| menu "Xen driver support" |
| depends on XEN |
| |
| config XEN_BALLOON |
| bool "Xen memory balloon driver" |
| 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. |
| |
| config XEN_DEV_EVTCHN |
| tristate "Xen /dev/xen/evtchn device" |
| default y |
| help |
| The evtchn driver allows a userspace process to triger event |
| channels and to receive notification of an event channel |
| firing. |
| If in doubt, say yes. |
| |
| config XEN_BACKEND |
| bool "Backend driver support" |
| depends on XEN_DOM0 |
| default y |
| help |
| Support for backend device drivers that provide I/O services |
| to other virtual machines. |
| |
| config XENFS |
| tristate "Xen filesystem" |
| default y |
| help |
| The xen filesystem provides a way for domains to share |
| information with each other and with the hypervisor. |
| For example, by reading and writing the "xenbus" file, guests |
| may pass arbitrary information to the initial domain. |
| If in doubt, say yes. |
| |
| config XEN_COMPAT_XENFS |
| bool "Create compatibility mount point /proc/xen" |
| depends on XENFS |
| default y |
| help |
| The old xenstore userspace tools expect to find "xenbus" |
| under /proc/xen, but "xenbus" is now found at the root of the |
| xenfs filesystem. Selecting this causes the kernel to create |
| the compatibility mount point /proc/xen if it is running on |
| a xen platform. |
| If in doubt, say yes. |
| |
| config XEN_SYS_HYPERVISOR |
| bool "Create xen entries under /sys/hypervisor" |
| depends on SYSFS |
| select SYS_HYPERVISOR |
| default y |
| help |
| Create entries under /sys/hypervisor describing the Xen |
| hypervisor environment. When running native or in another |
| virtual environment, /sys/hypervisor will still be present, |
| but will have no xen contents. |
| |
| config XEN_XENBUS_FRONTEND |
| tristate |
| |
| config XEN_GNTDEV |
| tristate "userspace grant access device driver" |
| depends on XEN |
| select MMU_NOTIFIER |
| help |
| Allows userspace processes to use grants. |
| |
| config XEN_GRANT_DEV_ALLOC |
| tristate "User-space grant reference allocator driver" |
| depends on XEN |
| help |
| Allows userspace processes to create pages with access granted |
| to other domains. This can be used to implement frontend drivers |
| or as part of an inter-domain shared memory channel. |
| |
| config XEN_PLATFORM_PCI |
| tristate "xen platform pci device driver" |
| depends on XEN_PVHVM && PCI |
| default m |
| help |
| Driver for the Xen PCI Platform device: it is responsible for |
| initializing xenbus and grant_table when running in a Xen HVM |
| domain. As a consequence this driver is required to run any Xen PV |
| frontend on Xen HVM. |
| |
| config SWIOTLB_XEN |
| def_bool y |
| depends on PCI |
| select SWIOTLB |
| |
| endmenu |