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RFC ACPI PCI support for arm64

Lorenzo Pieralisi linux-arm-kernel linux-pci 1 version New

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  1. v1 RFC Latest0 of 3 patches 0 repliesNew

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

[Resend, LAKML copied-in]

Quoted 55 lines · Lorenzo Pieralisi

[CC'ing Tomasz]

Quoted 3 lines · Jayachandran C

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 3 lines

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 1 line

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 25 lines

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
Signature · 6 lines
1.9.1

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