On AArch64, the bootloader is responsible for unpacking the kernel image
prior loading it. This has to be specified within the FIT image.

Signed-off-by: Holger Assmann <[email protected]>
---
 platforms/kernel-fit.in             |  6 ++++++
 rules/kernel-fit.make               |  1 +
 rules/post/ptxd_make_image_fit.make | 13 +++++++------
 scripts/lib/ptxd_make_fit_image.sh  |  2 +-
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/platforms/kernel-fit.in b/platforms/kernel-fit.in
index 5b160c57d..3ed69f3f2 100644
--- a/platforms/kernel-fit.in
+++ b/platforms/kernel-fit.in
@@ -17,6 +17,12 @@ menuconfig KERNEL_FIT
 
 if KERNEL_FIT
 
+config KERNEL_FIT_KERNEL_COMPRESSION
+       string
+       # Keep in sync with KERNEL_IMAGE
+       default "gzip" if KERNEL_IMAGE_Z && (ARCH_ARM64 || ARCH_RISCV)
+       default "none"
+
 config KERNEL_FIT_NOLOAD
        bool
        prompt "Sub-image type 'kernel_noload'"
diff --git a/rules/kernel-fit.make b/rules/kernel-fit.make
index 64e82042f..87250c648 100644
--- a/rules/kernel-fit.make
+++ b/rules/kernel-fit.make
@@ -25,6 +25,7 @@ KERNEL_FIT_SIGN_ROLE          := image-kernel-fit
 KERNEL_FIT_KEY_NAME_HINT       := image-kernel-fit
 endif
 KERNEL_FIT_KERNEL               = $(KERNEL_IMAGE_PATH_y)
+KERNEL_FIT_KERNEL_COMPRESSION  := $(call 
remove_quotes,$(PTXCONF_KERNEL_FIT_KERNEL_COMPRESSION))
 ifdef PTXCONF_KERNEL_FIT_INITRAMFS
 KERNEL_FIT_INITRAMFS           := $(IMAGEDIR)/root.cpio
 endif
diff --git a/rules/post/ptxd_make_image_fit.make 
b/rules/post/ptxd_make_image_fit.make
index 2dd5bce9e..b363f1f13 100644
--- a/rules/post/ptxd_make_image_fit.make
+++ b/rules/post/ptxd_make_image_fit.make
@@ -7,12 +7,13 @@
 #
 
 world/image-fit/env/impl = \
-       $(call world/image/env, $(1))                                   \
-       $(CODE_SIGNING_ENV)                                             \
-       image_sign_role="$(call ptx/escape,$($(1)_SIGN_ROLE))"          \
-       image_key_name_hint="$(call ptx/escape,$($(1)_KEY_NAME_HINT))"  \
-       image_kernel="$(call ptx/escape,$($(1)_KERNEL))"                \
-       image_initramfs="$(call ptx/escape,$($(1)_INITRAMFS))"          \
+       $(call world/image/env, $(1))                                           
\
+       $(CODE_SIGNING_ENV)                                                     
\
+       image_sign_role="$(call ptx/escape,$($(1)_SIGN_ROLE))"                  
\
+       image_key_name_hint="$(call ptx/escape,$($(1)_KEY_NAME_HINT))"          
\
+       image_kernel="$(call ptx/escape,$($(1)_KERNEL))"                        
\
+       image_kernel_compression="$(call 
ptx/escape,$($(1)_KERNEL_COMPRESSION))"\
+       image_initramfs="$(call ptx/escape,$($(1)_INITRAMFS))"                  
\
        image_dtb="$(call ptx/escape,$($(1)_DTB))"
 
 world/image-fit/env = \
diff --git a/scripts/lib/ptxd_make_fit_image.sh 
b/scripts/lib/ptxd_make_fit_image.sh
index ad9e5bdd3..f5b7755ea 100644
--- a/scripts/lib/ptxd_make_fit_image.sh
+++ b/scripts/lib/ptxd_make_fit_image.sh
@@ -21,7 +21,7 @@ ptxd_make_image_fit_its() {
                        data = /incbin/("${image_kernel}");
                        arch = "$(ptxd_get_ptxconf PTXCONF_ARCH_STRING)";
                        os = "linux";
-                       compression = "none";
+                       compression = "${image_kernel_compression}";
 EOF
     if [ -n "$(ptxd_get_ptxconf PTXCONF_KERNEL_FIT_NOLOAD)" ]; then
         cat << EOF
-- 
2.47.3


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