18c2ecf20Sopenharmony_ciWhat: /sys/bus/pci/drivers/pciback/quirks 28c2ecf20Sopenharmony_ciDate: Oct 2011 38c2ecf20Sopenharmony_ciKernelVersion: 3.1 48c2ecf20Sopenharmony_ciContact: xen-devel@lists.xenproject.org 58c2ecf20Sopenharmony_ciDescription: 68c2ecf20Sopenharmony_ci If the permissive attribute is set, then writing a string in 78c2ecf20Sopenharmony_ci the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest 88c2ecf20Sopenharmony_ci to write and read from the PCI device. That is Domain:Bus: 98c2ecf20Sopenharmony_ci Device.Function-Register:Size:Mask (Domain is optional). 108c2ecf20Sopenharmony_ci For example:: 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci will allow the guest to read and write to the configuration 158c2ecf20Sopenharmony_ci register 0x0E. 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ciWhat: /sys/bus/pci/drivers/pciback/allow_interrupt_control 188c2ecf20Sopenharmony_ciDate: Jan 2020 198c2ecf20Sopenharmony_ciKernelVersion: 5.6 208c2ecf20Sopenharmony_ciContact: xen-devel@lists.xenproject.org 218c2ecf20Sopenharmony_ciDescription: 228c2ecf20Sopenharmony_ci List of devices which can have interrupt control flag (INTx, 238c2ecf20Sopenharmony_ci MSI, MSI-X) set by a connected guest. It is meant to be set 248c2ecf20Sopenharmony_ci only when the guest is a stubdomain hosting device model (qemu) 258c2ecf20Sopenharmony_ci and the actual device is assigned to a HVM. It is not safe 268c2ecf20Sopenharmony_ci (similar to permissive attribute) to set for a devices assigned 278c2ecf20Sopenharmony_ci to a PV guest. The device is automatically removed from this 288c2ecf20Sopenharmony_ci list when the connected pcifront terminates. 29