[Patch v4 00/16] Enable support of IOAPIC hotplug on x86 platforms

[Jiang Liu]

This patch set enhances IOAPIC core and ACPI drivers to support IOAPIC
hotplug on x86 platforms. It's based on latest mainstream kernel at
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

You may pull it from 
https://github.com/jiangliu/linux.git ioapic/hotplug_v4

We have pick up several patches from Yinghai's original IOAPIC hotplug
patch set and reimplemented IOAPIC driver as an ACPI driver instead of
a PCI driver.

It has been tested on a 4-socket Intel SDV with socket hot-addition
capability. Any suggestions are welcomed!

Patch 1-5 are bugfixes and enhancements to ACPI subsystem
Patch 6-14 enhances IOAPIC core to support IOAPIC hotplug
Patch 15 killes PCI IOAPIC driver
Patch 16 reimplements ACPI IOAPIC driver and enables IOAPIC hotplug

V3->V4:
1) Fix a bug in manage IOAPIC reference count
2) Rebase to v3.17-rc2
3) Refine commit messages
V2->V3:
1) Refine ACPI resource walk functions for PCI root bus and IOAPIC
2) Improve commit messages
3) Reorder patch order for better maintenence

Jiang Liu (13):
  x86, PCI, ACPI: Kill private function resource_to_addr() in
    arch/x86/pci/acpi.c
  ACPI: Correct return value of acpi_dev_resource_address_space()
  ACPI: Fix minor syntax issues in processor_core.c
  ACPI: Rename processor_core.c as apic_id.c
  x86, irq: Remove __init marker for functions will be used by IOAPIC
    hotplug
  x86, irq: Keep balance of IOAPIC pin reference count
  x86, irq: Refine mp_register_ioapic() to prepare for IOAPIC hotplug
  x86, irq, ACPI: Introduce a rwsem to protect IOAPIC operations from
    hotplug
  x86, irq, ACPI: Implement interface to support ACPI based IOAPIC
    hot-addition
  x86, irq, ACPI: Implement interfaces to support ACPI based IOAPIC
    hot-removal
  x86, irq: Introduce helper to check whether an IOAPIC has been
    registered
  PCI: Remove PCI ioapic driver
  x86, irq, ACPI: Implement ACPI driver to support IOAPIC hotplug

Yinghai Lu (3):
  ACPI: Add interfaces to parse IOAPIC ID for IOAPIC hotplug
  x86, irq: Split out alloc_ioapic_save_registers()
  x86, irq: Prefer assigned ID in APIC ID register for x86_64

 arch/x86/include/asm/io_apic.h |    6 +-
 arch/x86/kernel/acpi/boot.c    |   68 +++++++++-
 arch/x86/kernel/apic/io_apic.c |  235 +++++++++++++++++++++++++-------
 arch/x86/pci/acpi.c            |  142 +++++++------------
 arch/x86/pci/intel_mid_pci.c   |    9 +-
 arch/x86/pci/irq.c             |    7 +-
 drivers/acpi/Kconfig           |    6 +
 drivers/acpi/Makefile          |    3 +-
 drivers/acpi/apic_id.c         |  294 ++++++++++++++++++++++++++++++++++++++++
 drivers/acpi/internal.h        |    7 +
 drivers/acpi/ioapic.c          |  236 ++++++++++++++++++++++++++++++++
 drivers/acpi/pci_irq.c         |   11 +-
 drivers/acpi/pci_root.c        |    3 +
 drivers/acpi/processor_core.c  |  206 ----------------------------
 drivers/acpi/resource.c        |    2 +-
 drivers/pci/Kconfig            |    7 -
 drivers/pci/Makefile           |    2 -
 drivers/pci/ioapic.c           |  121 -----------------
 include/acpi/processor.h       |    3 -
 include/linux/acpi.h           |    8 ++
 include/linux/pci.h            |    1 +
 21 files changed, 885 insertions(+), 492 deletions(-)
 create mode 100644 drivers/acpi/apic_id.c
 create mode 100644 drivers/acpi/ioapic.c
 delete mode 100644 drivers/acpi/processor_core.c
 delete mode 100644 drivers/pci/ioapic.c

-- 
1.7.10.4

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