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| author | Vasily Gorbik <gor@linux.ibm.com> | 2018-06-12 21:26:35 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-06-25 10:14:40 +0200 |
| commit | f16466af385b985f8d56f3fc50146ab41ec0dd89 (patch) | |
| tree | f2d7f7a8818519e182f6c3c623cc47f9ba92c038 /init/Kconfig | |
| parent | c98b6c679a3b8032a2dd5c9724f489e1b959e5a7 (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/Kconfig')
| -rw-r--r-- | init/Kconfig | 15 |
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 |