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riscv: Allow building with kcov coverage

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Add ARCH_HAS_KCOV and HAVE_GCC_PLUGINS to the riscv Kconfig.
Also disable instrumentation of some early boot code and vdso.

Boot-tested on QEMU's riscv64 virt machine.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Tobias Klauser 2020-06-26 14:40:56 +02:00 committed by Palmer Dabbelt
parent ed48b297fe
commit 20d38f7c45
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GPG Key ID: 2E1319F35FBB1889
4 changed files with 7 additions and 0 deletions
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2
arch/riscv/Kconfig
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@ -19,6 +19,7 @@ config RISCV
select ARCH_HAS_DEBUG_WX select ARCH_HAS_DEBUG_WX
select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_GIGANTIC_PAGE
select ARCH_HAS_KCOV
select ARCH_HAS_MMIOWB select ARCH_HAS_MMIOWB
select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SET_DIRECT_MAP select ARCH_HAS_SET_DIRECT_MAP
@ -58,6 +59,7 @@ config RISCV
select HAVE_DMA_CONTIGUOUS if MMU select HAVE_DMA_CONTIGUOUS if MMU
select HAVE_EBPF_JIT if MMU select HAVE_EBPF_JIT if MMU
select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO if MMU && 64BIT select HAVE_GENERIC_VDSO if MMU && 64BIT
select HAVE_PCI select HAVE_PCI
select HAVE_PERF_EVENTS select HAVE_PERF_EVENTS

2
arch/riscv/boot/Makefile
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@ -14,6 +14,8 @@
# Based on the ia64 and arm64 boot/Makefile. # Based on the ia64 and arm64 boot/Makefile.
# #
KCOV_INSTRUMENT := n
OBJCOPYFLAGS_Image :=-O binary -R .note -R .note.gnu.build-id -R .comment -S OBJCOPYFLAGS_Image :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
targets := Image loader targets := Image loader

1
arch/riscv/kernel/vdso/Makefile
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@ -32,6 +32,7 @@ CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os
# Disable gcov profiling for VDSO code # Disable gcov profiling for VDSO code
GCOV_PROFILE := n GCOV_PROFILE := n
KCOV_INSTRUMENT := n
# Force dependency # Force dependency
$(obj)/vdso.o: $(obj)/vdso.so $(obj)/vdso.o: $(obj)/vdso.so

2
arch/riscv/mm/Makefile
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@ -5,6 +5,8 @@ ifdef CONFIG_FTRACE
CFLAGS_REMOVE_init.o = -pg CFLAGS_REMOVE_init.o = -pg
endif endif
KCOV_INSTRUMENT_init.o := n
obj-y += init.o obj-y += init.o
obj-y += extable.o obj-y += extable.o
obj-$(CONFIG_MMU) += fault.o pageattr.o obj-$(CONFIG_MMU) += fault.o pageattr.o