linux-kernel - Re: [RFC PATCH v2 00/15] ACPI IORT ARM SMMU v3 support

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Date:	Tue, 21 Jun 2016 18:37:17 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	iommu@...ts.linux-foundation.org
Cc:	Will Deacon <will.deacon@....com>,
	Marc Zyngier <marc.zyngier@....com>,
	Robin Murphy <robin.murphy@....com>,
	Joerg Roedel <joro@...tes.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Tomasz Nowicki <tn@...ihalf.com>, Jon Masters <jcm@...hat.com>,
	Sinan Kaya <okaya@...eaurora.org>, linux-acpi@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linuxarm@...wei.com
Subject: Re: [RFC PATCH v2 00/15] ACPI IORT ARM SMMU v3 support

Hi Lorenzo,

On 2016/6/7 21:30, Lorenzo Pieralisi wrote:
> This RFC patch series is v2 of a previous posting:
>
> https://lkml.org/lkml/2016/4/14/702
>
> v1 -> v2:
> 	- Rebased on top of dependencies series [1][2][3](v4.7-rc1)
> 	- Removed IOMMU fwnode generalization
> 	- Implemented ARM SMMU v3 ACPI probing instead of ARM SMMU v2
> 	  owing to patch series dependencies [1]
> 	- Moved platform device creation logic to IORT code to
> 	  generalize its usage for ARM SMMU v1-v2-v3 components
> 	- Removed reliance on ACPI early device probing
> 	- Created IORT specific iommu_xlate() translation hook leaving
> 	  OF code unchanged according to v1 reviews
>
> The ACPI IORT table provides information that allows instantiating
> ARM SMMU devices and carrying out id mappings between components on
> ARM based systems (devices, IOMMUs, interrupt controllers).
>
> http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf
>
> Building on basic IORT support, available through [2]:
>
> this patchset enables ARM SMMU v3 support on ACPI systems.

I'm trying to test your patches on D03 (SMMUv3 based) but ...

[...]
> [1] R.Murphy "Generic DT bindings for PCI and ARM SMMU v3"
>     http://marc.info/?l=linux-arm-kernel&m=146497432413816&w=2

...This patch set is still in discussion and seems not work
for non-PCI devices.

>
> [2] T.Nowicki "Introduce ACPI world to ITS irqchip" v5
>     http://marc.info/?l=linux-acpi&m=146469369703684&w=2

Tomasz sent out the v7 and included patches in your series.

I think a updated version before the test makes sense, what
do you think? Let me know your thoughts.

Thanks
Hanjun