linux-kernel - [PATCH v2 4/4] powerpc/boot: Add lzo support for uImage

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Message-Id: <3aec9f9a286e592761bccc10958621163eb375ed.1556028978.git.christophe.leroy@c-s.fr>
Date:   Tue, 23 Apr 2019 14:20:44 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 4/4] powerpc/boot: Add lzo support for uImage

This patch allows to generate lzo compressed uImage

Signed-off-by: Christophe Leroy <christophe.leroy@....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 c9fd20988237..b5a3708a852d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -202,6 +202,7 @@ config PPC
 	select HAVE_KERNEL_BZIP2		if DEFAULT_UIMAGE
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
+	select HAVE_KERNEL_LZO			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 0a7f8c2dc8af..4675575774d7 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -24,6 +24,7 @@ compress-$(CONFIG_KERNEL_GZIP) := CONFIG_KERNEL_GZIP
 compress-$(CONFIG_KERNEL_XZ)   := CONFIG_KERNEL_XZ
 compress-$(CONFIG_KERNEL_LZMA) := CONFIG_KERNEL_LZMA
 compress-$(CONFIG_KERNEL_BZIP2)   := CONFIG_KERNEL_BZIP2
+compress-$(CONFIG_KERNEL_LZO)   := CONFIG_KERNEL_LZO
 
 ifdef CROSS32_COMPILE
     BOOTCC := $(CROSS32_COMPILE)gcc
@@ -261,6 +262,7 @@ compressor-$(CONFIG_KERNEL_GZIP) := gz
 compressor-$(CONFIG_KERNEL_XZ)   := xz
 compressor-$(CONFIG_KERNEL_LZMA)   := lzma
 compressor-$(CONFIG_KERNEL_BZIP2) := bz2
+compressor-$(CONFIG_KERNEL_LZO) := lzo
 
 # args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
 quiet_cmd_wrap	= WRAP    $@
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index d1384e8c0c6f..2fd3483f9d80 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -137,7 +137,7 @@ while [ "$#" -gt 0 ]; do
     -Z)
 	shift
 	[ "$#" -gt 0 ] || usage
-        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "bz2" -o "$1" != "none" ] || usage
+        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "bz2" -o "$1" != "lzo" -o "$1" != "none" ] || usage
 
 	compression=".$1"
 	uboot_comp=$1
@@ -383,6 +383,9 @@ if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel
     .bz2)
         bzip2 -f "$vmz.$$"
 	;;
+    .lzo)
+        lzop -f -9 "$vmz.$$"
+	;;
     *)
         # drop the compression suffix so the stripped vmlinux is used
         compression=
-- 
2.13.3