[RFC PATCH 15/20] x86: Enable Clang's source-based code coverage

[Sasha Levin <sashal@kernel.org>]

Place the sections of Clang's source-based code coverage in the x86
linker script and allow it to be used, including for the entire
kernel, on x86_64.

Originally-by: Wentao Zhang <wentaoz5@illinois.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/Kconfig              | 2 ++
 arch/x86/kernel/vmlinux.lds.S | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a5e29ffd5ddc3..0c26d61350553 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -89,6 +89,8 @@ config X86
 	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_KCOV			if X86_64
+	select ARCH_HAS_LLVM_COV		if X86_64
+	select ARCH_HAS_LLVM_COV_PROFILE_ALL	if X86_64
 	select ARCH_HAS_KERNEL_FPU_SUPPORT
 	select ARCH_HAS_MEM_ENCRYPT
 	select ARCH_HAS_MEMBARRIER_SYNC_CORE
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 2438b89a4620a..98f41b943fe63 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -212,6 +212,8 @@ SECTIONS
 
 	BUG_TABLE
 
+	LLVM_COV_DATA
+
 	ORC_UNWIND_TABLE
 
 	/* Init code and data - will be freed after init */
-- 
2.53.0