[dpdk-dev] [PATCH v3 0/6] ARMv8 additions to ARMv7 support

[David Hunt]

This is th v3 patchset for ARMv8 that now sits on top of the v5 patch
of the ARMv7 code by RehiveTech. It adds code into the same arm include
directory, reducing code duplication.

Tested on an XGene 64-bit arm server board, with PCI slots. Passes traffic
between two physical ports on an Intel 82599 dual-port 10Gig NIC. Should
work with many other NICS, but these are as yet untested.

Compiles igb_uio, kni and all the physical device PMDs.

An entry has been added to the Release notes.

We hope that this will encourage the ARM community to contribute PMDs
for their SoCs to DPDK.

For now, we've added some Intel engineers to the MAINTAINERS file. We would
like to encourage the ARM community to take over maintenance of this area
in future, and to further improve it.

Notes on arm64 kernel configuration:

  Using Ubuntu 14.04 LTS with a 4.3.0-rc6 kernel (with modified PCI drivers),
  and uio_pci_generic.
  ARM64 kernels do not seem to have functional resource mapping of PCI memory
  (PCI_MMAP), so the pci driver needs to be patched to enable this. The
  symptom of this is when /sys/bus/pci/devices/0000:0X:00.Y directory is
  missing the resource0...N files for mmapping the device memory. Earlier
  kernels (3.13.x) had these files present, but mmap'ping resulted in a
  "Bus Error" when the NIC memory was accessed.
  However, during limited testing with a modified 4.3.0-rc6 kernel, we were
  able to mmap the NIC memory, and pass traffic between the two ports on a
  82599 NIC connected via fibre cable.
  We have no plans to upstream a kernel patch for this and hope that
  someone more familiar with the arm architecture can create a proper patch
  and enable this functionality.

Reviewed-by: Jan Viktorin <viktorin at rehivetech.com>

David Hunt (6):
  eal/arm: add 64-bit armv8 version of rte_memcpy.h
  eal/arm: add 64-bit armv8 version of rte_prefetch.h
  eal/arm: add 64-bit armv8 version of rte_cycles.h
  eal/arm: fix 64-bit armv8 compilation of rte_cpuflags.h
  mk: add support for armv8 on top of armv7
  test: add checks for cpu flags on armv8

 MAINTAINERS                                        |   3 +-
 app/test/test_cpuflags.c                           |  13 +-
 config/defconfig_arm64-armv8a-linuxapp-gcc         |  56 ++++
 doc/guides/rel_notes/release_2_2.rst               |   7 +-
 .../common/include/arch/arm/rte_cpuflags.h         |   6 +-
 .../common/include/arch/arm/rte_cycles.h           |   4 +
 .../common/include/arch/arm/rte_cycles_64.h        |  77 ++++++
 .../common/include/arch/arm/rte_memcpy.h           |   4 +
 .../common/include/arch/arm/rte_memcpy_64.h        | 308 +++++++++++++++++++++
 .../common/include/arch/arm/rte_prefetch.h         |   4 +
 .../common/include/arch/arm/rte_prefetch_64.h      |  61 ++++
 mk/arch/arm64/rte.vars.mk                          |  58 ++++
 mk/machine/armv8a/rte.vars.mk                      |  57 ++++
 13 files changed, 651 insertions(+), 7 deletions(-)
 create mode 100644 config/defconfig_arm64-armv8a-linuxapp-gcc
 create mode 100644 lib/librte_eal/common/include/arch/arm/rte_cycles_64.h
 create mode 100644 lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
 create mode 100644 lib/librte_eal/common/include/arch/arm/rte_prefetch_64.h
 create mode 100644 mk/arch/arm64/rte.vars.mk
 create mode 100644 mk/machine/armv8a/rte.vars.mk

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