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Subject[PATCH v2 2/4] powerpc/boot: Add lzma support for uImage
Date
This patch allows to generate lzma compressed uImage

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

---
v2: restore alphabetic order in Kconfig
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/boot/Makefile | 2 ++
arch/powerpc/boot/wrapper | 5 ++++-
3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2d0be82c3061..dd22988cac0b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -200,6 +200,7 @@ config PPC
select HAVE_IOREMAP_PROT
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select HAVE_KERNEL_GZIP
+ select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE
select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x
select HAVE_KPROBES
select HAVE_KPROBES_ON_FTRACE
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 73d1f3562978..9b7b11a22925 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -22,6 +22,7 @@ all: $(obj)/zImage

compress-$(CONFIG_KERNEL_GZIP) := CONFIG_KERNEL_GZIP
compress-$(CONFIG_KERNEL_XZ) := CONFIG_KERNEL_XZ
+compress-$(CONFIG_KERNEL_LZMA) := CONFIG_KERNEL_LZMA

ifdef CROSS32_COMPILE
BOOTCC := $(CROSS32_COMPILE)gcc
@@ -257,6 +258,7 @@ endif

compressor-$(CONFIG_KERNEL_GZIP) := gz
compressor-$(CONFIG_KERNEL_XZ) := xz
+compressor-$(CONFIG_KERNEL_LZMA) := lzma

# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
quiet_cmd_wrap = WRAP $@
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 4e9beecf2502..51dc42f5acbc 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -137,7 +137,7 @@ while [ "$#" -gt 0 ]; do
-Z)
shift
[ "$#" -gt 0 ] || usage
- [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
+ [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "none" ] || usage

compression=".$1"
uboot_comp=$1
@@ -374,6 +374,9 @@ if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel
.gz)
gzip -n -f -9 "$vmz.$$"
;;
+ .lzma)
+ xz --format=lzma -f -6 "$vmz.$$"
+ ;;
*)
# drop the compression suffix so the stripped vmlinux is used
compression=
--
2.13.3
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