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lastdragon
2026-09-06 12:53:21 -06:00
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linux-7.2.3/Documentation/ABI/testing/sysfs-driver-pciback
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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.
What: /sys/bus/pci/drivers/pciback/allow_interrupt_control
Date: Jan 2020
KernelVersion: 5.6
Contact: xen-devel@lists.xenproject.org
Description:
List of devices which can have interrupt control flag (INTx,
MSI, MSI-X) set by a connected guest. It is meant to be set
only when the guest is a stubdomain hosting device model (qemu)
and the actual device is assigned to a HVM. It is not safe
(similar to permissive attribute) to set for a devices assigned
to a PV guest. The device is automatically removed from this
list when the connected pcifront terminates.