linux-kernel - [PATCH 03/13] arm64/sysreg: add system register POR

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Message-Id: <20231209-b4-arm64-sysreg-additions-v1-3-45284e538474@kernel.org>
Date:   Sat, 09 Dec 2023 01:02:49 +0000
From:   broonie@...nel.org
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Fuad Tabba <tabba@...gle.com>, Joey Gouly <joey.gouly@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 03/13] arm64/sysreg: add system register POR_EL{0,1}

From: Joey Gouly <joey.gouly@....com>

Add POR_EL{0,1} according to DDI0601 2023-03.

Signed-off-by: Joey Gouly <joey.gouly@....com>
Reviewed-by: Mark Brown <broonie@...nel.org>
Acked-by: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 arch/arm64/include/asm/sysreg.h | 13 +++++++++++++
 arch/arm64/tools/sysreg         | 12 ++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 5e65f51c10d2..9c2caf0efdc7 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -1039,6 +1039,19 @@
 
 #define PIRx_ELx_PERM(idx, perm)	((perm) << ((idx) * 4))
 
+/*
+ * Permission Overlay Extension (POE) permission encodings.
+ */
+#define POE_NONE	UL(0x0)
+#define POE_R		UL(0x1)
+#define POE_X		UL(0x2)
+#define POE_RX		UL(0x3)
+#define POE_W		UL(0x4)
+#define POE_RW		UL(0x5)
+#define POE_XW		UL(0x6)
+#define POE_RXW		UL(0x7)
+#define POE_MASK	UL(0xf)
+
 #define ARM64_FEATURE_FIELD_BITS	4
 
 /* Defined for compatibility only, do not add new users. */
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index 145b33f75a96..1d371a24da6e 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg
@@ -2555,6 +2555,18 @@ Sysreg	PIR_EL2		3	4	10	2	3
 Fields	PIRx_ELx
 EndSysreg
 
+Sysreg	POR_EL0		3	3	10	2	4
+Fields	PIRx_ELx
+EndSysreg
+
+Sysreg	POR_EL1		3	0	10	2	4
+Fields	PIRx_ELx
+EndSysreg
+
+Sysreg	POR_EL12	3	5	10	2	4
+Fields	PIRx_ELx
+EndSysreg
+
 Sysreg	LORSA_EL1	3	0	10	4	0
 Res0	63:52
 Field	51:16	SA

-- 
2.39.2