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linux: add support for Image.gz kernel format

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arm64 / riscv supports building a gzip compressed 'Image' format kernel,
which is sometimes useful. From arch/arm64/Makefile:

all:	Image.gz

Image: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

Image.%: Image
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

(and similar logic for riscv)

Future architectures may or may not copy this logic, so for robustness add
an explicit Image.gz format rather than copying both Image and Image.gz when
the Image format is used.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Peter Korsgaard 2021-01-22 11:39:49 +01:00 committed by Thomas Petazzoni
parent 0afd150f5c
commit 96c26ce863
2 changed files with 6 additions and 0 deletions
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4
linux/Config.in
View File

@ -263,6 +263,10 @@ config BR2_LINUX_KERNEL_IMAGE
bool "Image"
depends on BR2_aarch64 || BR2_riscv
config BR2_LINUX_KERNEL_IMAGEGZ
bool "Image.gz"
depends on BR2_aarch64 || BR2_riscv
config BR2_LINUX_KERNEL_LINUX_BIN
bool "linux.bin"
depends on BR2_microblaze

2
linux/linux.mk
View File

@ -204,6 +204,8 @@ else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
LINUX_IMAGE_NAME = Image
else ifeq ($(BR2_LINUX_KERNEL_IMAGEGZ),y)
LINUX_IMAGE_NAME = Image.gz
else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
LINUX_IMAGE_NAME = linux.bin
else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)