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[kirkstone,1/2] wic: add UEFI kernel as UEFI stub

Message ID 20221103143850.2285312-1-mikko.rapeli@linaro.org
State New, archived
Headers show
Series [kirkstone,1/2] wic: add UEFI kernel as UEFI stub | expand

Commit Message

Mikko Rapeli Nov. 3, 2022, 2:38 p.m. UTC 
From: Maxim Uvarov <maxim.uvarov@linaro.org>

Linux kernel can be compiled as UEFI stub and loaded directly
with UEFI firmware without grub or other UEFI shell.

Tested with wic file:
bootloader  --ptable gpt --timeout=0  --append="rootwait"
part /boot --source bootimg-efi --sourceparams="loader=uefi-kernel" \
 --ondisk sda  --fstype=vfat --label bootfs \
  --active --align 1024 --use-uuid
part / --source rootfs --fstype=ext4 --label rootfs \
  --align 1024 --exclude-path boot/ --use-label

(From OE-Core rev: b18025fc8a2dad963b6f4b697e24455f2511b279)

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 scripts/lib/wic/plugins/source/bootimg-efi.py | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
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Patch

diff --git a/scripts/lib/wic/plugins/source/bootimg-efi.py b/scripts/lib/wic/plugins/source/bootimg-efi.py
index a65a5b9780..f74aaa4a81 100644
--- a/scripts/lib/wic/plugins/source/bootimg-efi.py
+++ b/scripts/lib/wic/plugins/source/bootimg-efi.py
@@ -210,6 +210,8 @@  class BootimgEFIPlugin(SourcePlugin):
                 cls.do_configure_grubefi(hdddir, creator, cr_workdir, source_params)
             elif source_params['loader'] == 'systemd-boot':
                 cls.do_configure_systemdboot(hdddir, creator, cr_workdir, source_params)
+            elif source_params['loader'] == 'uefi-kernel':
+                return
             else:
                 raise WicError("unrecognized bootimg-efi loader: %s" % source_params['loader'])
         except KeyError:
@@ -365,6 +367,28 @@  class BootimgEFIPlugin(SourcePlugin):
                 for mod in [x for x in os.listdir(kernel_dir) if x.startswith("systemd-")]:
                     cp_cmd = "cp %s/%s %s/EFI/BOOT/%s" % (kernel_dir, mod, hdddir, mod[8:])
                     exec_cmd(cp_cmd, True)
+            elif source_params['loader'] == 'uefi-kernel':
+                kernel = get_bitbake_var("KERNEL_IMAGETYPE")
+                if not kernel:
+                    raise WicError("Empty KERNEL_IMAGETYPE %s\n" % target)
+                target = get_bitbake_var("TARGET_SYS")
+                if not target:
+                    raise WicError("Unknown arch (TARGET_SYS) %s\n" % target)
+
+                if re.match("x86_64", target):
+                    kernel_efi_image = "bootx64.efi"
+                elif re.match('i.86', target):
+                    kernel_efi_image = "bootia32.efi"
+                elif re.match('aarch64', target):
+                    kernel_efi_image = "bootaa64.efi"
+                elif re.match('arm', target):
+                    kernel_efi_image = "bootarm.efi"
+                else:
+                    raise WicError("UEFI stub kernel is incompatible with target %s" % target)
+
+                for mod in [x for x in os.listdir(kernel_dir) if x.startswith(kernel)]:
+                    cp_cmd = "cp %s/%s %s/EFI/BOOT/%s" % (kernel_dir, mod, hdddir, kernel_efi_image)
+                    exec_cmd(cp_cmd, True)
             else:
                 raise WicError("unrecognized bootimg-efi loader: %s" %
                                source_params['loader'])