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authorKefeng Wang <wangkefeng.wang@huawei.com>2021-12-11 16:17:34 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2021-12-14 21:54:34 +0300
commitdd03762ab608e058c8f390ad9cf667e490089796 (patch)
treeb10773204ab7317c256802cf71632e3e535acdc6 /arch/arm64/kvm/hyp/nvhe/Makefile
parentd58071a8a76d779eedab38033ae4c821c30295a5 (diff)
downloadlinux-dd03762ab608e058c8f390ad9cf667e490089796.tar.xz
arm64: Enable KCSAN
This patch enables KCSAN for arm64, with updates to build rules to not use KCSAN for several incompatible compilation units. Recent GCC version(at least GCC10) made outline-atomics as the default option(unlike Clang), which will cause linker errors for kernel/kcsan/core.o. Disables the out-of-line atomics by no-outline-atomics to fix the linker errors. Meanwhile, as Mark said[1], some latent issues are needed to be fixed which isn't just a KCSAN problem, we make the KCSAN depends on EXPERT for now. Tested selftest and kcsan_test(built with GCC11 and Clang 13), and all passed. [1] https://lkml.kernel.org/r/YadiUPpJ0gADbiHQ@FVFF77S0Q05N Acked-by: Marco Elver <elver@google.com> # kernel/kcsan Tested-by: Joey Gouly <joey.gouly@arm.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Link: https://lore.kernel.org/r/20211211131734.126874-1-wangkefeng.wang@huawei.com [catalin.marinas@arm.com: added comment to justify EXPERT] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/Makefile')
-rw-r--r--arch/arm64/kvm/hyp/nvhe/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile
index c3c11974fa3b..24b2c2425b38 100644
--- a/arch/arm64/kvm/hyp/nvhe/Makefile
+++ b/arch/arm64/kvm/hyp/nvhe/Makefile
@@ -89,6 +89,7 @@ KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI)
# cause crashes. Just disable it.
GCOV_PROFILE := n
KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
UBSAN_SANITIZE := n
KCOV_INSTRUMENT := n