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KCOV is code coverage collection facility used, in particular, by syzkaller system call fuzzer. There is some interest in using syzkaller on arm devices. So port KCOV to arm. On implementation level this merely declares that KCOV is supported and disables instrumentation of 3 special cases. Reasons for disabling are commented in code. Tested with qemu-system-arm/vexpress-a15. Link: http://lkml.kernel.org/r/20180511143248.112484-1-dvyukov@google.com Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Abbott Liu <liuwenliang@huawei.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Koguchi Takuo <takuo.koguchi.sw@hitachi.com> Cc: <syzkaller@googlegroups.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
34 lines
1.0 KiB
Makefile
34 lines
1.0 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for Kernel-based Virtual Machine module, HYP part
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#
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ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING
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KVM=../../../../virt/kvm
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CFLAGS_ARMV7VE :=$(call cc-option, -march=armv7ve)
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obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v3-sr.o
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obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/timer-sr.o
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obj-$(CONFIG_KVM_ARM_HOST) += tlb.o
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obj-$(CONFIG_KVM_ARM_HOST) += cp15-sr.o
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obj-$(CONFIG_KVM_ARM_HOST) += vfp.o
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obj-$(CONFIG_KVM_ARM_HOST) += banked-sr.o
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CFLAGS_banked-sr.o += $(CFLAGS_ARMV7VE)
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obj-$(CONFIG_KVM_ARM_HOST) += entry.o
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obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o
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obj-$(CONFIG_KVM_ARM_HOST) += switch.o
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CFLAGS_switch.o += $(CFLAGS_ARMV7VE)
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obj-$(CONFIG_KVM_ARM_HOST) += s2-setup.o
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# KVM code is run at a different exception code with a different map, so
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# compiler instrumentation that inserts callbacks or checks into the code may
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# cause crashes. Just disable it.
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GCOV_PROFILE := n
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KASAN_SANITIZE := n
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UBSAN_SANITIZE := n
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KCOV_INSTRUMENT := n
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