linux-kernel - [PATCH v8 0/4] Add parameter for disabling ACS redirection for P2P

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Date:   Mon, 30 Jul 2018 10:18:36 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-doc@...r.kernel.org
Cc:     Stephen Bates <sbates@...thlin.com>,
        Christoph Hellwig <hch@....de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Christian König <christian.koenig@....com>,
        Matthew Wilcox <willy@...radead.org>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH v8 0/4] Add parameter for disabling ACS redirection for P2P

Changes since v6:
* Fixed order of operations for device specific disable function as
  noticed by Alex
* Rebased onto v4.18-rc5 (no conflicts)

Changes since v5:
* Add a quirk to handle the Intel SPT PCH case (as pointed out by Alex)
* Warn in the case that we try to disable ACS redirect on a device
  that doesn't have the ACS capability (also suggested by Alex)
* Collect reviewed-by tag from Alex
* Rebased onto v4.18-rc4 (no conflicts)

Changes since v4:
* Fixed a couple documentation mistakes spotted by Randy

Changes since v3:
* Removed some of the cruft that was copied from the resource_alignment
  paramater (per Alex)
* A number of docuemntation fixes as noticed by Alex and Willy

Changes since v2:
* Rebased onto v4.18-rc1 (no conflicts)
* Minor tweaks to the documentation per Andy
* Removed the "path:" prefix and use the path parsing code
  for simple devices (as it works the same). Per a suggestion from Alex

Changes since v1:
* Reworked pci_dev_str_match_path using strrchr as suggested by Alex
* Collected Christian's Acks


Logan Gunthorpe (4):
  PCI: Make specifying PCI devices in kernel parameters reusable
  PCI: Allow specifying devices using a base bus and path of devfns
  PCI: Introduce disable_acs_redir quirk
  PCI: Introduce the disable_acs_redir parameter

 Documentation/admin-guide/kernel-parameters.txt |  41 +++-
 drivers/pci/pci.c                               | 310 +++++++++++++++++++-----
 drivers/pci/quirks.c                            |  78 +++++-
 include/linux/pci.h                             |   5 +
 4 files changed, 361 insertions(+), 73 deletions(-)

--
2.11.0