[Xen-devel] [PATCH V1] iommu/arm: Add Renesas IPMMU-VMSA support

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

The purpose of this patch is to add IPMMU-VMSA support to Xen on ARM.

The IPMMU-VMSA is VMSA-compatible I/O Memory Management Unit (IOMMU)
which provides address translation and access protection functionalities
to processing units and interconnect networks.

Please note, this driver is supposed to work only with newest
Gen3 SoCs revisions which IPMMU hardware supports stage 2 translation
table format and is able to use CPU's P2M table as is if one is
3-level page table (up to 40 bit IPA).

This driver is based on Linux's IPMMU-VMSA driver from Renesas BSP:
https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/tree/drivers/iommu/ipmmu-vmsa.c?h=v4.14.75-ltsi/rcar-3.9.2
and Xen's SMMU driver:
xen/drivers/passthrough/arm/smmu.c

Although Xen driver has a lot in common with Linux driver, it is not
a "direct ported" copy and should be treated as such.

Driver was tested on Gen3 H3 ES3.0 based boards using current staging
(7d1460c xen/arm: optee: fix compilation with GCC 4.8)
in a system with several DMA masters being assigned to different guest domains.

You can find it here:
repo: https://github.com/otyshchenko1/xen.git branch: ipmmu_upstream1

Oleksandr Tyshchenko (1):
  iommu/arm: Add Renesas IPMMU-VMSA support

 xen/arch/arm/platforms/Kconfig           |    1 +
 xen/drivers/passthrough/Kconfig          |   13 +
 xen/drivers/passthrough/arm/Makefile     |    1 +
 xen/drivers/passthrough/arm/ipmmu-vmsa.c | 1487 ++++++++++++++++++++++++++++++
 4 files changed, 1502 insertions(+)
 create mode 100644 xen/drivers/passthrough/arm/ipmmu-vmsa.c

-- 
2.7.4


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