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Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-pci')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index 6615fda0abfb..b3bc50f650ee 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -65,6 +65,16 @@ Description: force a rescan of all PCI buses in the system, and re-discover previously removed devices. +What: /sys/bus/pci/devices/.../msi_bus +Date: September 2014 +Contact: Linux PCI developers <linux-pci@vger.kernel.org> +Description: + Writing a zero value to this attribute disallows MSI and + MSI-X for any future drivers of the device. If the device + is a bridge, MSI and MSI-X will be disallowed for future + drivers of all child devices under the bridge. Drivers + must be reloaded for the new setting to take effect. + What: /sys/bus/pci/devices/.../msi_irqs/ Date: September, 2011 Contact: Neil Horman <nhorman@tuxdriver.com> @@ -271,3 +281,16 @@ Description: opt-out of driver binding using a driver_override name such as "none". Only a single driver may be specified in the override, there is no support for parsing delimiters. + +What: /sys/bus/pci/devices/.../numa_node +Date: Oct 2014 +Contact: Prarit Bhargava <prarit@redhat.com> +Description: + This file contains the NUMA node to which the PCI device is + attached, or -1 if the node is unknown. The initial value + comes from an ACPI _PXM method or a similar firmware + source. If that is missing or incorrect, this file can be + written to override the node. In that case, please report + a firmware bug to the system vendor. Writing to this file + taints the kernel with TAINT_FIRMWARE_WORKAROUND, which + reduces the supportability of your system. |