[RFC PATCH v2 00/15] ACPI IORT ARM SMMU v3 support

Hi Hanjun,

On Tue, Jun 21, 2016 at 06:37:17PM +0800, Hanjun Guo wrote:

Hi Lorenzo,

On 2016/6/7 21:30, Lorenzo Pieralisi wrote:

quoted

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 ...

What do you mean by "I am trying.." :), have you actually tested
this series ?

[...]

quoted

[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.

Can you be more specific please ? Yes, both series are work
in progress.

quoted

[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.

I am working with Robin so that the xlate() mechanism works
properly and seamlessly for both DT and ACPI, given the
dependencies I think it makes more sense to wait for Tomasz
and Robin patches to get merged or at least stabilize before
doing anything else, I am curently working on a v3.

Thanks,
Lorenzo