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authorOliver O'Halloran <oohall@gmail.com>2016-09-22 16:54:34 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-09-28 14:35:14 +1000
commitc762c69e106f2b41ef39981ba46bda0ae8119db5 (patch)
tree5cc3b8264952c39f8c57a1f7cb467c1a38f24824 /arch/powerpc/boot/Makefile
parentf1e510bbb9f265acb4147a3a650882876a76d48b (diff)
powerpc/boot: Add support for XZ compression
This patch adds an option to use XZ compression for the kernel image. Currently this is only enabled for 64-bit Book3S targets, which is roughly equivalent to the platforms that use the kernel's zImage wrapper, and that have been tested. The bulk of the 32-bit platforms and 64-bit BookE use uboot images, which relies on uboot implementing XZ. In future we can enable XZ support for those targets once someone has tested it. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/boot/Makefile')
-rw-r--r--arch/powerpc/boot/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 9fb451d0586e..eae2dc8bc218 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -20,6 +20,7 @@
all: $(obj)/zImage
compress-$(CONFIG_KERNEL_GZIP) := CONFIG_KERNEL_GZIP
+compress-$(CONFIG_KERNEL_XZ) := CONFIG_KERNEL_XZ
BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -Os -msoft-float -pipe \
@@ -226,6 +227,7 @@ endif
endif
compressor-$(CONFIG_KERNEL_GZIP) := gz
+compressor-$(CONFIG_KERNEL_XZ) := xz
# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
quiet_cmd_wrap = WRAP $@
@@ -433,6 +435,7 @@ clean-files += $(image-) $(initrd-) cuImage.* dtbImage.* treeImage.* \
# clean up files cached by wrapper
clean-kernel-base := vmlinux.strip vmlinux.bin
clean-kernel := $(addsuffix .gz,$(clean-kernel-base))
+clean-kernel += $(addsuffix .xz,$(clean-kernel-base))
# If not absolute clean-files are relative to $(obj).
clean-files += $(addprefix $(objtree)/, $(clean-kernel))