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powerpc/kcsan: Add exclusions from instrumentation

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Exclude various incompatible compilation units from KCSAN
instrumentation.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-2-rmclure@linux.ibm.com
This commit is contained in:
Rohan McLure 2023-02-06 13:17:57 +11:00 committed by Michael Ellerman
parent 1ee4e35076
commit 2fb857bc9f
6 changed files with 16 additions and 0 deletions
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10
arch/powerpc/kernel/Makefile
View file

@ -54,6 +54,13 @@ CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
endif
KCSAN_SANITIZE_early_32.o := n
KCSAN_SANITIZE_early_64.o := n
KCSAN_SANITIZE_cputable.o := n
KCSAN_SANITIZE_btext.o := n
KCSAN_SANITIZE_paca.o := n
KCSAN_SANITIZE_setup_64.o := n
#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET
# Remove stack protector to avoid triggering unneeded stack canary
# checks due to randomize_kstack_offset.
@ -177,12 +184,15 @@ obj-$(CONFIG_PPC_SECVAR_SYSFS) += secvar-sysfs.o
# Disable GCOV, KCOV & sanitizers in odd or sensitive code
GCOV_PROFILE_prom_init.o := n
KCOV_INSTRUMENT_prom_init.o := n
KCSAN_SANITIZE_prom_init.o := n
UBSAN_SANITIZE_prom_init.o := n
GCOV_PROFILE_kprobes.o := n
KCOV_INSTRUMENT_kprobes.o := n
KCSAN_SANITIZE_kprobes.o := n
UBSAN_SANITIZE_kprobes.o := n
GCOV_PROFILE_kprobes-ftrace.o := n
KCOV_INSTRUMENT_kprobes-ftrace.o := n
KCSAN_SANITIZE_kprobes-ftrace.o := n
UBSAN_SANITIZE_kprobes-ftrace.o := n
GCOV_PROFILE_syscall_64.o := n
KCOV_INSTRUMENT_syscall_64.o := n

1
arch/powerpc/kernel/trace/Makefile
View file

@ -23,4 +23,5 @@ obj-$(CONFIG_PPC32) += $(obj32-y)
# Disable GCOV, KCOV & sanitizers in odd or sensitive code
GCOV_PROFILE_ftrace.o := n
KCOV_INSTRUMENT_ftrace.o := n
KCSAN_SANITIZE_ftrace.o := n
UBSAN_SANITIZE_ftrace.o := n

1
arch/powerpc/kernel/vdso/Makefile
View file

@ -46,6 +46,7 @@ GCOV_PROFILE := n
KCOV_INSTRUMENT := n
UBSAN_SANITIZE := n
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
ccflags-y := -shared -fno-common -fno-builtin -nostdlib -Wl,--hash-style=both
ccflags-$(CONFIG_LD_IS_LLD) += $(call cc-option,--ld-path=$(LD),-fuse-ld=lld)

2
arch/powerpc/lib/Makefile
View file

@ -16,6 +16,8 @@ KASAN_SANITIZE_feature-fixups.o := n
# restart_table.o contains functions called in the NMI interrupt path
# which can be in real mode. Disable KASAN.
KASAN_SANITIZE_restart_table.o := n
KCSAN_SANITIZE_code-patching.o := n
KCSAN_SANITIZE_feature-fixups.o := n
ifdef CONFIG_KASAN
CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING

1
arch/powerpc/purgatory/Makefile
View file

@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
targets += trampoline_$(BITS).o purgatory.ro

1
arch/powerpc/xmon/Makefile
View file

@ -5,6 +5,7 @@ GCOV_PROFILE := n
KCOV_INSTRUMENT := n
UBSAN_SANITIZE := n
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
# Disable ftrace for the entire directory
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)