kernel.git/arch/s390/kernel/Makefile, branch linux-4.19.y

s390/kasan: avoid instrumentation of early C code

2019-11-24T07:20:44Z

[ Upstream commit 0a9b40911baffac6fc9cc2d88e893585870a97f7 ] Instrumented C code cannot run without the kasan shadow area. Exempt source code files from kasan which are running before / used during kasan initialization. Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky Signed-off-by: Sasha Levin

jump_label: move 'asm goto' support test to Kconfig

2019-06-04T06:02:34Z

commit e9666d10a5677a494260d60d1fa0b73cc7646eb3 upstream. Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label". The jump label is controlled by HAVE_JUMP_LABEL, which is defined like this: #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) # define HAVE_JUMP_LABEL #endif We can improve this by testing 'asm goto' support in Kconfig, then make JUMP_LABEL depend on CC_HAS_ASM_GOTO. Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will match to the real kernel capability. Signed-off-by: Masahiro Yamada Acked-by: Michael Ellerman (powerpc) Tested-by: Sedat Dilek [nc: Fix trivial conflicts in 4.19 arch/xtensa/kernel/jump_label.c doesn't exist yet Ensured CC_HAVE_ASM_GOTO and HAVE_JUMP_LABEL were sufficiently eliminated] Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman

s390/boot: make head.S and als.c be part of the decompressor only

2018-06-25T08:14:38Z

Since uncompressed kernel image does not have to be bootable anymore, move head.S, head_kdump.S and als.c to boot/ folder and compile them in just in the decompressor. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390: introduce compile time check for empty .bss section

2018-05-09T08:55:01Z

Introduce compile time check for files which should avoid using .bss section, because of the following reasons: - .bss section has not been zeroed yet, - initrd has not been moved to a safe location and could be overlapping with .bss section. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/early: move functions which may not access bss section to extra file

2018-05-09T08:55:01Z

Move functions which may not access bss section to extra file. This makes it easier to verify that all early functions which may not rely on an initialized bss section are not accessing it. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390: move spectre sysfs attribute code

2018-05-07T19:12:41Z

The nospec-branch.c file is compiled without the gcc options to generate expoline thunks. The return branch of the sysfs show functions cpu_show_spectre_v1 and cpu_show_spectre_v2 is an indirect branch as well. These need to be compiled with expolines. Move the sysfs functions for spectre reporting to a separate file and loose an '.' for one of the messages. Cc: stable@vger.kernel.org # 4.16 Fixes: d424986f1d ("s390: add sysfs attributes for spectre") Signed-off-by: Martin Schwidefsky

s390/kexec_file: Add ELF loader

2018-04-16T07:10:23Z

Add an ELF loader for kexec_file. The main task here is to do proper sanity checks on the ELF file. Basically all other functionality was already implemented for the image loader. Signed-off-by: Philipp Rudo Signed-off-by: Martin Schwidefsky

s390/kexec_file: Add image loader

2018-04-16T07:10:22Z

Add an image loader for kexec_file_load. For simplicity first skip crash support. The functions defined in machine_kexec_file will later be shared with the ELF loader. Signed-off-by: Philipp Rudo Reviewed-by: Martin Schwidefsky Signed-off-by: Martin Schwidefsky

s390/kexec_file: Add kexec_file_load system call

2018-04-16T07:10:22Z

This patch adds the kexec_file_load system call to s390 as well as the arch specific functions common code requires to work. Loaders for the different file types will be added later. Signed-off-by: Philipp Rudo Signed-off-by: Martin Schwidefsky

s390: move nobp parameter functions to nospec-branch.c

2018-03-28T06:38:23Z

Keep the code for the nobp parameter handling with the code for expolines. Both are related to the spectre v2 mitigation. Signed-off-by: Martin Schwidefsky