linux-kernel - [PATCH] arm64/hw_breakpoint: Determine lengths from generic perf breakpoint macros

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Message-Id: <20240226042249.4098185-1-anshuman.khandual@arm.com>
Date: Mon, 26 Feb 2024 09:52:49 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-arm-kernel@...ts.infradead.org
Cc: broonie@...nel.org,
	mark.rutland@....com,
	Anshuman Khandual <anshuman.khandual@....com>,
	Will Deacon <will@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64/hw_breakpoint: Determine lengths from generic perf breakpoint macros

Both platform i.e ARM_BREAKPOINT_LEN_X and generic i.e HW_BREAKPOINT_LEN_X
macros are used interchangeably to convert event->attr.bp_len and platform
breakpoint control arch_hw_breakpoint_ctrl->len. Let's be consistent while
deriving one from the other. This does not cause any functional changes.

Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
This applies on v6.8-rc5

 arch/arm64/kernel/hw_breakpoint.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index 35225632d70a..1ab9fc865ddd 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -301,28 +301,28 @@ static int get_hbp_len(u8 hbp_len)
 
 	switch (hbp_len) {
 	case ARM_BREAKPOINT_LEN_1:
-		len_in_bytes = 1;
+		len_in_bytes = HW_BREAKPOINT_LEN_1;
 		break;
 	case ARM_BREAKPOINT_LEN_2:
-		len_in_bytes = 2;
+		len_in_bytes = HW_BREAKPOINT_LEN_2;
 		break;
 	case ARM_BREAKPOINT_LEN_3:
-		len_in_bytes = 3;
+		len_in_bytes = HW_BREAKPOINT_LEN_3;
 		break;
 	case ARM_BREAKPOINT_LEN_4:
-		len_in_bytes = 4;
+		len_in_bytes = HW_BREAKPOINT_LEN_4;
 		break;
 	case ARM_BREAKPOINT_LEN_5:
-		len_in_bytes = 5;
+		len_in_bytes = HW_BREAKPOINT_LEN_5;
 		break;
 	case ARM_BREAKPOINT_LEN_6:
-		len_in_bytes = 6;
+		len_in_bytes = HW_BREAKPOINT_LEN_6;
 		break;
 	case ARM_BREAKPOINT_LEN_7:
-		len_in_bytes = 7;
+		len_in_bytes = HW_BREAKPOINT_LEN_7;
 		break;
 	case ARM_BREAKPOINT_LEN_8:
-		len_in_bytes = 8;
+		len_in_bytes = HW_BREAKPOINT_LEN_8;
 		break;
 	}
 
-- 
2.25.1