linux-kernel - [PATCH 4.9 046/101] PCI: Add ACS quirk for Intel 7th & 8th Gen mobile

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Message-Id: <20180701160758.995039117@linuxfoundation.org>
Date:   Sun,  1 Jul 2018 18:21:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Alex Williamson <alex.williamson@...hat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 4.9 046/101] PCI: Add ACS quirk for Intel 7th & 8th Gen mobile

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Williamson <alex.williamson@...hat.com>

commit e8440f4bfedc623bee40c84797ac78d9303d0db6 upstream.

The specification update indicates these have the same errata for
implementing non-standard ACS capabilities.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
CC: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pci/quirks.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4225,11 +4225,24 @@ static int pci_quirk_qcom_rp_acs(struct
  * 0xa290-0xa29f PCI Express Root port #{0-16}
  * 0xa2e7-0xa2ee PCI Express Root port #{17-24}
  *
+ * Mobile chipsets are also affected, 7th & 8th Generation
+ * Specification update confirms ACS errata 22, status no fix: (7th Generation
+ * Intel Processor Family I/O for U/Y Platforms and 8th Generation Intel
+ * Processor Family I/O for U Quad Core Platforms Specification Update,
+ * August 2017, Revision 002, Document#: 334660-002)[6]
+ * Device IDs from I/O datasheet: (7th Generation Intel Processor Family I/O
+ * for U/Y Platforms and 8th Generation Intel ® Processor Family I/O for U
+ * Quad Core Platforms, Vol 1 of 2, August 2017, Document#: 334658-003)[7]
+ *
+ * 0x9d10-0x9d1b PCI Express Root port #{1-12}
+ *
  * [1] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-2.html
  * [2] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-1.html
  * [3] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-spec-update.html
  * [4] http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-spec-update.html
  * [5] http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-datasheet-vol-1.html
+ * [6] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-spec-update.html
+ * [7] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-datasheet-vol-1.html
  */
 static bool pci_quirk_intel_spt_pch_acs_match(struct pci_dev *dev)
 {
@@ -4239,6 +4252,7 @@ static bool pci_quirk_intel_spt_pch_acs_
 	switch (dev->device) {
 	case 0xa110 ... 0xa11f: case 0xa167 ... 0xa16a: /* Sunrise Point */
 	case 0xa290 ... 0xa29f: case 0xa2e7 ... 0xa2ee: /* Union Point */
+	case 0x9d10 ... 0x9d1b: /* 7th & 8th Gen Mobile */
 		return true;
 	}