linux-kernel - [PATCH v2] arm64: Allow packing uncompressed images into distro packages

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Message-Id: <20240910-uncompressed-distro-packages-v2-1-51538434787f@quicinc.com>
Date: Tue, 10 Sep 2024 19:53:16 -0700
From: Bjorn Andersson <andersson@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, 
 Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, Bjorn Andersson <quic_bjorande@...cinc.com>
Subject: [PATCH v2] arm64: Allow packing uncompressed images into distro
 packages

From: Bjorn Andersson <quic_bjorande@...cinc.com>

The distro packages (deb-pkg, pacman-pkg, rpm-pkg) are generated using
the compressed kernel image, which means that the kernel once installed
can not be booted with systemd-boot.

This differs from the packages generated by the distros themselves,
which uses the uncompressed image.

Use the newly introduced CONFIG_COMPRESSED_INSTALL option to allow
selection of which version of the kernel image should be packaged into
the distro packages.

Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
Changes in v2:
- Restore the install-specific handling to retain the behavior of
  installing the uncompressed "Image" under CONFIG_EFI_ZBOOT=y &&
  CONFIG_COMPRESSED_INSTALL=n.
- Link to v1: https://lore.kernel.org/r/20240819-uncompressed-distro-packages-v1-1-c8accc8bc9ea@quicinc.com
---
 arch/arm64/Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index f6bc3da1ef11..3d9752e56109 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -166,9 +166,13 @@ BOOT_TARGETS	:= Image vmlinuz.efi image.fit
 PHONY += $(BOOT_TARGETS)
 
 ifeq ($(CONFIG_EFI_ZBOOT),)
-KBUILD_IMAGE	:= $(boot)/Image.gz
+  ifeq ($(CONFIG_COMPRESSED_INSTALL),y)
+    KBUILD_IMAGE := $(boot)/Image.gz
+  else
+    KBUILD_IMAGE := $(boot)/Image
+  endif
 else
-KBUILD_IMAGE	:= $(boot)/vmlinuz.efi
+  KBUILD_IMAGE := $(boot)/vmlinuz.efi
 endif
 
 all:	$(notdir $(KBUILD_IMAGE))

---
base-commit: 469f1bad3c1c6e268059f78c0eec7e9552b3894c
change-id: 20240819-uncompressed-distro-packages-8da6959ed698

Best regards,
-- 
Bjorn Andersson <quic_bjorande@...cinc.com>