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Date:	Sun,  2 Nov 2014 14:04:15 +0800
From:	Jiang Liu <>
To:	Benjamin Herrenschmidt <>,
	Thomas Gleixner <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>,
	"Rafael J. Wysocki" <>,
	Bjorn Helgaas <>,
	Randy Dunlap <>,
	Yinghai Lu <>, Borislav Petkov <>
Cc:	Jiang Liu <>,
	Konrad Rzeszutek Wilk <>,
	Andrew Morton <>,
	Tony Luck <>,
	Joerg Roedel <>,
	Greg Kroah-Hartman <>,,,,
Subject: [Patch v8 00/18] Enable support of IOAPIC hotplug on x86 platforms

This patch set enhances IOAPIC core and ACPI drivers to support IOAPIC
hotplug on x86 platforms. It's based on v3.18-rc2 at

You may pull it from ioapic/hotplug_v8

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 1-3 are bugfixes against v3.17 and should target v3.18. Patch 1
has been merged into tip/x86/urgent.
Patch 4-7 are bugfixes and enhancements to ACPI subsystem
Patch 8 killes PCI IOAPIC driver
Patch 9-17 enhances IOAPIC core to support IOAPIC hotplug
Patch 18 reimplements ACPI IOAPIC driver and enables IOAPIC hotplug

1) Use mutex instead of rwsem to protect IOAPIC from hotplug
1) Rebase to v3.18-rc2
2) Three bugfixes for v3.18
1) Rebase to the latest v3.17-16
2) Minor fixes for comments
1) Fix a building error
2) Don't rename processor_core.c as apic_id.c
3) Improve comments
4) Reorder patches to get rid of some temporary code
1) Fix a bug in manage IOAPIC reference count
2) Rebase to v3.17-rc2
3) Refine commit messages
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 (15):
  x86: ACPI: Do not translate GSI number if IOAPIC is disabled
  x86, intel-mid: Create IRQs for APB timers and RTC timers
  x86, irq, ACPI: Return IRQ instead of GSI in mp_register_gsi()
  x86, PCI, ACPI: Kill private function resource_to_addr() in
  ACPI: Correct return value of acpi_dev_resource_address_space()
  ACPI: Fix minor syntax issues in processor_core.c
  PCI: Remove PCI ioapic driver
  x86, irq: Remove __init marker for functions will be used by IOAPIC
  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
  x86, irq, ACPI: Implement interface to support ACPI based IOAPIC
  x86, irq, ACPI: Implement interfaces to support ACPI based IOAPIC
  x86, irq: Introduce helper to check whether an IOAPIC has been
  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       |  102 ++++++++++++++--
 arch/x86/kernel/apb_timer.c       |    2 -
 arch/x86/kernel/apic/io_apic.c    |  234 +++++++++++++++++++++++++++++-------
 arch/x86/pci/acpi.c               |  144 +++++++++--------------
 arch/x86/pci/intel_mid_pci.c      |   10 +-
 arch/x86/pci/irq.c                |    7 +-
 arch/x86/platform/intel-mid/sfi.c |    2 +
 drivers/acpi/Kconfig              |    6 +
 drivers/acpi/Makefile             |    1 +
 drivers/acpi/internal.h           |    7 ++
 drivers/acpi/ioapic.c             |  235 +++++++++++++++++++++++++++++++++++++
 drivers/acpi/pci_irq.c            |   11 +-
 drivers/acpi/pci_root.c           |    3 +
 drivers/acpi/processor_core.c     |  131 ++++++++++++++++++---
 drivers/acpi/resource.c           |    2 +-
 drivers/pci/Kconfig               |    7 --
 drivers/pci/Makefile              |    2 -
 drivers/pci/ioapic.c              |  121 -------------------
 include/linux/acpi.h              |    5 +
 include/linux/pci.h               |    1 +
 21 files changed, 739 insertions(+), 300 deletions(-)
 create mode 100644 drivers/acpi/ioapic.c
 delete mode 100644 drivers/pci/ioapic.c


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