Description of problem:
Intel 9-series PCH chipsets lack native ACS support and we lack quirks for them. According to the datasheet, the device IDs for the PCH root ports on these chipsets are:
0x8c90, 0x8c92, 0x8c94, 0x8c96, 0x8c98, 0x8c9a, 0x8c9c, 0x8c9e
The 9-series products include popular chipsets such as Z97 and H97. If Intel can confirm that these products provide isolation using the same programming model as used in bug 1037684, we can add quirks to expose the isolation of these root ports.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Don, can we support this?
Don has confirmed ACS-equivalent isolation for these root ports using the same setup as the existing Intel PCH ACS quirk. Patch posted upstream:
Re-assigning to myself for backport and post once accepted.
Author: Alex Williamson <email@example.com>
Date: Fri May 1 13:20:13 2015 -0600
PCI: Add ACS quirks for Intel 9-series PCH root ports
Intel confirms that 9-series chipset root ports provide ACS-equivalent
isolation when configured via the existing Intel PCH ACS quirk setup.
Signed-off-by: Alex Williamson <firstname.lastname@example.org>
Signed-off-by: Bjorn Helgaas <email@example.com>
Acked-by: Don Dugger <firstname.lastname@example.org>
Patch(es) available on kernel-3.10.0-267.el7
Confirmed ACS quirks added per description, also have run numerous kernel and userspace tests on these platforms with any issues documented as separate bugs.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.