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s390: enable kcov support 

Now that hopefully all inline assemblies have been converted to single
basic blocks we can enable kcov on s390.

Note that this patch does not disable as many files on s390 like the
x86 variant does. Right now I didn't see a reason to do that, however
additional files or directories can be excluded at any time.

The runtime overhead seems to be quite high.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2016-06-20 14:08:32 +02:00 committed by Martin Schwidefsky
parent e238c15e52
commit 907fa061cc
5 changed files with 10 additions and 0 deletions
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1
arch/s390/Kconfig
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@ -72,6 +72,7 @@ config S390
select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_KCOV
select ARCH_HAS_SG_CHAIN select ARCH_HAS_SG_CHAIN
select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_INLINE_READ_LOCK select ARCH_INLINE_READ_LOCK

2
arch/s390/boot/compressed/Makefile
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@ -4,6 +4,8 @@
# create a compressed vmlinux image from the original vmlinux # create a compressed vmlinux image from the original vmlinux
# #
KCOV_INSTRUMENT := n
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 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.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
targets += misc.o piggy.o sizes.h head.o targets += misc.o piggy.o sizes.h head.o

3
arch/s390/kernel/Makefile
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@ -2,6 +2,9 @@
# Makefile for the linux kernel. # Makefile for the linux kernel.
# #
KCOV_INSTRUMENT_early.o := n
KCOV_INSTRUMENT_sclp.o := n
ifdef CONFIG_FUNCTION_TRACER ifdef CONFIG_FUNCTION_TRACER
# Don't trace early setup code and tracing code # Don't trace early setup code and tracing code
CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE)

2
arch/s390/kernel/vdso32/Makefile
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@ -1,5 +1,7 @@
# List of files in the vdso, has to be asm only for now # List of files in the vdso, has to be asm only for now
KCOV_INSTRUMENT := n
obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
# Build rules # Build rules

2
arch/s390/kernel/vdso64/Makefile
View File

@ -1,5 +1,7 @@
# List of files in the vdso, has to be asm only for now # List of files in the vdso, has to be asm only for now
KCOV_INSTRUMENT := n
obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
# Build rules # Build rules