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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"
Arnd Bergmannf880b672012-10-09 10:33:52 +00006 depends on !ARM
Jeremy Fitzhardinge17758262008-04-02 10:54:13 -07007 default y
8 help
9 The balloon driver allows the Xen domain to request more memory from
10 the system to expand the domain's memory allocation, or alternatively
11 return unneeded memory to the system.
12
Dan Magenheimera50777c2011-07-08 12:26:21 -060013config XEN_SELFBALLOONING
14 bool "Dynamically self-balloon kernel memory to target"
Konrad Rzeszutek Wilk65d4b242011-07-30 11:21:09 -040015 depends on XEN && XEN_BALLOON && CLEANCACHE && SWAP && XEN_TMEM
Dan Magenheimera50777c2011-07-08 12:26:21 -060016 default n
17 help
18 Self-ballooning dynamically balloons available kernel memory driven
19 by the current usage of anonymous memory ("committed AS") and
20 controlled by various sysfs-settable parameters. Configuring
21 FRONTSWAP is highly recommended; if it is not configured, self-
Konrad Rzeszutek Wilked4f3462013-05-08 16:52:38 -040022 ballooning is disabled by default. If FRONTSWAP is configured,
Dan Magenheimera50777c2011-07-08 12:26:21 -060023 frontswap-selfshrinking is enabled by default but can be disabled
Konrad Rzeszutek Wilk54598d12013-05-08 16:44:06 -040024 with the 'tmem.selfshrink=0' kernel boot parameter; and self-ballooning
Konrad Rzeszutek Wilked4f3462013-05-08 16:52:38 -040025 is enabled by default but can be disabled with the 'tmem.selfballooning=0'
Dan Magenheimera50777c2011-07-08 12:26:21 -060026 kernel boot parameter. Note that systems without a sufficiently
27 large swap device should not enable self-ballooning.
28
Daniel Kiper080e2be2011-07-25 17:12:06 -070029config XEN_BALLOON_MEMORY_HOTPLUG
30 bool "Memory hotplug support for Xen balloon driver"
31 default n
32 depends on XEN_BALLOON && MEMORY_HOTPLUG
33 help
34 Memory hotplug support for Xen balloon driver allows expanding memory
35 available for the system above limit declared at system startup.
36 It is very useful on critical systems which require long
37 run without rebooting.
38
39 Memory could be hotplugged in following steps:
40
41 1) dom0: xl mem-max <domU> <maxmem>
42 where <maxmem> is >= requested memory size,
43
44 2) dom0: xl mem-set <domU> <memory>
45 where <memory> is requested memory size; alternatively memory
46 could be added by writing proper value to
47 /sys/devices/system/xen_memory/xen_memory0/target or
48 /sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,
49
50 3) domU: for i in /sys/devices/system/memory/memory*/state; do \
51 [ "`cat "$i"`" = offline ] && echo online > "$i"; done
52
53 Memory could be onlined automatically on domU by adding following line to udev rules:
54
55 SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"
56
57 In that case step 3 should be omitted.
58
Jeremy Fitzhardinge17758262008-04-02 10:54:13 -070059config XEN_SCRUB_PAGES
60 bool "Scrub pages before returning them to system"
61 depends on XEN_BALLOON
62 default y
63 help
64 Scrub pages before returning them to the system for reuse by
65 other domains. This makes sure that any confidential data
66 is not accidentally visible to other domains. Is it more
67 secure, but slightly less efficient.
68 If in doubt, say yes.
Alex Zeffertt1107ba82009-01-07 18:07:11 -080069
Ian Campbellf7116282009-02-06 19:21:19 -080070config XEN_DEV_EVTCHN
71 tristate "Xen /dev/xen/evtchn device"
Ian Campbellf7116282009-02-06 19:21:19 -080072 default y
73 help
Masanari Iida6b2aac42012-04-14 00:14:11 +090074 The evtchn driver allows a userspace process to trigger event
Ian Campbellf7116282009-02-06 19:21:19 -080075 channels and to receive notification of an event channel
76 firing.
