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George Dunlap authored
By default pciback only allows PV guests to write "known safe" values into PCI config space. But many devices require writes to other areas of config space in order to operate properly. One way to do that is with the "quirks" interface, which specifies areas known safe to a particular device; the other way is to mark a device as "permissive", which tells pciback to allow all config space writes for that domain and device. This adds a "permissive" flag to the libxl_pci struct and teaches libxl how to write the appropriate value into sysfs to enable the permissive feature for devices being passed through. It also adds the permissive config options either on a per-device basis, or as a global option in the xl command-line. Because of the potential stability and security implications of enabling permissive, the flag is left off by default. Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson.citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
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