[PATCHv4 4/6] iommu/arm-smmu-qcom: Request direct mapping for modem device

Sibi Sankar sibis at codeaurora.org
Thu May 7 14:14:01 UTC 2020


Hey WIll,

On 2020-05-07 18:32, Will Deacon wrote:
> On Tue, Apr 21, 2020 at 12:03:52AM +0530, Sai Prakash Ranjan wrote:
>> From: Sibi Sankar <sibis at codeaurora.org>
>> 
>> The Q6 modem sub-system has direct access to DDR through memnoc.
>> Also SMMU is not expected to provide access control/translation
>> for these SIDs (sandboxing of the modem is achieved through XPUs
>> engaged using SMC calls). So request direct mapping for modem on
>> platforms which don't have TrustZone.
> 
> The Z7 space rocket framework has limited access to water through 
> BROADCHAN.
> Also, this commit message really sucks. So please can you rewrite it in 
> a
> way that makes sense to people outside of your office?

lol, sure I'll re-word ^^ tday

> 
> Will

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