18b63c998SKonrad Rzeszutek WilkWhat: /sys/bus/pci/drivers/pciback/quirks 28b63c998SKonrad Rzeszutek WilkDate: Oct 2011 38b63c998SKonrad Rzeszutek WilkKernelVersion: 3.1 48b63c998SKonrad Rzeszutek WilkContact: xen-devel@lists.xenproject.org 58b63c998SKonrad Rzeszutek WilkDescription: 68b63c998SKonrad Rzeszutek Wilk If the permissive attribute is set, then writing a string in 78b63c998SKonrad Rzeszutek Wilk the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest 88b63c998SKonrad Rzeszutek Wilk to write and read from the PCI device. That is Domain:Bus: 98b63c998SKonrad Rzeszutek Wilk Device.Function-Register:Size:Mask (Domain is optional). 10*54a19b4dSMauro Carvalho Chehab For example:: 11*54a19b4dSMauro Carvalho Chehab 128b63c998SKonrad Rzeszutek Wilk #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks 13*54a19b4dSMauro Carvalho Chehab 148b63c998SKonrad Rzeszutek Wilk will allow the guest to read and write to the configuration 158b63c998SKonrad Rzeszutek Wilk register 0x0E. 16476878e4SMarek Marczykowski-Górecki 17476878e4SMarek Marczykowski-GóreckiWhat: /sys/bus/pci/drivers/pciback/allow_interrupt_control 18476878e4SMarek Marczykowski-GóreckiDate: Jan 2020 19476878e4SMarek Marczykowski-GóreckiKernelVersion: 5.6 20476878e4SMarek Marczykowski-GóreckiContact: xen-devel@lists.xenproject.org 21476878e4SMarek Marczykowski-GóreckiDescription: 22476878e4SMarek Marczykowski-Górecki List of devices which can have interrupt control flag (INTx, 23476878e4SMarek Marczykowski-Górecki MSI, MSI-X) set by a connected guest. It is meant to be set 24476878e4SMarek Marczykowski-Górecki only when the guest is a stubdomain hosting device model (qemu) 25476878e4SMarek Marczykowski-Górecki and the actual device is assigned to a HVM. It is not safe 26476878e4SMarek Marczykowski-Górecki (similar to permissive attribute) to set for a devices assigned 27476878e4SMarek Marczykowski-Górecki to a PV guest. The device is automatically removed from this 28476878e4SMarek Marczykowski-Górecki list when the connected pcifront terminates. 29