| 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. |