[RFC PATCH v1 0/7] IPMMU-VMSA support on ARM

[Oleksandr Tyshchenko <olekstysh@gmail.com>]

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>

Hi, all.

The purpose of this patch series is to add IPMMU-VMSA support to Xen on ARM.
It is VMSA-compatible IOMMU that integrated in the newest Renesas R-Car Gen3 SoCs (ARM).
And this IOMMU can't share the page table with the CPU since it doesn't use the same page-table format
as the CPU on ARM therefore I name it "Non-shared" IOMMU.
This all means that current patch series must be based on "Non-shared" IOMMU support [1]
for the IPMMU-VMSA to be functional inside Xen.

The IPMMU-VMSA driver as well as the ARM LPAE allocator were directly ported from BSP for Linux the vendor provides:
git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git rcar-3.5.3

Patch series was rebased on Xen 4.9.0 release and tested on Renesas R-Car Gen3 H3 ES2.0/M3 based boards
with devices assigned to different domains.

You can find patch series here:
repo: https://github.com/otyshchenko1/xen.git branch: ipmmu_v2

P.S. There is one more patch which needs to be brought back to life [2]
Any reasons why this patch hasn't been upstremed yet?

Thank you.

[1] [Xen-devel] [PATCH v2 00/13] "Non-shared" IOMMU support on ARM
https://www.mail-archive.com/xen-devel@lists.xen.org/msg115901.html

[2] [Xen-devel] [PATCH v8 02/28] xen: Add log2 functionality
https://lists.xenproject.org/archives/html/xen-devel/2016-02/msg00031.html

Oleksandr Tyshchenko (7):
  iommu/arm: ipmmu-vmsa: Add IPMMU-VMSA support
  iommu/arm: ipmmu-vmsa: Add Xen changes for main driver
  iommu/arm: ipmmu-vmsa: Add io-pgtables support
  iommu/arm: ipmmu-vmsa: Add Xen changes for io-pgtables
  iommu/arm: Build IPMMU-VMSA related stuff
  iommu/arm: ipmmu-vmsa: Deallocate page table asynchronously
  iommu/arm: ipmmu-vmsa: Enable VMSAv8-64 mode if IPMMU HW supports it

 xen/drivers/passthrough/arm/Makefile         |    3 +
 xen/drivers/passthrough/arm/io-pgtable-arm.c | 1331 +++++++++++++
 xen/drivers/passthrough/arm/io-pgtable.c     |   91 +
 xen/drivers/passthrough/arm/io-pgtable.h     |  220 +++
 xen/drivers/passthrough/arm/ipmmu-vmsa.c     | 2611 ++++++++++++++++++++++++++
 5 files changed, 4256 insertions(+)
 create mode 100644 xen/drivers/passthrough/arm/io-pgtable-arm.c
 create mode 100644 xen/drivers/passthrough/arm/io-pgtable.c
 create mode 100644 xen/drivers/passthrough/arm/io-pgtable.h
 create mode 100644 xen/drivers/passthrough/arm/ipmmu-vmsa.c

-- 
2.7.4


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