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

The Xen hypervisor built for Arm 32-bit targets can be launched with
runqemu by providing a u-boot script and configuration for Qemu, which
enables interactive testing of Xen images.

Add qemuboot-xen-u-boot.bbclass to add a new bitbake task for generating
the u-boot script. Since this increases the number of qemuboot-specific
classes that are inherited by the xen-image-minimal recipe, change the
inherit of all of these to only apply to qemu machines with the qemuall
override.

Update qemuboot-xen-defaults.bbclass to supply working default
parameters for the qemuarm machine needed to boot successfully in
testing. Also change all the arch-specific variable overrides into
narrower qemu platform overrides instead to avoid unnecessary
interactions with other Arm platform machines.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/conf/distro/include/meta-virt-xen.inc b/conf/distro/include/meta-virt-xen.inc
index 5fbb57f8..89f98f28 100644
--- a/conf/distro/include/meta-virt-xen.inc
+++ b/conf/distro/include/meta-virt-xen.inc
@@ -12,4 +12,5 @@ include ${@bb.utils.contains('MACHINE', 'raspberrypi4-64', \
     '${XEN_RPI4_64_CONFIG_PATH}', '', d)}
 
 # Set serial for working qemuboot console
+SERIAL_CONSOLES:qemuarm ?= "115200;ttyAMA0"
 SERIAL_CONSOLES:qemuarm64 ?= "115200;ttyAMA0"