diff options
| author | Denis Nikitin <denik@chromium.org> | 2022-10-14 11:45:32 -0700 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-10-15 12:09:50 +0100 |
| commit | bde971a83bbff78561458ded236605a365411b87 (patch) | |
| tree | 9d6aa774f964ac8fa41f7b9229be63933e996140 /arch | |
| parent | 05c2224d4b049406b0545a10be05280ff4b8ba0a (diff) | |
| download | linux-bde971a83bbff78561458ded236605a365411b87.tar.gz | |
KVM: arm64: nvhe: Fix build with profile optimization
Kernel build with clang and KCFLAGS=-fprofile-sample-use=<profile> fails with: error: arch/arm64/kvm/hyp/nvhe/kvm_nvhe.tmp.o: Unexpected SHT_REL section ".rel.llvm.call-graph-profile" Starting from 13.0.0 llvm can generate SHT_REL section, see https://reviews.llvm.org/rGca3bdb57fa1ac98b711a735de048c12b5fdd8086. gen-hyprel does not support SHT_REL relocation section. Filter out profile use flags to fix the build with profile optimization. Signed-off-by: Denis Nikitin <denik@chromium.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221014184532.3153551-1-denik@chromium.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile index 48f6ae7cc6e6..be0a2bc3e20d 100644 --- a/arch/arm64/kvm/hyp/nvhe/Makefile +++ b/arch/arm64/kvm/hyp/nvhe/Makefile @@ -92,6 +92,10 @@ quiet_cmd_hypcopy = HYPCOPY $@ # Remove ftrace, Shadow Call Stack, and CFI CFLAGS. # This is equivalent to the 'notrace', '__noscs', and '__nocfi' annotations. KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI), $(KBUILD_CFLAGS)) +# Starting from 13.0.0 llvm emits SHT_REL section '.llvm.call-graph-profile' +# when profile optimization is applied. gen-hyprel does not support SHT_REL and +# causes a build failure. Remove profile optimization flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%, $(KBUILD_CFLAGS)) # KVM nVHE code is run at a different exception code with a different map, so # compiler instrumentation that inserts callbacks or checks into the code may |