aboutsummaryrefslogtreecommitdiffstats
path: root/init
diff options
context:
space:
mode:
authorVasily Gorbik <gor@linux.ibm.com>2018-06-12 21:26:35 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-06-25 10:14:40 +0200
commitf16466af385b985f8d56f3fc50146ab41ec0dd89 (patch)
treef2d7f7a8818519e182f6c3c623cc47f9ba92c038 /init
parentc98b6c679a3b8032a2dd5c9724f489e1b959e5a7 (diff)
init/Kconfig: add an option for uncompressed kernel
Add "None" as the kernel compression mode. This option is useful for debugging the kernel in slow simulation environments, where decompressing and moving the kernel is awfully slow. Uncompressed kernel implementation might allow early boot code to skip the decompressor and jump right at uncompressed kernel image entry point. Platforms implementing that should define HAVE_KERNEL_UNCOMPRESSED. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig15
1 files changed, 14 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index fde3d09e8b27..79036797bf06 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -125,10 +125,13 @@ config HAVE_KERNEL_LZO
config HAVE_KERNEL_LZ4
bool
+config HAVE_KERNEL_UNCOMPRESSED
+ bool
+
choice
prompt "Kernel compression mode"
default KERNEL_GZIP
- depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4
+ depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4 || HAVE_KERNEL_UNCOMPRESSED
help
The linux kernel is a kind of self-extracting executable.
Several compression algorithms are available, which differ
@@ -207,6 +210,16 @@ config KERNEL_LZ4
is about 8% bigger than LZO. But the decompression speed is
faster than LZO.
+config KERNEL_UNCOMPRESSED
+ bool "None"
+ depends on HAVE_KERNEL_UNCOMPRESSED
+ help
+ Produce uncompressed kernel image. This option is usually not what
+ you want. It is useful for debugging the kernel in slow simulation
+ environments, where decompressing and moving the kernel is awfully
+ slow. This option allows early boot code to skip the decompressor
+ and jump right at uncompressed kernel image.
+
endchoice
config DEFAULT_HOSTNAME

Privacy Policy