1menu "Xen driver support" 2 depends on XEN 3 4config XEN_BALLOON 5 bool "Xen memory balloon driver" 6 default y 7 help 8 The balloon driver allows the Xen domain to request more memory from 9 the system to expand the domain's memory allocation, or alternatively 10 return unneeded memory to the system. 11 12config XEN_SCRUB_PAGES 13 bool "Scrub pages before returning them to system" 14 depends on XEN_BALLOON 15 default y 16 help 17 Scrub pages before returning them to the system for reuse by 18 other domains. This makes sure that any confidential data 19 is not accidentally visible to other domains. Is it more 20 secure, but slightly less efficient. 21 If in doubt, say yes. 22 23config XEN_DEV_EVTCHN 24 tristate "Xen /dev/xen/evtchn device" 25 default y 26 help 27 The evtchn driver allows a userspace process to triger event 28 channels and to receive notification of an event channel 29 firing. 30 If in doubt, say yes. 31 32config XENFS 33 tristate "Xen filesystem" 34 default y 35 help 36 The xen filesystem provides a way for domains to share 37 information with each other and with the hypervisor. 38 For example, by reading and writing the "xenbus" file, guests 39 may pass arbitrary information to the initial domain. 40 If in doubt, say yes. 41 42config XEN_COMPAT_XENFS 43 bool "Create compatibility mount point /proc/xen" 44 depends on XENFS 45 default y 46 help 47 The old xenstore userspace tools expect to find "xenbus" 48 under /proc/xen, but "xenbus" is now found at the root of the 49 xenfs filesystem. Selecting this causes the kernel to create 50 the compatibility mount point /proc/xen if it is running on 51 a xen platform. 52 If in doubt, say yes. 53 54config XEN_SYS_HYPERVISOR 55 bool "Create xen entries under /sys/hypervisor" 56 depends on SYSFS 57 select SYS_HYPERVISOR 58 default y 59 help 60 Create entries under /sys/hypervisor describing the Xen 61 hypervisor environment. When running native or in another 62 virtual environment, /sys/hypervisor will still be present, 63 but will have no xen contents. 64 65config XEN_PLATFORM_PCI 66 tristate "xen platform pci device driver" 67 depends on XEN_PVHVM 68 default m 69 help 70 Driver for the Xen PCI Platform device: it is responsible for 71 initializing xenbus and grant_table when running in a Xen HVM 72 domain. As a consequence this driver is required to run any Xen PV 73 frontend on Xen HVM. 74 75config SWIOTLB_XEN 76 def_bool y 77 depends on SWIOTLB 78 79endmenu 80