TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/boot: Increase minimum architecture to z10

Browse Source 
The decompressor code is partially compiled with march=z900 so it is
possible to print an error message in case a kernel is booted on a
machine which misses facilities to execute the kernel.

Given that the decompressor code also includes header files from the
core kernel this causes problems for inline assemblies and other code
where the minimum assumed architecture level is set to z10 in the
meantime. If such code is also used in the decompressor (e.g. inline
functions) z900 support must be implemented again.

In order to avoid this and to keep things simple just raise the
minimum architecture level to z10 for the decompressor just like for
the kernel.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens
2024-09-04 11:39:23 +02:00
parent 6fa7aea6a9
commit db545f5387
1 changed files with 0 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/s390/boot/Makefile
-4
View File
@@ -18,11 +18,7 @@ KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
# Use minimum architecture for als.c to be able to print an error
# message if the kernel is started on a machine which is too old
#
ifndef CONFIG_CC_IS_CLANG
CC_FLAGS_MARCH_MINIMUM := -march=z900
else
CC_FLAGS_MARCH_MINIMUM := -march=z10
endif
ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM))
AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)