@@ -59,12 +59,26 @@ python do_compile() {
)
# Prepare a kernel image section.
- shutil.copyfile(os.path.join(kernel_deploydir, "linux.bin"), "linux.bin")
- with open(os.path.join(kernel_deploydir, "linux_comp")) as linux_comp_f:
- linux_comp = linux_comp_f.read()
- root_node.fitimage_emit_section_kernel("kernel-1", "linux.bin", linux_comp,
+ # Construct the full path to linux.bin
+ linux_bin_path = os.path.join(kernel_deploydir, "linux.bin")
+
+ # Check if linux.bin exists
+ if os.path.exists(linux_bin_path):
+ # Copy linux.bin to current directory
+ shutil.copyfile(linux_bin_path, "linux.bin")
+
+ # Read linux_comp file
+ linux_comp_path = os.path.join(kernel_deploydir, "linux_comp")
+ with open(linux_comp_path, 'r') as linux_comp_f:
+ linux_comp = linux_comp_f.read()
+
+ # Emit kernel image section
+ root_node.fitimage_emit_section_kernel("kernel-1", "linux.bin", linux_comp,
d.getVar('UBOOT_LOADADDRESS'), d.getVar('UBOOT_ENTRYPOINT'),
d.getVar('UBOOT_MKIMAGE_KERNEL_TYPE'), d.getVar("UBOOT_ENTRYSYMBOL"))
+ else:
+ bb.note("linux.bin not found. Skipping kernel image preparation. ")
+
# Prepare a DTB image section
kernel_devicetree = d.getVar('KERNEL_DEVICETREE')
Avoids errors during image generation by checking for the presence of linux.bin before attempting to copy and emit the kernel section. This ensures that the build process continues gracefully when the kernel binary is not available. A clean separation between firmware (including DTBs) and the HLOS (Linux Kernel) is highly recommended and often necessary to enable independent firmware updates, enforce trust boundaries, and support running the same kernel across different hardware platforms by simply swapping DTBs. One effective way to achieve this separation is by using a Unified Kernel Image (UKI) that contains only the Linux kernel and initramfs, while keeping the DTBs in a separate FIT image, such as dtb.bin. To support this setup, it's important to ensure that a FIT image can be generated without requiring the Linux kernel binary, allowing the build process to continue gracefully even when the kernel is unavailable. Additionally, this approach is very useful when the kernel-fit- extra-artifacts class is not set, as it enables the creation of an .its file without depending on the kernel. Signed-off-by: Kavinaya S <kavinaya@qti.qualcomm.com> --- meta/classes-recipe/kernel-fit-image.bbclass | 22 ++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-)