linux-kernel - [PATCH v2 4/4] x86: enable llvm-cov support

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Message-ID: <20240905043245.1389509-5-wentaoz5@illinois.edu>
Date: Wed,  4 Sep 2024 23:32:45 -0500
From: Wentao Zhang <wentaoz5@...inois.edu>
To: wentaoz5@...inois.edu
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Subject: [PATCH v2 4/4] x86: enable llvm-cov support

Set ARCH_HAS_* options to "y" in kconfig and include section description in
linker script.

Signed-off-by: Wentao Zhang <wentaoz5@...inois.edu>
Reviewed-by: Chuck Wolber <chuck.wolber@...ing.com>
Tested-by: Chuck Wolber <chuck.wolber@...ing.com>
---
 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 007bab9f2..e0a8f7b42 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -85,6 +85,8 @@ 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 6e73403e8..904337722 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -191,6 +191,8 @@ SECTIONS
 
 	BUG_TABLE
 
+	LLVM_COV_DATA
+
 	ORC_UNWIND_TABLE
 
 	. = ALIGN(PAGE_SIZE);
-- 
2.45.2