lkml.org 
[lkml]   [2020]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2] riscv: Allow building with kcov coverage
Date
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.

Cc: Björn Töpel <bjorn.topel@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
---
arch/riscv/Kconfig | 2 ++
arch/riscv/boot/Makefile | 2 ++
arch/riscv/kernel/vdso/Makefile | 1 +
arch/riscv/mm/Makefile | 2 ++
4 files changed, 7 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 089293e4ad46..a7d7f8184f15 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -19,6 +19,7 @@ config RISCV
select ARCH_HAS_DEBUG_WX
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE
+ select ARCH_HAS_KCOV
select ARCH_HAS_MMIOWB
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SET_DIRECT_MAP
@@ -57,6 +58,7 @@ config RISCV
select HAVE_DMA_CONTIGUOUS if MMU
select HAVE_EBPF_JIT if MMU
select HAVE_FUTEX_CMPXCHG if FUTEX
+ select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO if MMU && 64BIT
select HAVE_PCI
select HAVE_PERF_EVENTS
diff --git a/arch/riscv/boot/Makefile b/arch/riscv/boot/Makefile
index 3530c59b3ea7..c59fca695f9d 100644
--- a/arch/riscv/boot/Makefile
+++ b/arch/riscv/boot/Makefile
@@ -14,6 +14,8 @@
# 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

targets := Image loader
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index 29cf052f6541..4b0d3bcc44e5 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -29,6 +29,7 @@ CPPFLAGS_vdso.lds += -P -C -U$(ARCH)

# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
+KCOV_INSTRUMENT := n

# Force dependency
$(obj)/vdso.o: $(obj)/vdso.so
diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
index 363ef01c30b1..c0185e556ca5 100644
--- a/arch/riscv/mm/Makefile
+++ b/arch/riscv/mm/Makefile
@@ -5,6 +5,8 @@ ifdef CONFIG_FTRACE
CFLAGS_REMOVE_init.o = -pg
endif

+KCOV_INSTRUMENT_init.o := n
+
obj-y += init.o
obj-y += extable.o
obj-$(CONFIG_MMU) += fault.o pageattr.o
--
2.27.0
\
 
 \ /
  Last update: 2020-06-26 14:43    [W:0.054 / U:1.708 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site