Add basic QEMU system testing scripts (#1428)

tests/qemu-tests/download_images.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+wget https://downloads.yoctoproject.org/releases/yocto/yocto-4.1.1/machines/qemu/qemux86-64/bzImage-qemux86-64.bin
+wget https://downloads.yoctoproject.org/releases/yocto/yocto-4.1.1/machines/qemu/qemux86-64/core-image-minimal-dev-qemux86-64-20221114164338.rootfs.ext4
+
+wget https://downloads.yoctoproject.org/releases/yocto/yocto-4.1.1/machines/qemu/qemuarm64/Image-qemuarm64.bin
+wget https://downloads.yoctoproject.org/releases/yocto/yocto-4.1.1/machines/qemu/qemuarm64/core-image-minimal-dev-qemuarm64-20221114170418.rootfs.ext4

tests/qemu-tests/test_qemu_system.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+ARCH="$1"
+
+if [[ "$ARCH" == aarch64 ]]; then
+    QEMU_BIN=qemu-system-aarch64
+    KERNEL=Image-qemuarm64.bin
+    ROOTFS=core-image-minimal-dev-qemuarm64-20221114170418.rootfs.ext4
+
+    QEMU_ARGS=(
+        -cpu cortex-a53
+        -machine virt
+        -append "console=ttyAMA0 root=/dev/vda"
+    )
+
+elif [[ "$ARCH" == "x86_64" ]]; then
+    QEMU_BIN=qemu-system-x86_64
+    KERNEL=bzImage-qemux86-64.bin
+    ROOTFS=core-image-minimal-dev-qemux86-64-20221114164338.rootfs.ext4
+
+    QEMU_ARGS=(
+        -accel kvm
+        -append "8250.nr_uarts=1 console=ttyS0 root=/dev/vda"
+    )
+
+else
+    echo "No arch specified"
+    exit 1
+fi
+
+tmux splitw -h -p 60 gdb-multiarch -ex "target remote :1234" -ex continue
+
+QEMU_ARGS+=(
+    -kernel $KERNEL
+    -nographic
+    -drive file=$ROOTFS,if=virtio,format=raw
+    -S -s
+)
+
+$QEMU_BIN "${QEMU_ARGS[@]}"