[PATCH v9 00/11] PCI, x86: update MMCFG information when hot-plugging PCI host bridges

[Jiang Liu <jiang.liu@huawei.com>]

This patchset enhance pci_root driver to update MMCFG information when
hot-plugging PCI root bridges. It applies to 
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/next

-v2: split into smaller patches and skip updating MMCFG information when
     MMCFG is disabled
-v3: add mmconf_added to simply free path, also make pci_mmconfig_insert()
     to process extra exist case --- By Yinghai
-v4: tune arch_acpi_pci_root_add() to handle a corner case raised by Kenji
-v5: address review comments from Bjorn and Taku, also better handle corner
     cases in arch_acpi_pci_root_add()
-v6: get rid of arch_acpi_pci_root_xxx() by using existing hooks
     add MCFG information for host bridges on demand
     more corner cases clear up
     correctly handle condition compilation
     fix section mismatch issues
     fix a issue reported by Taku about a BIOS bug
-v7: unify log messages
     remove redundant host bridge resource related log messages
     fix a issue reported by Taku which breaks pnp resource allocation
-v8: 1) add acpi_pci_cache_mcfg() in patch "provide MCFG address for PCI host
     bridges" for better readability and fix a condition compilation issue
     2) change patch "add MMCFG information on demand" to RFC and fix
     compilation issues reported by Fengguang
     3) Add new patch "refine __pci_mmcfg_init() for better code readability"
      and "mark acpi_sfi_table_parse() as __init", there should no
      functionality changes.
-v9: changes from v7 (redo v8)
     Redo v8 to remove MCFG caching logic according to Yinghai's suggestion.
     1) remove patch "add MMCFG information on demand" and MCFG caching logic
     2) Add new patch "refine __pci_mmcfg_init() for better code readability"
      and "mark acpi_sfi_table_parse() as __init", there should no
      functionality changes.

Jiang Liu (11):
  x86/PCI: split out pci_mmcfg_check_reserved() for code reuse
  x86/PCI: split out pci_mmconfig_alloc() for code reuse
  x86/PCI: use RCU list to protect mmconfig list
  x86/PCI: introduce pci_mmcfg_arch_map()/pci_mmcfg_arch_unmap()
  x86/PCI: add pci_mmconfig_insert()/delete() for PCI root bridge
    hotplug
  PCI/ACPI: provide MCFG address for PCI host bridges
  x86/PCI: update MMCFG information when hot-plugging PCI host bridges
  x86/PCI: simplify pci_mmcfg_late_insert_resources()
  x86/PCI: get rid of redundant log messages
  x86, PCI: refine __pci_mmcfg_init() for better code readability
  ACPI: mark acpi_sfi_table_parse() as __init

 arch/x86/include/asm/pci_x86.h |    7 +
 arch/x86/pci/acpi.c            |   78 ++++++++-
 arch/x86/pci/mmconfig-shared.c |  361 +++++++++++++++++++++++++++-------------
 arch/x86/pci/mmconfig_32.c     |   30 +++-
 arch/x86/pci/mmconfig_64.c     |   37 ++++-
 drivers/acpi/pci_root.c        |    2 +
 drivers/pci/pci-acpi.c         |   14 ++
 include/acpi/acnames.h         |    1 +
 include/acpi/acpi_bus.h        |    1 +
 include/linux/pci-acpi.h       |    1 +
 include/linux/sfi_acpi.h       |    4 +-
 11 files changed, 403 insertions(+), 133 deletions(-)