linux-kernel - [PATCH 0/6] arm64/mm: TTBRx

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Message-Id: <20251103052618.586763-1-anshuman.khandual@arm.com>
Date: Mon,  3 Nov 2025 05:26:12 +0000
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-arm-kernel@...ts.infradead.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Ryan Roberts <ryan.roberts@....com>,
	Ard Biesheuvel <ardb@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/6] arm64/mm: TTBRx_EL1 related changes

This series contains some TTBRx_EL1 related changes, aimed at standardizing
TTBRx_EL1 register field accesses via tools sysreg format and also explains
52 PA specific handling methods via a new macro along with in code comments

This series applies on v6.18-rc4

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Ryan Roberts <ryan.roberts@....com>
Cc: Ard Biesheuvel <ardb@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org

Anshuman Khandual (6):
  arm64/mm: Directly use TTBRx_EL1_ASID_MASK
  arm64/mm: Directly use TTBRx_EL1_CnP
  arm64/mm: Represent TTBR_BADDR_MASK_52 with TTBRx_EL1_BADDR_MASK
  arm64/mm: Ensure correct 48 bit PA gets into TTBRx_EL1
  arm64/mm: Describe 52 PA folding into TTBRx_EL1
  arm64/mm: Describe TTBR1_BADDR_4852_OFFSET

 arch/arm64/include/asm/asm-uaccess.h   |  2 +-
 arch/arm64/include/asm/assembler.h     |  3 ++-
 arch/arm64/include/asm/mmu_context.h   |  2 +-
 arch/arm64/include/asm/pgtable-hwdef.h | 23 ++++++++++++++++++++---
 arch/arm64/include/asm/pgtable.h       |  5 +++--
 arch/arm64/include/asm/uaccess.h       |  6 +++---
 arch/arm64/kernel/entry.S              |  2 +-
 arch/arm64/kernel/mte.c                |  4 ++--
 arch/arm64/mm/context.c                |  8 ++++----
 arch/arm64/mm/mmu.c                    |  2 +-
 10 files changed, 38 insertions(+), 19 deletions(-)

-- 
2.30.2