[RFC PATCH 0/3] ACPI PCI support for arm64

[Resend, LAKML copied-in]

On Thu, Dec 03, 2015 at 10:56:28AM +0000, Lorenzo Pieralisi wrote:

[CC'ing Tomasz]

On Thu, Dec 03, 2015 at 03:54:43AM +0530, Jayachandran C wrote:

quoted

This is a very simple and generic implementation of a PCI host controller
based on ACPI. This approach does not pull in the MMCONFIG and ECAM code
from x86.

Why ? Tomasz's patchset does not move MMCONFIG and ECAM code to the generic
PCI layer for fun, it is generic code and should be shared by all
architectures and most importantly we should not add more churn on
top of it which would complicate consolidation even further.

quoted

It is important for us to have a working ACPI based PCI host controller
implementation for arm64, so I thought I would post this as a simple
and less disruptive alternative.

It is important for everyone but that's not a reason granting shortcuts.

quoted

This is tested with arm64 QEMU and OVMF. Comments are very welcome.

Tomasz's patch went through several review cycles, please help review
it and test it, that's my comment.

A new version should be posted soon, previous version here:

https://lkml.org/lkml/2015/10/27/504

Thanks,
Lorenzo

quoted

Thanks,
JC.

Jayachandran C (3):
  arm64: pci: Add ACPI support
  pci: Handle NULL parent in pci_bus_assign_domain_nr
  pci/host : Add a generic ACPI based host controller

 arch/arm64/kernel/pci.c          |  47 ++++++++-
 drivers/pci/host/Kconfig         |   7 ++
 drivers/pci/host/Makefile        |   1 +
 drivers/pci/host/pci-host-acpi.c | 211 +++++++++++++++++++++++++++++++++++++++
 drivers/pci/pci.c                |   7 +-
 5 files changed, 270 insertions(+), 3 deletions(-)
 create mode 100644 drivers/pci/host/pci-host-acpi.c

-- 
1.9.1

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