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From: Will Deacon <will@kernel.org>
To: Jordan Crouse <jcrouse@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org,
	Robin Murphy <robin.murphy@arm.com>,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	freedreno@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] iommu/arm-smmu: Add a init_context_bank implementation hook
Date: Mon, 13 Jul 2020 16:11:23 +0100	[thread overview]
Message-ID: <20200713151123.GB3072@willie-the-truck> (raw)
In-Reply-To: <20200611223656.4724-1-jcrouse@codeaurora.org>

On Thu, Jun 11, 2020 at 04:36:56PM -0600, Jordan Crouse wrote:
> Add a new implementation hook to allow the implementation specific code
> to tweek the context bank configuration just before it gets written.
> The first user will be the Adreno GPU implementation to turn on
> SCTLR.HUPCF to ensure that a page fault doesn't terminating pending
> transactions. Doing so could hang the GPU if one of the terminated
> transactions is a CP read.
> 
> This depends on the arm-smmu adreno SMMU implementation [1].
> 
> [1] https://patchwork.kernel.org/patch/11600943/
> 
> Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
> ---
> 
>  drivers/iommu/arm-smmu-qcom.c | 13 +++++++++++++
>  drivers/iommu/arm-smmu.c      | 28 +++++++++++++---------------
>  drivers/iommu/arm-smmu.h      | 11 +++++++++++
>  3 files changed, 37 insertions(+), 15 deletions(-)

This looks straightforward enough, but I don't want to merge this without
a user and Sai's series has open questions afaict.

Will
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  reply	other threads:[~2020-07-13 15:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-11 22:36 Jordan Crouse
2020-07-13 15:11 ` Will Deacon [this message]
2020-07-13 17:00   ` Jordan Crouse
2020-07-13 19:03     ` Will Deacon
2020-07-13 19:13       ` [Freedreno] " Jordan Crouse
2020-07-14  4:37         ` Sai Prakash Ranjan

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