uxen-guest-tools, image: package the Linux VM tools for uXen hypervisor

uXen is a type-2 Open Source hypervisor from Bromium/HP.
    https://www.bromium.com/opensource/

This adds packaging for the Linux guest support software, enabling OE
to produce VM images to run on the uXen hypervisor.

    uxen-guest-tools: in-guest software device drivers
    uxen-guest-image-minimal : minimal core image with uXen drivers

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

recipes-extended/images/uxen-guest-image-minimal.bb

@@ -0,0 +1,9 @@
+DESCRIPTION = "A Linux guest image for the uXen type-2 hypervisor."
+LICENSE = "MIT"
+
+inherit core-image
+
+IMAGE_INSTALL += " \
+    packagegroup-core-boot \
+    uxen-guest-tools \
+    "

recipes-extended/uxen/README.md

@@ -0,0 +1,48 @@
+# uXen : Open Source type-2 hypervisor support
+
+For any issues with the uXen recipes please make sure you CC:
+
+    christopher.w.clark@gmail.com
+
+## uxen-guest-tools : software for within guest VMs, kernel modules
+
+* uxenhc        : hypercall driver
+* uxenfb        : framebuffer driver
+* uxenhid       : Human Input Device driver
+* uxennet       : virtual network device driver
+* uxenplatform  : uXen platform device driver
+* uxenstor      : virtual storage device driver
+* uxenv4vlib    : v4v, Hypervisor-Mediated data eXchange
+* v4vvsock      : v4v vsock virtual network device driver
+* v4vtest       : basic v4v vsock test
+
+To produce a bootable VM disk image file:
+
+    wic create directdisk -e uxen-guest-image-minimal
+
+To test, copy the .direct file that wic produces to the host with uXen installed and write the following to a new file: `linux-vm.json`. Update the file path within it to point to your wic-generated disk image:
+
+    {
+      "name" : "Linux Virtual Machine",
+      "boot-order" : "c",
+      "block" :
+        { "id": "ich0", "proto" : "raw", "xsnapshot" : true,
+          "path" : "c:/Users/Yocto/directdisk-202001010100-sda.direct" },
+      "memory" : 768,
+      "net" : { "type" : "nic", "model" : "e1000" },
+      "hpet" : 1,
+      "vcpus" : 1,
+      "use-v4v-net" : 1,
+      "v4v-storage" : true,
+
+      "" : ""
+    }
+
+and then boot it:
+
+    uxendm -F linux-vm.json
+
+References:
+  https://www.bromium.com/opensource
+  https://github.com/uxen-virt
+  https://www.platformsecuritysummit.com/2018/speaker/pratt/

recipes-extended/uxen/uxen-guest-tools/fix-Makefile-for-OE-kernel-build.patch

@@ -0,0 +1,36 @@
+# OpenEmbedded uses KERNEL_SRC instead of KDIR
+# and enable the modules_install target.
+# Signed-off-by: Christopher Clark <christopher.clark6@baesystems.com>
+diff --git a/Makefile b/Makefile
+index 3fd3075..80cf0fe 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,10 +1,13 @@
+ ifneq ($(KERNELRELEASE),)
+ # kbuild part of makefile
+-else
++include Kbuild
+ 
+-KVERSION ?= $(shell uname -r)
+-KDIR := /lib/modules/${KVERSION}/build
++else
++#normal makefile
++KERNEL_VERSION ?= $(shell uname -r)
++KERNEL_SRC ?= /lib/modules/${KERNEL_VERSION}/build
+ UXENDIR ?= $(shell pwd)/include/uxen
++INSTALL_HDR_PATH ?= /usr
+ 
+ LX_TARGET_FLAGS= -DLX_TARGET_STANDARDVM
+ LX_TARGET_ATTOVM=n
+@@ -19,7 +22,9 @@ EXTRA_CFLAGS=$(LX_TARGET_FLAGS) -g -Wall
+ NOSTDINC_FLAGS=-I$(shell pwd)/include/ -I$(UXENDIR) -I$(UXENDIR)/xen
+ 
+ all:
+-	make -C $(KDIR) $(LX_TARGET) M=$(shell pwd) EXTRA_CFLAGS="$(EXTRA_CFLAGS)" NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)"
++	make -C $(KERNEL_SRC) $(LX_TARGET) M=$(shell pwd) EXTRA_CFLAGS="$(EXTRA_CFLAGS)" NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)"
+ clean:
+-	make -C $(KDIR) $(LX_TARGET) M=$(shell pwd) clean
++	make -C $(KERNEL_SRC) $(LX_TARGET) M=$(shell pwd) clean
++modules_install:
++	make -C $(KERNEL_SRC) $(LX_TARGET) M=$(shell pwd) modules_install
+ endif

recipes-extended/uxen/uxen-guest-tools_4.1.7.bb

@@ -0,0 +1,22 @@
+SUMMARY = "uXen type-2 Open Source hypervisor Linux guest tools"
+DESCRIPTION = "Linux guest virtual machine tools for the uXen hypervisor"
+HOMEPAGE = "https://www.bromium.com/opensource"
+LICENSE = "GPLv2"
+
+COMPATIBLE_HOST = '(x86_64.*).*-linux'
+
+SRC_URI = " \
+    https://www.bromium.com/wp-content/uploads/2019/06/uxen-vmsupport-linux-${PV}.zip;name=uxen \
+    https://www.bromium.com/wp-content/uploads/2019/11/Bromium-4.1.8-Open-Source-Software.pdf;name=license \
+    file://fix-Makefile-for-OE-kernel-build.patch \
+    "
+
+SRC_URI[uxen.sha384sum] = "d9d7a1fa5c44ac77eea3d8d4756f9e07fc02acfe12606325ff0bb8a60c07abc3e9ddb80c2039797fb2122d750219722f"
+SRC_URI[license.sha384sum] = "92e48c614df3094cb52321d4c4e01f6df5526d46aee5c6fa36c43ee23d4c33f03baa1fc5f6f29efafff636b6d13bc92c"
+
+# The software license is GPLv2: please see page 199 of the pdf document
+LIC_FILES_CHKSUM = "file://../Bromium-4.1.8-Open-Source-Software.pdf;md5=cf120df6ffa417b36f870a9997650049"
+
+S = "${WORKDIR}/uxen-vmsupport-linux-${PV}"
+
+inherit module