From: Robin Murphy <robin.murphy@arm.com>
To: Will Deacon <will@kernel.org>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
Akhil P Oommen <akhilpo@codeaurora.org>,
iommu@lists.linux-foundation.org,
"Kristian H . Kristensen" <hoegsberg@google.com>,
freedreno@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv4 1/6] iommu/io-pgtable-arm: Add support to use system cache
Date: Mon, 21 Sep 2020 23:03:49 +0100 [thread overview]
Message-ID: <9646dd4f-f1e6-992d-b8a0-0f2c14fa9fe8@arm.com> (raw)
In-Reply-To: <20200921180318.GG3141@willie-the-truck>
On 2020-09-21 19:03, Will Deacon wrote:
> On Fri, Sep 11, 2020 at 07:57:18PM +0530, Sai Prakash Ranjan wrote:
>> Add a quirk IO_PGTABLE_QUIRK_SYS_CACHE to override the
>> attributes set in TCR for the page table walker when
>> using system cache.
>
> I wonder if the panfrost folks can reuse this for the issue discussed
> over at:
>
> https://lore.kernel.org/r/cover.1600213517.git.robin.murphy@arm.com
Isn't this all hinged around the outer cacheability attribute, rather
than shareability (since these are nominally NC mappings and thus
already properly Osh)? The Panfrost issue is just about shareability
domains being a bit wonky; the cacheability attributes there are
actually reasonably normal (other than not having a non-cacheable type
at all, only a choice of allocation policies...)
Robin.
> However, Sai, your email setup went wrong when you posted this so you
> probably need to repost now that you have that fixed.
>
> Will
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
>
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next prev parent reply other threads:[~2020-09-21 22:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1599832685.git.saiprakash.ranjan@codeaurora.org>
2020-09-11 14:27 ` [PATCHv4 1/6] iommu/io-pgtable-arm: Add support to use system cache Sai Prakash Ranjan
2020-09-11 14:27 ` [PATCHv4 2/6] iommu/arm-smmu: Add domain attribute for " Sai Prakash Ranjan
2020-09-11 14:28 ` [PATCHv4 3/6] drm/msm: rearrange the gpu_rmw() function Sai Prakash Ranjan
2020-09-11 14:28 ` [PATCHv4 4/6] drm/msm/a6xx: Add support for using system cache(LLC) Sai Prakash Ranjan
2020-09-11 14:28 ` [PATCHv4 5/6] iommu: arm-smmu-impl: Use table to list QCOM implementations Sai Prakash Ranjan
2020-09-11 14:28 ` [PATCHv4 6/6] iommu: arm-smmu-impl: Remove unwanted extra blank lines Sai Prakash Ranjan
[not found] ` <010101747d912d9f-c8050b8d-1e81-4be0-ac35-b221f657b490-000000@us-west-2.amazonses.com>
2020-09-11 16:03 ` Robin Murphy
2020-09-11 16:07 ` Will Deacon
2020-09-11 16:21 ` Sai Prakash Ranjan
2020-09-11 16:34 ` Robin Murphy
2020-09-11 16:50 ` Sai Prakash Ranjan
[not found] ` <a33160854744942f660fae691a4a30ec@codeaurora.org>
2020-09-15 6:58 ` Sai Prakash Ranjan
2020-09-11 16:19 ` Sai Prakash Ranjan
[not found] ` <3b1beb6cf6a34a44b0ecff9ec5a2105b5ff91bd4.1599832685.git.saiprakash.ranjan@codeaurora.org>
2020-09-21 18:03 ` [PATCHv4 1/6] iommu/io-pgtable-arm: Add support to use system cache Will Deacon
2020-09-21 22:03 ` Robin Murphy [this message]
2020-09-21 22:23 ` Will Deacon
2020-09-22 6:23 ` Sai Prakash Ranjan
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