From: Dmitry Osipenko <digetx@gmail.com>
To: Mikko Perttunen <cyndis@kapsi.fi>
Cc: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Peter De Schrijver <pdeschrijver@nvidia.com>,
linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
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: <89f0794e-affa-dba0-9684-582ce5570cad@kapsi.fi>
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.
[0] https://github.com/grate-driver/linux/commit/
c0351a9d01491af2b2fefc162de1c2e4fcfaa94c#diff-20226be476307cb7ec9f60e26a9c30deR378
prev parent 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 [RFC PATCH v1] memory: tegra: Block DMA for clients HW on a faulty memory access 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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1797693.ge5mZLuUEu@dimapc \
--to=digetx@gmail.com \
--cc=cyndis@kapsi.fi \
--cc=jonathanh@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=pdeschrijver@nvidia.com \
--cc=thierry.reding@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.