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From: Will Deacon <>
	Jean-Philippe Brucker <>,
	Will Deacon <>
Subject: Re: [PATCH v2] iommu/arm-smmu-v3: Don't reserve implementation defined register space
Date: Tue, 19 May 2020 00:04:07 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, 13 May 2020 13:02:57 +0200, Jean-Philippe Brucker wrote:
> Some SMMUv3 implementation embed the Perf Monitor Group Registers (PMCG)
> inside the first 64kB region of the SMMU. Since PMCG are managed by a
> separate driver, this layout causes resource reservation conflicts
> during boot.
> To avoid this conflict, don't reserve the MMIO regions that are
> implementation defined. Although devm_ioremap_resource() still works on
> full pages under the hood, this way we benefit from resource conflict
> checks.

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu-v3: Don't reserve implementation defined register space

iommu mailing list

      parent reply	other threads:[~2020-05-18 23:04 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-13 11:02 [PATCH v2] iommu/arm-smmu-v3: Don't reserve implementation defined register space Jean-Philippe Brucker
2020-05-13 12:17 ` Robin Murphy
2020-05-18 23:04 ` Will Deacon [this message]

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