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Randy Dunlap27fb7f02010-03-05 13:44:18 -08001menu "Xen driver support"
2 depends on XEN
3
Jeremy Fitzhardinge17758262008-04-02 10:54:13 -07004config XEN_BALLOON
5 bool "Xen memory balloon driver"
Jeremy Fitzhardinge17758262008-04-02 10:54:13 -07006 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
Dan Magenheimera50777c2011-07-08 12:26:21 -060012config XEN_SELFBALLOONING
13 bool "Dynamically self-balloon kernel memory to target"
14 depends on XEN && XEN_BALLOON && CLEANCACHE && SWAP
15 default n
16 help
17 Self-ballooning dynamically balloons available kernel memory driven
18 by the current usage of anonymous memory ("committed AS") and
19 controlled by various sysfs-settable parameters. Configuring
20 FRONTSWAP is highly recommended; if it is not configured, self-
21 ballooning is disabled by default but can be enabled with the
22 'selfballooning' kernel boot parameter. If FRONTSWAP is configured,
23 frontswap-selfshrinking is enabled by default but can be disabled
24 with the 'noselfshrink' kernel boot parameter; and self-ballooning
25 is enabled by default but can be disabled with the 'noselfballooning'
26 kernel boot parameter. Note that systems without a sufficiently
27 large swap device should not enable self-ballooning.
28
Jeremy Fitzhardinge17758262008-04-02 10:54:13 -070029config XEN_SCRUB_PAGES
30 bool "Scrub pages before returning them to system"
31 depends on XEN_BALLOON
32 default y
33 help
34 Scrub pages before returning them to the system for reuse by
35 other domains. This makes sure that any confidential data
36 is not accidentally visible to other domains. Is it more
37 secure, but slightly less efficient.
38 If in doubt, say yes.
Alex Zeffertt1107ba82009-01-07 18:07:11 -080039
Ian Campbellf7116282009-02-06 19:21:19 -080040config XEN_DEV_EVTCHN
41 tristate "Xen /dev/xen/evtchn device"
Ian Campbellf7116282009-02-06 19:21:19 -080042 default y
43 help
44 The evtchn driver allows a userspace process to triger event
45 channels and to receive notification of an event channel
46 firing.
47 If in doubt, say yes.
48
Ian Campbelldf660252009-02-09 12:05:51 -080049config XEN_BACKEND
Jeremy Fitzhardinge329620a2009-03-21 23:29:34 -070050 bool "Backend driver support"
Ian Campbelldf660252009-02-09 12:05:51 -080051 depends on XEN_DOM0
52 default y
53 help
54 Support for backend device drivers that provide I/O services
55 to other virtual machines.
56
Alex Zeffertt1107ba82009-01-07 18:07:11 -080057config XENFS
58 tristate "Xen filesystem"
Alex Zeffertt1107ba82009-01-07 18:07:11 -080059 default y
60 help
61 The xen filesystem provides a way for domains to share
62 information with each other and with the hypervisor.
63 For example, by reading and writing the "xenbus" file, guests
64 may pass arbitrary information to the initial domain.
65 If in doubt, say yes.
66
67config XEN_COMPAT_XENFS
68 bool "Create compatibility mount point /proc/xen"
69 depends on XENFS
70 default y
71 help
72 The old xenstore userspace tools expect to find "xenbus"
73 under /proc/xen, but "xenbus" is now found at the root of the
74 xenfs filesystem. Selecting this causes the kernel to create
Matt LaPlante692105b2009-01-26 11:12:25 +010075 the compatibility mount point /proc/xen if it is running on
Alex Zeffertt1107ba82009-01-07 18:07:11 -080076 a xen platform.
77 If in doubt, say yes.
78
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -070079config XEN_SYS_HYPERVISOR
80 bool "Create xen entries under /sys/hypervisor"
Randy Dunlap27fb7f02010-03-05 13:44:18 -080081 depends on SYSFS
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -070082 select SYS_HYPERVISOR
83 default y
84 help
85 Create entries under /sys/hypervisor describing the Xen
86 hypervisor environment. When running native or in another
87 virtual environment, /sys/hypervisor will still be present,
Randy Dunlap27fb7f02010-03-05 13:44:18 -080088 but will have no xen contents.
89
Ian Campbell2de06cc2009-02-09 12:05:51 -080090config XEN_XENBUS_FRONTEND
Linus Torvalds9c4bc1c2011-01-13 18:46:48 -080091 tristate
92
Gerd Hoffmannab315232010-12-14 18:40:46 +000093config XEN_GNTDEV
94 tristate "userspace grant access device driver"
95 depends on XEN
Stefano Stabellini1f169f62011-02-10 12:08:21 +000096 default m
Gerd Hoffmannab315232010-12-14 18:40:46 +000097 select MMU_NOTIFIER
98 help
99 Allows userspace processes to use grants.
Ian Campbell6bac7f92010-12-10 14:39:15 +0000100
Daniel De Graafdd314052011-02-07 17:23:05 -0500101config XEN_GRANT_DEV_ALLOC
102 tristate "User-space grant reference allocator driver"
103 depends on XEN
Stefano Stabellini1f169f62011-02-10 12:08:21 +0000104 default m
Daniel De Graafdd314052011-02-07 17:23:05 -0500105 help
106 Allows userspace processes to create pages with access granted
107 to other domains. This can be used to implement frontend drivers
108 or as part of an inter-domain shared memory channel.
109
Stefano Stabellini183d03c2010-05-17 17:08:21 +0100110config XEN_PLATFORM_PCI
111 tristate "xen platform pci device driver"
Konrad Rzeszutek Wilke528db52011-01-12 12:58:06 -0500112 depends on XEN_PVHVM && PCI
Stefano Stabellini183d03c2010-05-17 17:08:21 +0100113 default m
114 help
115 Driver for the Xen PCI Platform device: it is responsible for
116 initializing xenbus and grant_table when running in a Xen HVM
117 domain. As a consequence this driver is required to run any Xen PV
118 frontend on Xen HVM.
Linus Torvalds26f0cf92010-08-12 09:09:41 -0700119
Konrad Rzeszutek Wilkb0971862010-05-11 10:05:49 -0400120config SWIOTLB_XEN
121 def_bool y
Konrad Rzeszutek Wilk27756092010-10-08 11:06:20 -0400122 depends on PCI
123 select SWIOTLB
Konrad Rzeszutek Wilkb0971862010-05-11 10:05:49 -0400124
Randy Dunlap27fb7f02010-03-05 13:44:18 -0800125endmenu