[PATCH v5 23/29] KVM: arm64: disable LTO for the nVHE directory
From: Sami Tolvanen <samitolvanen@google.com>
Date: 2020-10-09 16:15:30
Also in:
linux-arch, linux-kbuild, linux-pci, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
We use objcopy to manipulate ELF binaries for the nVHE code, which fails with LTO as the compiler produces LLVM bitcode instead. Disable LTO for this code to allow objcopy to be used. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <redacted> --- arch/arm64/kvm/hyp/nvhe/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile
index aef76487edc2..c903c8f31280 100644
--- a/arch/arm64/kvm/hyp/nvhe/Makefile
+++ b/arch/arm64/kvm/hyp/nvhe/Makefile@@ -45,9 +45,9 @@ quiet_cmd_hypcopy = HYPCOPY $@ --rename-section=.text=.hyp.text \ $< $@ -# Remove ftrace and Shadow Call Stack CFLAGS. +# Remove ftrace, LTO, and Shadow Call Stack CFLAGS. # This is equivalent to the 'notrace' and '__noscs' annotations. -KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_LTO) $(CC_FLAGS_SCS), $(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
--
2.28.0.1011.ga647a8990f-goog
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel