linux-kernel - Re: [PATCH v2 09/13] arm64: mm: Refactor flush_tlb_page() to use __tlbi_level

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Message-ID: <20260127122521.00007d48@huawei.com>
Date: Tue, 27 Jan 2026 12:25:21 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Ryan Roberts <ryan.roberts@....com>
CC: Will Deacon <will@...nel.org>, Ard Biesheuvel <ardb@...nel.org>, Catalin
 Marinas <catalin.marinas@....com>, Mark Rutland <mark.rutland@....com>, Linus
 Torvalds <torvalds@...ux-foundation.org>, Oliver Upton
	<oliver.upton@...ux.dev>, Marc Zyngier <maz@...nel.org>, "Dev Jain"
	<dev.jain@....com>, Linu Cherian <Linu.Cherian@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 09/13] arm64: mm: Refactor flush_tlb_page() to use
 __tlbi_level_asid()

On Mon, 19 Jan 2026 17:21:56 +0000
Ryan Roberts <ryan.roberts@....com> wrote:

> Now that we have __tlbi_level_asid(), let's refactor the
> *flush_tlb_page*() variants to use it rather than open coding.
> 
> The emitted tlbi(s) is/are intended to be exactly the same as before; no
> TTL hint is provided. Although the spec for flush_tlb_page() allows for
> setting the TTL hint to 3, it turns out that
> flush_tlb_fix_spurious_fault_pmd() depends on
> local_flush_tlb_page_nonotify() to invalidate the level 2 entry. This
> will be fixed separately.
> 
> Reviewed-by: Linu Cherian <linu.cherian@....com>
> Signed-off-by: Ryan Roberts <ryan.roberts@....com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>