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-rw-r--r--drivers/xen/Kconfig19
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diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
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+config XEN_BALLOON
+ bool "Xen memory balloon driver"
+ depends on XEN
+ default y
+ help
+ The balloon driver allows the Xen domain to request more memory from
+ the system to expand the domain's memory allocation, or alternatively
+ return unneeded memory to the system.
+
+config XEN_SCRUB_PAGES
+ bool "Scrub pages before returning them to system"
+ depends on XEN_BALLOON
+ default y
+ help
+ Scrub pages before returning them to the system for reuse by
+ other domains. This makes sure that any confidential data
+ is not accidentally visible to other domains. Is it more
+ secure, but slightly less efficient.
+ If in doubt, say yes.