diff options
| author | Dimitri John Ledkov <dimitri.ledkov@canonical.com> | 2021-06-15 12:41:50 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-06-18 16:41:22 +0200 |
| commit | 7b034d9c1b08b3d06ad712283c1115a7fe39e354 (patch) | |
| tree | 741c2c99c90d7e652984c929bf46dffccaada251 | |
| parent | 54f45214522ae74dc23ad262346ce1abbf96b1ed (diff) | |
s390/boot: add zstd support
Enable ztsd support in s390/boot, to enable booting with zstd
compressed kernel when configured with CONFIG_KERNEL_ZSTD=y.
BOOT_HEAP_SIZE is defined to 0x30000 in this case. Actual decompressor
memory usage with allyesconfig is currently 0x26150.
BugLink: https://bugs.launchpad.net/bugs/1931725
Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
cc: Heiko Carstens <hca@linux.ibm.com>
cc: Vasily Gorbik <gor@linux.ibm.com>
cc: Christian Borntraeger <borntraeger@de.ibm.com>
cc: linux-s390@vger.kernel.org
Link: https://lore.kernel.org/r/20210615114150.325080-1-dimitri.ledkov@canonical.com
[gor: added BOOT_HEAP_SIZE for zstd]
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | arch/s390/Kconfig | 1 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 4 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/decompressor.c | 6 |
3 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 93488bbf491b..e2ece2a74b24 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -173,6 +173,7 @@ config S390 select HAVE_KERNEL_LZO select HAVE_KERNEL_UNCOMPRESSED select HAVE_KERNEL_XZ + select HAVE_KERNEL_ZSTD select HAVE_KPROBES select HAVE_KPROBES_ON_FTRACE select HAVE_KRETPROBES diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index e941b165bd4f..660c799d875d 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -14,6 +14,7 @@ obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o obj-all := $(obj-y) piggy.o syms.o targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4 +targets += vmlinux.bin.zst targets += info.bin syms.bin vmlinux.syms $(obj-all) KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) @@ -63,6 +64,7 @@ suffix-$(CONFIG_KERNEL_LZ4) := .lz4 suffix-$(CONFIG_KERNEL_LZMA) := .lzma suffix-$(CONFIG_KERNEL_LZO) := .lzo suffix-$(CONFIG_KERNEL_XZ) := .xz +suffix-$(CONFIG_KERNEL_ZSTD) := .zst $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE $(call if_changed,gzip) @@ -76,6 +78,8 @@ $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE $(call if_changed,lzo) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE $(call if_changed,xzkern) +$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE + $(call if_changed,zstd22) OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed $(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE diff --git a/arch/s390/boot/compressed/decompressor.c b/arch/s390/boot/compressed/decompressor.c index cf2571050c68..37a4a8d33c6c 100644 --- a/arch/s390/boot/compressed/decompressor.c +++ b/arch/s390/boot/compressed/decompressor.c @@ -30,6 +30,8 @@ extern unsigned char _compressed_end[]; #ifdef CONFIG_KERNEL_BZIP2 #define BOOT_HEAP_SIZE 0x400000 +#elif CONFIG_KERNEL_ZSTD +#define BOOT_HEAP_SIZE 0x30000 #else #define BOOT_HEAP_SIZE 0x10000 #endif @@ -61,6 +63,10 @@ static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE; #include "../../../../lib/decompress_unxz.c" #endif +#ifdef CONFIG_KERNEL_ZSTD +#include "../../../../lib/decompress_unzstd.c" +#endif + #define decompress_offset ALIGN((unsigned long)_end + BOOT_HEAP_SIZE, PAGE_SIZE) unsigned long mem_safe_offset(void) |