linux/Documentation/ABI/testing/sysfs-driver-pciback
Konrad Rzeszutek Wilk 8b63c998b3 xen-pciback: Document the 'quirks' sysfs file
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2014-08-01 16:02:34 +01:00

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What: /sys/bus/pci/drivers/pciback/quirks
Date: Oct 2011
KernelVersion: 3.1
Contact: xen-devel@lists.xenproject.org
Description:
If the permissive attribute is set, then writing a string in
the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest
to write and read from the PCI device. That is Domain:Bus:
Device.Function-Register:Size:Mask (Domain is optional).
For example:
#echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
will allow the guest to read and write to the configuration
register 0x0E.