From 2363088eba2ecccfb643725e4864af73c4226a04 Mon Sep 17 00:00:00 2001
From: Feiyang Chen <chenfeiyang@loongson.cn>
Date: Wed, 6 Sep 2023 22:53:55 +0800
Subject: [PATCH] LoongArch: Allow building with kcov coverage
Add ARCH_HAS_KCOV and HAVE_GCC_PLUGINS to the LoongArch Kconfig. And
also disable instrumentation of vdso.
Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
Documentation/features/debug/kcov/arch-support.txt | 2 +-
arch/loongarch/Kconfig | 2 ++
arch/loongarch/vdso/Makefile | 2 ++
3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/features/debug/kcov/arch-support.txt b/Documentation/features/debug/kcov/arch-support.txt
index ffcc9f2b1d74d..de84cefbcdd36 100644
--- a/Documentation/features/debug/kcov/arch-support.txt
+++ b/Documentation/features/debug/kcov/arch-support.txt
@@ -13,7 +13,7 @@
| csky: | TODO |
| hexagon: | TODO |
| ia64: | TODO |
- | loongarch: | TODO |
+ | loongarch: | ok |
| m68k: | TODO |
| microblaze: | TODO |
| mips: | ok |
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index b02e399b1cd72..6cda4843f93bd 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -13,6 +13,7 @@ config LOONGARCH
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_CPU_FINALIZE_INIT
select ARCH_HAS_FORTIFY_SOURCE
+ select ARCH_HAS_KCOV
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_PTE_SPECIAL
@@ -116,6 +117,7 @@ config LOONGARCH
select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER
+ select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO
select HAVE_HW_BREAKPOINT if PERF_EVENTS
select HAVE_IOREMAP_PROT
diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile
index a50308b6fc259..d8b75f07c869e 100644
--- a/arch/loongarch/vdso/Makefile
+++ b/arch/loongarch/vdso/Makefile
@@ -1,6 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
# Objects to go into the VDSO.
+KCOV_INSTRUMENT := n
+
# Include the generic Makefile to check the built vdso.
include $(srctree)/lib/vdso/Makefile
--
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