for different architectures

Switch to using a git recipe on the Xen stable branch:
- enables easier tracking of critical XSA security updates applied
  upstream by just advancing SRCREV along the branch
Revision has been set to the tip of the stable-4.12 branch, which
has the one XSA-312 patch applied on top of RELEASE-4.12.2.

The recipe refactor externalizes the block tap components, to enable optional
building of blktap in a separate recipe outside xen-tools, needed by OpenXT.

xenstored is made a virtual package to support switching between
alternative implementations (several exist).

Update xen-image-minimal to install the xen-tools package, which
replaces what was previously xen-base.

Determine the flask policy filename, which is Xen-version specific,
using the same method as the Xen build system.

qemu: update PACKAGECONFIG[xen] for xen package renaming: allows builds
to continue correctly in the meantime while openembedded core and poky
are updated.

OpenXT ticket reference: OXT-1694

Signed-off-by: Christopher Clark <christopher.clark6@baesystems.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 8 insertions, 11 deletions

diff --git a/recipes-extended/xen/xen_git.bb b/recipes-extended/xen/xen_git.bb
index 5f950e6f..a7475ac3 100644
--- a/recipes-extended/xen/xen_git.bb
+++ b/recipes-extended/xen/xen_git.bb
@@ -1,18 +1,15 @@
-require xen.inc
+SRCREV ?= "a5fcafbfbee55261853fba07149c1c795f2baf58"
+
+XEN_REL ?= "4.12"
+XEN_BRANCH ?= "stable-${XEN_REL}"
 
-SRCREV ?= "cb70a26f78848fe45f593f7ebc9cfaac760a791b"
+SRC_URI = "git://xenbits.xen.org/xen.git;branch=${XEN_BRANCH}"
 
-XEN_REL = "4.13"
-XEN_BRANCH = "staging"
-FLASK_POLICY_FILE = "xenpolicy-${XEN_REL}-unstable"
+LIC_FILES_CHKSUM ?= "file://COPYING;md5=bbb4b1bdc2c3b6743da3c39d03249095"
 
 PV = "${XEN_REL}+git${SRCPV}"
 
 S = "${WORKDIR}/git"
 
-SRC_URI = " \
-    git://xenbits.xen.org/xen.git;branch=${XEN_BRANCH} \
-    file://0001-python-pygrub-pass-DISTUTILS-xen.4.12.patch \
-    "
-
-DEFAULT_PREFERENCE = "-1"
+require xen.inc
+require xen-hypervisor.inc