linux-kernel - [PATCH AUTOSEL 6.8 17/30] arm64/sysreg: Update PIE permission encodings

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Date: Mon, 27 May 2024 10:13:26 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Shiqi Liu <shiqiliu@...t.edu.cn>,
	Marc Zyngier <maz@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	broonie@...nel.org,
	anshuman.khandual@....com,
	suzuki.poulose@....com,
	miguel.luis@...cle.com,
	joey.gouly@....com,
	oliver.upton@...ux.dev,
	jingzhangos@...gle.com,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.8 17/30] arm64/sysreg: Update PIE permission encodings

From: Shiqi Liu <shiqiliu@...t.edu.cn>

[ Upstream commit 12d712dc8e4f1a30b18f8c3789adfbc07f5eb050 ]

Fix left shift overflow issue when the parameter idx is greater than or
equal to 8 in the calculation of perm in PIRx_ELx_PERM macro.

Fix this by modifying the encoding to use a long integer type.

Signed-off-by: Shiqi Liu <shiqiliu@...t.edu.cn>
Acked-by: Marc Zyngier <maz@...nel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@....com>
Link: https://lore.kernel.org/r/20240421063328.29710-1-shiqiliu@hust.edu.cn
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/include/asm/sysreg.h       | 24 ++++++++++++------------
 tools/arch/arm64/include/asm/sysreg.h | 24 ++++++++++++------------
 2 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index c3b19b376c867..5396176d23b7e 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -1036,18 +1036,18 @@
  * Permission Indirection Extension (PIE) permission encodings.
  * Encodings with the _O suffix, have overlays applied (Permission Overlay Extension).
  */
-#define PIE_NONE_O	0x0
-#define PIE_R_O		0x1
-#define PIE_X_O		0x2
-#define PIE_RX_O	0x3
-#define PIE_RW_O	0x5
-#define PIE_RWnX_O	0x6
-#define PIE_RWX_O	0x7
-#define PIE_R		0x8
-#define PIE_GCS		0x9
-#define PIE_RX		0xa
-#define PIE_RW		0xc
-#define PIE_RWX		0xe
+#define PIE_NONE_O	UL(0x0)
+#define PIE_R_O		UL(0x1)
+#define PIE_X_O		UL(0x2)
+#define PIE_RX_O	UL(0x3)
+#define PIE_RW_O	UL(0x5)
+#define PIE_RWnX_O	UL(0x6)
+#define PIE_RWX_O	UL(0x7)
+#define PIE_R		UL(0x8)
+#define PIE_GCS		UL(0x9)
+#define PIE_RX		UL(0xa)
+#define PIE_RW		UL(0xc)
+#define PIE_RWX		UL(0xe)
 
 #define PIRx_ELx_PERM(idx, perm)	((perm) << ((idx) * 4))
 
diff --git a/tools/arch/arm64/include/asm/sysreg.h b/tools/arch/arm64/include/asm/sysreg.h
index ccc13e9913760..cd8420e8c3ad8 100644
--- a/tools/arch/arm64/include/asm/sysreg.h
+++ b/tools/arch/arm64/include/asm/sysreg.h
@@ -701,18 +701,18 @@
  * Permission Indirection Extension (PIE) permission encodings.
  * Encodings with the _O suffix, have overlays applied (Permission Overlay Extension).
  */
-#define PIE_NONE_O	0x0
-#define PIE_R_O		0x1
-#define PIE_X_O		0x2
-#define PIE_RX_O	0x3
-#define PIE_RW_O	0x5
-#define PIE_RWnX_O	0x6
-#define PIE_RWX_O	0x7
-#define PIE_R		0x8
-#define PIE_GCS		0x9
-#define PIE_RX		0xa
-#define PIE_RW		0xc
-#define PIE_RWX		0xe
+#define PIE_NONE_O	UL(0x0)
+#define PIE_R_O		UL(0x1)
+#define PIE_X_O		UL(0x2)
+#define PIE_RX_O	UL(0x3)
+#define PIE_RW_O	UL(0x5)
+#define PIE_RWnX_O	UL(0x6)
+#define PIE_RWX_O	UL(0x7)
+#define PIE_R		UL(0x8)
+#define PIE_GCS		UL(0x9)
+#define PIE_RX		UL(0xa)
+#define PIE_RW		UL(0xc)
+#define PIE_RWX		UL(0xe)
 
 #define PIRx_ELx_PERM(idx, perm)	((perm) << ((idx) * 4))
 
-- 
2.43.0