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

Jiang Liu
2014-08-28T02:22:25Z

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

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