From: Andreas Herrmann <andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
To: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
Cc: "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH 6/9] iommu/arm-smmu: Support buggy implemenations where all config accesses are secure
Date: Fri, 27 Sep 2013 15:48:09 +0200 [thread overview]
Message-ID: <20130927134809.GQ3315@alberich> (raw)
In-Reply-To: <20130927130527.GH9520-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
On Fri, Sep 27, 2013 at 09:05:28AM -0400, Will Deacon wrote:
> On Thu, Sep 26, 2013 at 11:36:18PM +0100, Andreas Herrmann wrote:
> > In such a case we have to use secure aliases of some non-secure
> > registers.
> >
> > This behaviour is controlled via a flag in smmu->bugs. It is set
> > based on DT information when probing an SMMU device.
>
> :(
>
> I guess my main comment is just some understanding on how things are wired.
> It's *just* the configuration access that is secure, right?
Correct.
> Device transactions are non-secure, so the existing TLB invalidation
> code will work correctly?
Yes, transactions are non-secure.
The TLB invalidation code (using SMMU_TLBIVMID for stage2) also seems
too work -- no problems triggered so far (neither with sata nor with
xgmac).
Andreas
next prev parent reply other threads:[~2013-09-27 13:48 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-26 22:36 [PATCH 0/9] arm-smmu: Misc changes/Calxeda ECX-2000 support Andreas Herrmann
[not found] ` <1380234982-1677-1-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-26 22:36 ` [PATCH 1/9] iommu/arm-smmu: Switch to arch_initcall for driver registration Andreas Herrmann
[not found] ` <1380234982-1677-2-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 8:58 ` Will Deacon
2013-09-27 9:24 ` Andreas Herrmann
2013-09-27 10:02 ` [PATCH] iommu/arm-smmu: Switch to subsys_initcall " Andreas Herrmann
2013-09-26 22:36 ` [PATCH 2/9] iommu/arm-smmu: Calculate SMMU_CB_BASE from smmu register values Andreas Herrmann
[not found] ` <1380234982-1677-3-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 9:51 ` Will Deacon
[not found] ` <20130927095157.GA9057-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 10:23 ` Andreas Herrmann
2013-09-27 10:51 ` Will Deacon
[not found] ` <20130927105153.GG9057-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 11:05 ` Andreas Herrmann
2013-09-27 11:08 ` Will Deacon
[not found] ` <20130927110832.GC9520-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 14:33 ` [PATCH] iommu/arm-smmu: Refine check for proper size of mapped region Andreas Herrmann
2013-09-26 22:36 ` [PATCH 3/9] ARM: dma-mapping: Always pass proper prot flags to iommu_map() Andreas Herrmann
[not found] ` <1380234982-1677-4-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 8:35 ` Will Deacon
2013-09-30 13:40 ` Marek Szyprowski
2013-09-26 22:36 ` [PATCH 4/9] iommu/arm-smmu: Check for num_context_irqs > 0 to avoid divide by zero exception Andreas Herrmann
[not found] ` <1380234982-1677-5-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 8:41 ` Will Deacon
[not found] ` <20130927084154.GB8319-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 9:03 ` Andreas Herrmann
2013-09-27 10:23 ` Will Deacon
[not found] ` <20130927102307.GE9057-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 10:39 ` Andreas Herrmann
2013-09-27 10:48 ` Will Deacon
[not found] ` <20130927104802.GF9057-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 11:07 ` Andreas Herrmann
2013-09-27 14:30 ` [PATCH] " Andreas Herrmann
2013-09-26 22:36 ` [PATCH 5/9] iommu/arm-smmu: Clear global and context bank fault status registers Andreas Herrmann
[not found] ` <1380234982-1677-6-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 8:52 ` Will Deacon
[not found] ` <20130927085255.GC8319-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-30 13:54 ` Andreas Herrmann
2013-09-30 13:56 ` [PATCH] " Andreas Herrmann
2013-09-30 16:06 ` Will Deacon
[not found] ` <20130930160615.GG26036-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-30 17:17 ` Andreas Herrmann
2013-09-30 18:30 ` Will Deacon
[not found] ` <20130930183006.GK26036-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-30 21:06 ` Andreas Herrmann
2013-09-26 22:36 ` [PATCH 6/9] iommu/arm-smmu: Support buggy implemenations where all config accesses are secure Andreas Herrmann
[not found] ` <1380234982-1677-7-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 13:05 ` Will Deacon
[not found] ` <20130927130527.GH9520-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 13:48 ` Andreas Herrmann [this message]
2013-09-26 22:36 ` [PATCH 7/9] iommu/arm-smmu: Add function that conditionally isolates all masters of all SMMUs Andreas Herrmann
[not found] ` <1380234982-1677-8-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 13:00 ` Will Deacon
[not found] ` <20130927130001.GF9520-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-10-07 15:42 ` Andreas Herrmann
2013-10-08 10:43 ` Will Deacon
2013-09-26 22:36 ` [PATCH 8/9] iommu/arm-smmu: Introduce a default fault handler Andreas Herrmann
[not found] ` <1380234982-1677-9-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
2013-09-27 10:09 ` Will Deacon
[not found] ` <20130927100902.GD9057-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org>
2013-09-27 10:45 ` Andreas Herrmann
2013-09-27 21:22 ` [PATCH] iommu/arm-smmu: Print context fault information Andreas Herrmann
2013-09-26 22:36 ` [PATCH 9/9] ARM: dts: Add nodes for SMMUs on Calxeda ECX-2000 Andreas Herrmann
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