linux-kernel - Re: [PATCH RESEND] iommu/arm-smmu-v3: Remove IAS

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Message-ID: <176782095435.3284849.16107001420143134229.b4-ty@kernel.org>
Date: Wed,  7 Jan 2026 21:59:11 +0000
From: Will Deacon <will@...nel.org>
To: iommu@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Mostafa Saleh <smostafa@...gle.com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	robin.murphy@....com,
	joro@...tes.org,
	Tomasz Nowicki <tnowicki@...gle.com>
Subject: Re: [PATCH RESEND] iommu/arm-smmu-v3: Remove IAS

On Fri, 02 Jan 2026 20:53:52 +0000, Mostafa Saleh wrote:
> The driver only supports AArch64 page tables where OAS == IAS.
> 
> Remove the extra IAS tracking for AArch32 as this feature was
> never implemented and that was creating BAD_STEs for SMMUv3
> with stage-2 and OAS < 40.
> 
> Further discussion on this in:
> https://lore.kernel.org/linux-iommu/20251130194506.593700-1-smostafa@google.com/
> 
> [...]

Applied to iommu (arm/smmu/updates), thanks!

[1/1] iommu/arm-smmu-v3: Remove IAS
      https://git.kernel.org/iommu/c/5ac66ed8417f

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev