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From: Dmitry Osipenko <>
To: Mikko Perttunen <>
Cc: Thierry Reding <>,
	Jonathan Hunter <>,
	Peter De Schrijver <>,,
Subject: Re: [RFC PATCH v1] memory: tegra: Block DMA for clients HW on a faulty memory access
Date: Sun, 05 Aug 2018 03:37:26 +0300	[thread overview]
Message-ID: <1797693.ge5mZLuUEu@dimapc> (raw)
In-Reply-To: <>

On Sunday, 5 August 2018 03:11:57 MSK Mikko Perttunen wrote:
> One potential issue is with host1x clients where userspace processes can
> submit jobs with invalid memory accesses (addresses not mapped to
> IOMMU). If when such a failure happens, we disable the DMA for the whole
> host1x client, unrelated userspace processes may see failures even
> though there is no problem with their jobs.

Good point, I'll take a look at partial resurrection of patch [0]. Anyway I 
think it's still better to fail even the unrelated jobs, rather than to have 
corrupted memory.


      reply	other threads:[~2018-08-05  0:37 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08 16:58 Dmitry Osipenko
2018-08-04 11:53 ` Dmitry Osipenko
2018-08-05  0:11   ` Mikko Perttunen
2018-08-05  0:37     ` Dmitry Osipenko [this message]

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