This patch includes the per-device permissive flag as described by its
original author, Ryan:
"The permissive flag was added to the PCI Backend to disable the PCI
Backend''s "read-only by default" stance to allow devices in
driver
domains to write to registers within a device''s configuration space.
This flag was global for all devices controlled by the PCI Backend in
all domains. This patch removes the global flag and instead adds a
per-device flag. Permissive mode for a particular device can be enabled
by writing the device''s slot number to a sysfs attribute
(/sys/bus/pci/drivers/pciback/permissive). That sysfs node can also be
read to list all devices for which permissive mode is enabled. However,
once enabled, this patch provides no interface to turn permissive mode
off for a device. Please unbind the device from the backend and re-bind
it if you need that capability for now."
NB: This patch provides a feature that is independent of preceding
patch, however because the two affect the same areas it is important to
either apply patch 1/5 first (if you want both patches) OR manually
extract and apply the changes from this patch (if you want just the
per-device patch).
Signed-off-by: Chris Bookholt <hap10@tycho.ncsc.mil>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
