On Tue, Jun 07, 2016 at 02:24:17PM +0000, Koehrer Mathias (ETAS/ESW5) wrote: > 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 multiple 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. > This patch extends the kernel option "pci=resource_alignment" to allow to > specify the relevant boards 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@xxxxxxxx> > > --- > Documentation/kernel-parameters.txt | 2 + > drivers/pci/pci.c | 66 +++++++++++++++++++++++++----------- > 2 files changed, 49 insertions(+), 19 deletions(-) > > Index: linux-4.7-rc1/Documentation/kernel-parameters.txt > =================================================================== > --- linux-4.7-rc1.orig/Documentation/kernel-parameters.txt > +++ linux-4.7-rc1/Documentation/kernel-parameters.txt > @@ -2998,6 +2998,8 @@ bytes respectively. Such letter suffixes > resource_alignment= > Format: > [<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...] > + [<order of align>@]pci:<vendor>:<device>\ > + [:<subvendor>:<subdevice>][; ...] Can you include a little example here so we know whether to use "pci:8086:1234" or "pci:0x8086:0x1234"? Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
