qemuboot, xen-image-minimal: enable runqemu for qemuarm64 Xen images

The Xen hypervisor built for Arm 64-bit targets can be launched with
runqemu by providing a Device Tree binary and configuration for Qemu,
which enables interactive testing of Xen images.

Add qemuboot-xen-dtb.bbclass to add a new bitbake task for generating
the dtb file by using lopper on a device tree produced by Qemu.

Add qemuboot-xen-defaults.bbclass to supply working default parameters
for the qemuarm64 machine and general support for qemuboot for Xen,
and adjust the defaults as needed to boot successfully in testing.

Development aided by this script by Stewart Hildebrand of DornerWorks:
https://gist.github.com/stewdk/110f43e0cc1d905fc6ed4c7e10d8d35e

Signed-off-by: Christopher Clark <christopher.clark@starlab.io>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/recipes-extended/images/xen-image-minimal.bb b/recipes-extended/images/xen-image-minimal.bb
index 6733801c..ca6d2683 100644
--- a/recipes-extended/images/xen-image-minimal.bb
+++ b/recipes-extended/images/xen-image-minimal.bb
@@ -31,7 +31,7 @@ XEN_PCIBACK_MODULE_x86-64 = "kernel-module-xen-pciback"
 
 LICENSE = "MIT"
 
-inherit core-image
+inherit core-image qemuboot-xen-defaults qemuboot-xen-dtb
 
 do_check_xen_state() {
     if [ "${@bb.utils.contains('DISTRO_FEATURES', 'xen', ' yes', 'no', d)}" = "no" ]; then
@@ -74,10 +74,11 @@ build_syslinux_cfg () {
 
 # Enable runqemu. eg: runqemu xen-image-minimal nographic slirp
 WKS_FILE_x86-64 = "directdisk-xen.wks"
-QB_MEM ?= "-m 400"
 QB_DEFAULT_KERNEL ?= "none"
 QB_DEFAULT_FSTYPE ?= "wic"
+QB_DEFAULT_FSTYPE_qemux86-64 = "wic"
 QB_FSINFO ?= "wic:kernel-in-fs"
+QB_SERIAL_OPT = "-serial mon:stdio"
 # qemux86-64 machine does not include 'wic' in IMAGE_FSTYPES, which is needed
 # to boot this image, so add it here:
 IMAGE_FSTYPES_qemux86-64 += "wic"