From: Brian Masney <bmasney@redhat.com>
To: Konrad Dybcio <konrad.dybcio@somainline.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
jamipkettunen@somainline.org, iommu@lists.linux-foundation.org,
martin.botka@somainline.org,
~postmarketos/upstreaming@lists.sr.ht,
angelogioacchino.delregno@somainline.org,
marijn.suijten@somainline.org, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 5/6] iommu/qcom: Index contexts by asid number to allow asid 0
Date: Fri, 3 Jun 2022 11:14:51 -0400 [thread overview]
Message-ID: <Ypola4mBuQ6zDLcz@xps13> (raw)
In-Reply-To: <20220527212901.29268-6-konrad.dybcio@somainline.org>
On Fri, May 27, 2022 at 11:29:00PM +0200, Konrad Dybcio wrote:
> From: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
>
> This driver was indexing the contexts by asid-1, which is probably
> done under the assumption that the first ASID is always 1.
>
> Unfortunately this is not entirely true: at least in the MSM8956
> and MSM8976 GPU IOMMU, the gpu_user context's ASID number is zero.
> To allow using an asid number of zero, stop indexing the contexts
> by asid-1 and rather index them by asid.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
> Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
msm8974 will need this as well.
Reviewed-by: Brian Masney <bmasney@redhat.com>
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2022-06-03 15:25 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-27 21:28 [PATCH 0/6] Fix and extend Qualcomm IOMMU support Konrad Dybcio
2022-05-27 21:28 ` [PATCH 1/6] iommu/qcom: Use the asid read from device-tree if specified Konrad Dybcio
2022-05-31 15:46 ` Will Deacon
2022-05-31 16:15 ` Rob Clark
2022-05-31 16:19 ` Will Deacon
2022-05-31 20:57 ` Rob Clark
2022-06-03 18:03 ` Konrad Dybcio
2022-06-08 10:25 ` AngeloGioacchino Del Regno
2022-05-27 21:28 ` [PATCH 2/6] iommu/qcom: Write TCR before TTBRs to fix ASID access behavior Konrad Dybcio
2022-05-31 15:55 ` Will Deacon
2022-05-31 16:26 ` Robin Murphy
2022-06-05 22:06 ` Marijn Suijten
2022-06-08 10:27 ` AngeloGioacchino Del Regno
2022-06-08 10:54 ` Robin Murphy
2022-06-08 11:03 ` AngeloGioacchino Del Regno
2022-05-27 21:28 ` [PATCH 3/6] iommu/qcom: Properly reset the IOMMU context Konrad Dybcio
2022-05-27 21:28 ` [PATCH 4/6] iommu/qcom: Add support for AArch64 IOMMU pagetables Konrad Dybcio
2022-05-28 2:03 ` kernel test robot
2022-06-02 14:17 ` Rob Herring
2022-05-27 21:29 ` [PATCH 5/6] iommu/qcom: Index contexts by asid number to allow asid 0 Konrad Dybcio
2022-06-03 15:14 ` Brian Masney [this message]
2022-05-27 21:29 ` [PATCH 6/6] iommu/qcom: Add support for QCIOMMUv2 and QCIOMMU-500 secured contexts Konrad Dybcio
-- strict thread matches above, loose matches on Subject: below --
2019-09-26 12:05 [PATCH 0/6] Add support for QCOM IOMMU v2 and 500 kholk11
2019-09-26 12:05 ` [PATCH 5/6] iommu/qcom: Index contexts by asid number to allow asid 0 kholk11
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=Ypola4mBuQ6zDLcz@xps13 \
--to=bmasney@redhat.com \
--cc=angelogioacchino.delregno@somainline.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jamipkettunen@somainline.org \
--cc=konrad.dybcio@somainline.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marijn.suijten@somainline.org \
--cc=martin.botka@somainline.org \
--cc=robin.murphy@arm.com \
--cc=will@kernel.org \
--cc=~postmarketos/upstreaming@lists.sr.ht \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox