GNU Linux-libre 4.4.294-gnu1
[releases.git] / Documentation / ABI / testing / sysfs-driver-pciback
1 What:           /sys/bus/pci/drivers/pciback/quirks
2 Date:           Oct 2011
3 KernelVersion:  3.1
4 Contact:        xen-devel@lists.xenproject.org
5 Description:
6                 If the permissive attribute is set, then writing a string in
7                 the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest
8                 to write and read from the PCI device. That is Domain:Bus:
9                 Device.Function-Register:Size:Mask (Domain is optional).
10                 For example:
11                 #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
12                 will allow the guest to read and write to the configuration
13                 register 0x0E.