parisc: Reintroduce option to gzip-compress the kernel

PATCH New Helge Deller 1 participant 1 message Sep 22, 2017 PA-RISC architecture

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Helge Deller

author maintainer

2017-09-22 20:24 UTC #0 lore raw

PATCH 1/1 parisc: Reintroduce option to gzip-compress the kernel

By adding the feature to build the kernel as self-extracting executeable, the possibility to simply compress the kernel with gzip was lost.

This patch now reintroduces this possibilty again and leaves it up to the user to decide how the kernel should be built.

The palo bootloader is able to natively load both formats.

Signed-off-by Helge Deller <[email protected]>

arch/parisc/Kconfig +12 -0

index bb8ed34024ef..cce21a159fe7 100644
@@ -258,6 +258,18 @@ config PARISC_PAGE_SIZE_64KB
 
 endchoice
 
+config PARISC_SELF_EXTRACT
+	bool "Build kernel as self-extracting executable"
+	default y
+	help
+	  Say Y if you want to build the parisc kernel as a kind of
+	  self-extracting executable.
+
+	  If you say N here, the kernel will be compressed with gzip
+	  which can be loaded by the palo bootloader directly too.
+
+	  If you don't know what to do here, say Y.
+
 config SMP
 	bool "Symmetric multi-processing support"
 	---help---

arch/parisc/Makefile +5 -0

index 58fae5d2449d..01946ebaff72 100644
@@ -129,8 +129,13 @@ Image: vmlinux
 bzImage: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
+ifdef CONFIG_PARISC_SELF_EXTRACT
 vmlinuz: bzImage
 	$(OBJCOPY) $(boot)/bzImage $@
+else
+vmlinuz: vmlinux
+	@gzip -cf -9 $< > $@
+endif
 
 install:
 	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \