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From: Christoph Hellwig <hch@infradead.org>
To: Sibi Sankar <sibis@codeaurora.org>
Cc: bjorn.andersson@linaro.org, robh+dt@kernel.org, joro@8bytes.org,
	ohad@wizery.com, devicetree@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	agross@kernel.org
Subject: Re: [PATCH 0/3] Request direct mapping for modem firmware subdevice
Date: Mon, 16 Mar 2020 08:50:28 -0700
Message-ID: <20200316155028.GB18704@infradead.org> (raw)
In-Reply-To: <20200309182255.20142-1-sibis@codeaurora.org>

On Mon, Mar 09, 2020 at 11:52:52PM +0530, Sibi Sankar wrote:
> The Q6 modem sub-system has direct access to DDR through memnoc and
> an indirect access routed through a SMMU which MSS CE (crypto engine
> sub-component of MSS) uses during out of reset sequence. Request direct
> mapping for the modem-firmware subdevice since smmu is not expected
> to provide access control/translation for these SIDs (sandboxing of the
> modem is achieved through XPUs engaged using SMC calls).

Please fix your device tree so that the device isn't bound to an
IOMMU.

  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-09 18:22 Sibi Sankar
2020-03-09 18:22 ` [PATCH 1/3] iommu: Export "iommu_request_dm_for_dev" Sibi Sankar
2020-03-09 18:22 ` [PATCH 2/3] dt-bindings: remoteproc: qcom: Add modem-firmware bindings Sibi Sankar
2020-03-09 18:22 ` [PATCH 3/3] remoteproc: qcom_q6v5_mss: Request direct mapping for firmware subdevice Sibi Sankar
2020-03-10 11:23 ` [PATCH 0/3] Request direct mapping for modem " Joerg Roedel
2020-03-10 14:00   ` Sibi Sankar
2020-03-10 16:23     ` Joerg Roedel
2020-03-10 16:44       ` Robin Murphy
2020-03-12  6:28         ` Sai Prakash Ranjan
2020-03-12 12:05           ` Robin Murphy
2020-03-23  9:43             ` Sai Prakash Ranjan
2020-03-16 15:50 ` Christoph Hellwig [this message]
2020-03-16 16:37   ` Sibi Sankar

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