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>

diff --git a/Documentation/features/debug/kcov/arch-support.txt b/Documentation/features/debug/kcov/arch-support.txt
index ffcc9f2..de84cef 100644 (file)
--- 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 b02e399..6cda484 100644 (file)
--- 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 a50308b..d8b75f0 100644 (file)
--- 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