summaryrefslogtreecommitdiff
path: root/Documentation/kernel-parameters.txt
diff options
context:
space:
mode:
authorKoehrer Mathias (ETAS/ESW5) <mathias.koehrer@etas.com>2016-06-07 17:24:17 +0300
committerBjorn Helgaas <bhelgaas@google.com>2016-06-22 01:00:34 +0300
commit644a544fd9bcd65f524768b85ab22f62ed08e107 (patch)
tree26ed01e3044c8186b603fd0aae0fbf4d5db03c28 /Documentation/kernel-parameters.txt
parent3b146b24a40096d1a42f288e237e24352c93269e (diff)
downloadlinux-644a544fd9bcd65f524768b85ab22f62ed08e107.tar.xz
PCI: Extending pci=resource_alignment to specify device/vendor IDs
Some uio-based PCI drivers, e.g., uio_cif do not work if the assigned PCI memory resources are not page aligned. By using the kernel option "pci=resource_alignment" it is possible to force single PCI boards to use page alignment for their memory resources. However, this is fairly cumbersome if several of these boards are in use as the specification of the cards has to be done via PCI bus/slot/function number which might change, e.g., by adding another board. Extend the kernel option "pci=resource_alignment" to allow specification of relevant devices via PCI device/vendor (and subdevice/subvendor) IDs. The specification of the devices via device/vendor is indicated by a leading string "pci:" as argument to "pci=resource_alignment". The format of the specification is pci:<vendor>:<device>[:<subvendor>:<subdevice>] Signed-off-by: Mathias Koehrer <mathias.koehrer@etas.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 82b42c958d1c..0618cdd5707e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2998,6 +2998,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
resource_alignment=
Format:
[<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...]
+ [<order of align>@]pci:<vendor>:<device>\
+ [:<subvendor>:<subdevice>][; ...]
Specifies alignment and device to reassign
aligned memory resources.
If <order of align> is not specified,