linux-kernel - Re: [PATCH v3 3/8] iommu/arm-smmu: Consult context bank allocator for identify domains

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Date:   Fri, 11 Sep 2020 08:21:49 +0000
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Rob Clark <robdclark@...omium.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 3/8] iommu/arm-smmu: Consult context bank allocator for
 identify domains

On 2020-09-04 21:25, Bjorn Andersson wrote:
> For implementations of the ARM SMMU where stream mappings of bypass 
> type
> are prohibited identity domains can be implemented by using context
> banks with translation disabled.
> 
> Postpone the decision to skip allocating a context bank until the
> implementation specific context bank allocator has been consulted and 
> if
> it decides to use a context bank for the identity map, don't enable
> translation (i.e. omit ARM_SMMU_SCTLR_M).
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 

Minor nit in the subject: identify -> identity

Reviewed-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>

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