linux-kernel - [PATCH 00/10] arm64: Replace TLB invalidation preprocessor macros with C functions

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Message-Id: <20250711161732.384-1-will@kernel.org>
Date: Fri, 11 Jul 2025 17:17:22 +0100
From: Will Deacon <will@...nel.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org,
	Will Deacon <will@...nel.org>,
	Ard Biesheuvel <ardb@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Ryan Roberts <ryan.roberts@....com>,
	Mark Rutland <mark.rutland@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Marc Zyngier <maz@...nel.org>
Subject: [PATCH 00/10] arm64: Replace TLB invalidation preprocessor macros with C functions

Hi all,

I cooked this series following a complaint from Linus back in March
about our range-based TLB invalidation macro after we fixed an
over-invalidation bug thanks to incorrect handling of its arguments:

  https://lore.kernel.org/all/CAHk-=wgiX0q0WCL+SFwVCYtG7JR3=2Rshse-5J3AO2Y4AgT7Jw@mail.gmail.com/

Once I started trying to rework the range macro into a C function, I
spotted a few other opportunities for cleanup and so I've ended up with
this series.

Testing and feedback welcome.

Cheers,

Will

Cc: Ard Biesheuvel <ardb@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Ryan Roberts <ryan.roberts@....com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oliver Upton <oliver.upton@...ux.dev>
Cc: Marc Zyngier <maz@...nel.org>

--->8

Will Deacon (10):
  arm64: mm: Introduce a C wrapper for by-level TLB invalidation helpers
  arm64: mm: Introduce a C wrapper for by-range TLB invalidation helpers
  arm64: mm: Implicitly invalidate user ASID based on TLBI operation
  arm64: mm: Remove unused 'tlbi_user' argument from
    __flush_tlb_range_op()
  arm64: mm: Re-implement the __tlbi_level macro in C
  arm64: mm: Simplify __TLBI_RANGE_NUM() macro
  arm64: mm: Push __TLBI_VADDR() into __tlbi_level()
  arm64: mm: Inline __TLBI_VADDR_RANGE() into __tlbi_range()
  arm64: mm: Simplify __flush_tlb_range_limit_excess()
  arm64: mm: Re-implement the __flush_tlb_range_op macro in C

 arch/arm64/include/asm/tlbflush.h | 230 ++++++++++++++++++------------
 arch/arm64/kernel/sys_compat.c    |   2 +-
 arch/arm64/kvm/hyp/nvhe/mm.c      |   2 +-
 arch/arm64/kvm/hyp/pgtable.c      |   4 +-
 4 files changed, 140 insertions(+), 98 deletions(-)

-- 
2.50.0.727.gbf7dc18ff4-goog