linux-kernel - Re: [PATCHv6 2/3] firmware/qcom_scm: Add scm call to handle smmu errata

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Date:   Wed, 18 Sep 2019 17:53:25 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>, Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Will Deacon <will@...nel.org>, bjorn.andersson@...aro.org,
        iommu@...ts.linux-foundation.org
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: Re: [PATCHv6 2/3] firmware/qcom_scm: Add scm call to handle smmu errata

Quoting Sai Prakash Ranjan (2019-09-17 02:45:03)
> From: Vivek Gautam <vivek.gautam@...eaurora.org>
> 
> Qcom's smmu-500 needs to toggle wait-for-safe sequence to
> handle TLB invalidation sync's.
> Few firmwares allow doing that through SCM interface.
> Add API to toggle wait for safe from firmware through a
> SCM call.
> 
> Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>