[Xen-devel] [PATCH 0/3] Add pci_enable_msi_partial() to conserve MSI-related resources

[Alexander Gordeev <agordeev@xxxxxxxxxx>]

Add new pci_enable_msi_partial() interface and use it to
conserve on othewise wasted interrupt resources.

AHCI driver is the first user which would conserve on
10 out of 16 unused MSI vectors on some Intel chipsets.

Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: linux-s390@xxxxxxxxxxxxxxx
Cc: x86@xxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-ide@xxxxxxxxxxxxxxx
Cc: linux-pci@xxxxxxxxxxxxxxx

Alexander Gordeev (3):
  PCI/MSI: Add pci_enable_msi_partial()
  PCI/MSI/x86: Support pci_enable_msi_partial()
  AHCI: Use pci_enable_msi_partial() to conserve on 10/16 MSIs

 Documentation/PCI/MSI-HOWTO.txt |   36 ++++++++++++++--
 arch/mips/pci/msi-octeon.c      |    2 +-
 arch/powerpc/kernel/msi.c       |    4 +-
 arch/s390/pci/pci.c             |    2 +-
 arch/x86/include/asm/pci.h      |    3 +-
 arch/x86/include/asm/x86_init.h |    3 +-
 arch/x86/kernel/apic/io_apic.c  |    2 +-
 arch/x86/kernel/x86_init.c      |    4 +-
 arch/x86/pci/xen.c              |    9 +++-
 drivers/ata/ahci.c              |    4 +-
 drivers/iommu/irq_remapping.c   |   10 ++--
 drivers/pci/msi.c               |   83 ++++++++++++++++++++++++++++++++++-----
 include/linux/msi.h             |    5 +-
 include/linux/pci.h             |    3 +
 14 files changed, 134 insertions(+), 36 deletions(-)

-- 
1.7.7.6


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