linux-kernel - [PATCH v2 0/3] Quirk Intel PCH root ports for ACS-like features

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Date:	Mon, 03 Feb 2014 14:27:27 -0700
From:	Alex Williamson <alex.williamson@...hat.com>
To:	bhelgaas@...gle.com, linux-pci@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] Quirk Intel PCH root ports for ACS-like features

v2:
 - Remove bus #0 bug in filtering matching
 - Add 2/3 introducing PCI_DEV_FLAGS_ACS_ENABLED_QUIRK, this gives
   is better tracking and addresses the theoretical hotplug issue
 - Update 3/3 for PCI_DEV_FLAGS_ACS_ENABLED_QUIRK
 - Add dev_info to print regardless of whether we changes bits
 - Add Intel cc

As described in 3/3 many Intel root ports lack PCIe ACS capabilities
which results in excessively large IOMMU groups.  Many of these root
ports do provide isolation capabilities, we just need to use device
specific mechanisms to enable and verify.  Long term, I hope we can
round out this list (particularly to include X79 root ports) and
more importantly, encourage proper PCIe ACS support in future
products.  I'm really hoping we can get this in during the 3.14 cycle.
Thanks,

Alex
---

Alex Williamson (3):
      pci: Add device specific PCI ACS enable
      pci: Add pci_dev_flag for ACS enable quirks
      pci/quirks: Enable quirks for PCIe ACS on Intel PCH root ports


 drivers/pci/pci.c    |   26 +++++--
 drivers/pci/quirks.c |  185 ++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/pci.h  |    4 +
 3 files changed, 209 insertions(+), 6 deletions(-)
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