From 8b63c998b31c69fff2c8c8c7e543e3142d9eea71 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Mon, 14 Jul 2014 12:18:51 -0400 Subject: [PATCH] xen-pciback: Document the 'quirks' sysfs file Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: David Vrabel --- Documentation/ABI/testing/sysfs-driver-pciback | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-driver-pciback diff --git a/Documentation/ABI/testing/sysfs-driver-pciback b/Documentation/ABI/testing/sysfs-driver-pciback new file mode 100644 index 000000000000..6a733bfa37e6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-pciback @@ -0,0 +1,13 @@ +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. -- 2.20.1