linux-kernel - [PATCH] arm64/mm: Consolidate TCR

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Message-ID: <20221021222811.2366215-1-eugenis@google.com>
Date:   Fri, 21 Oct 2022 15:28:11 -0700
From:   Evgenii Stepanov <eugenis@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] arm64/mm: Consolidate TCR_EL1 fields

From: Anshuman Khandual <anshuman.khandual@....com>

commit e921da6bc7cac5f0e8458fe5df18ae08eb538f54 upstream.

This renames and moves SYS_TCR_EL1_TCMA1 and SYS_TCR_EL1_TCMA0 definitions
into pgtable-hwdef.h thus consolidating all TCR fields in a single header.
This does not cause any functional change.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Acked-by: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
Link: https://lore.kernel.org/r/1643121513-21854-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@...nel.org>
---
 arch/arm64/include/asm/pgtable-hwdef.h | 2 ++
 arch/arm64/include/asm/sysreg.h        | 4 ----
 arch/arm64/mm/proc.S                   | 2 +-
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 40085e53f573..66671ff05183 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -273,6 +273,8 @@
 #define TCR_NFD1		(UL(1) << 54)
 #define TCR_E0PD0		(UL(1) << 55)
 #define TCR_E0PD1		(UL(1) << 56)
+#define TCR_TCMA0		(UL(1) << 57)
+#define TCR_TCMA1		(UL(1) << 58)
 
 /*
  * TTBR.
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 394fc5998a4b..f79f3720e4cb 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -1094,10 +1094,6 @@
 #define CPACR_EL1_ZEN_EL0EN	(BIT(17)) /* enable EL0 access, if EL1EN set */
 #define CPACR_EL1_ZEN		(CPACR_EL1_ZEN_EL1EN | CPACR_EL1_ZEN_EL0EN)
 
-/* TCR EL1 Bit Definitions */
-#define SYS_TCR_EL1_TCMA1	(BIT(58))
-#define SYS_TCR_EL1_TCMA0	(BIT(57))
-
 /* GCR_EL1 Definitions */
 #define SYS_GCR_EL1_RRND	(BIT(16))
 #define SYS_GCR_EL1_EXCL_MASK	0xffffUL
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index d35c90d2e47a..50bbed947bec 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -46,7 +46,7 @@
 #endif
 
 #ifdef CONFIG_KASAN_HW_TAGS
-#define TCR_MTE_FLAGS SYS_TCR_EL1_TCMA1 | TCR_TBI1 | TCR_TBID1
+#define TCR_MTE_FLAGS TCR_TCMA1 | TCR_TBI1 | TCR_TBID1
 #else
 /*
  * The mte_zero_clear_page_tags() implementation uses DC GZVA, which relies on
-- 
2.38.0.135.g90850a2211-goog