77 If in doubt, say yes.
78
Ian Campbelldf660252009-02-09 12:05:51 -080079config XEN_BACKEND
Jeremy Fitzhardinge329620a2009-03-21 23:29:34 -070080 bool "Backend driver support"
Ian Campbelldf660252009-02-09 12:05:51 -080081 depends on XEN_DOM0
82 default y
83 help
84 Support for backend device drivers that provide I/O services
85 to other virtual machines.
86
Alex Zeffertt1107ba82009-01-07 18:07:11 -080087config XENFS
88 tristate "Xen filesystem"
Bastian Blankd8414d32011-12-16 11:34:33 -050089 select XEN_PRIVCMD
Alex Zeffertt1107ba82009-01-07 18:07:11 -080090 default y
91 help
92 The xen filesystem provides a way for domains to share
93 information with each other and with the hypervisor.
94 For example, by reading and writing the "xenbus" file, guests
95 may pass arbitrary information to the initial domain.
96 If in doubt, say yes.
97
98config XEN_COMPAT_XENFS
99 bool "Create compatibility mount point /proc/xen"
100 depends on XENFS
101 default y
102 help
103 The old xenstore userspace tools expect to find "xenbus"
104 under /proc/xen, but "xenbus" is now found at the root of the
105 xenfs filesystem. Selecting this causes the kernel to create
Matt LaPlante692105b2009-01-26 11:12:25 +0100106 the compatibility mount point /proc/xen if it is running on
Alex Zeffertt1107ba82009-01-07 18:07:11 -0800107 a xen platform.
108 If in doubt, say yes.
109
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700110config XEN_SYS_HYPERVISOR
111 bool "Create xen entries under /sys/hypervisor"
Randy Dunlap27fb7f02010-03-05 13:44:18 -0800112 depends on SYSFS
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700113 select SYS_HYPERVISOR
114 default y
115 help
116 Create entries under /sys/hypervisor describing the Xen
117 hypervisor environment. When running native or in another
118 virtual environment, /sys/hypervisor will still be present,
Randy Dunlap27fb7f02010-03-05 13:44:18 -0800119 but will have no xen contents.
120
Ian Campbell2de06cc2009-02-09 12:05:51 -0800121config XEN_XENBUS_FRONTEND
Linus Torvalds9c4bc1c2011-01-13 18:46:48 -0800122 tristate
123
Gerd Hoffmannab315232010-12-14 18:40:46 +0000124config XEN_GNTDEV
125 tristate "userspace grant access device driver"
126 depends on XEN
Stefano Stabellini1f169f62011-02-10 12:08:21 +0000127 default m
Gerd Hoffmannab315232010-12-14 18:40:46 +0000128 select MMU_NOTIFIER
129 help
130 Allows userspace processes to use grants.
Ian Campbell6bac7f92010-12-10 14:39:15 +0000131
Daniel De Graafdd314052011-02-07 17:23:05 -0500132config XEN_GRANT_DEV_ALLOC
133 tristate "User-space grant reference allocator driver"
134 depends on XEN
Stefano Stabellini1f169f62011-02-10 12:08:21 +0000135 default m
Daniel De Graafdd314052011-02-07 17:23:05 -0500136 help
137 Allows userspace processes to create pages with access granted
138 to other domains. This can be used to implement frontend drivers
139 or as part of an inter-domain shared memory channel.
140
Konrad Rzeszutek Wilkb0971862010-05-11 10:05:49 -0400141config SWIOTLB_XEN
142 def_bool y
Arnd Bergmanne8b404d2013-05-02 17:16:22 +0200143 depends on PCI && X86
Konrad Rzeszutek Wilk27756092010-10-08 11:06:20 -0400144 select SWIOTLB
Konrad Rzeszutek Wilkb0971862010-05-11 10:05:49 -0400145
Dan Magenheimerafec6e02011-06-17 15:06:20 -0600146config XEN_TMEM
Dan Magenheimer10a7a0772013-04-30 15:27:00 -0700147 tristate
Stefano Stabellini741ddbc2013-07-23 17:46:58 +0100148 depends on !ARM && !ARM64
Dan Magenheimer10a7a0772013-04-30 15:27:00 -0700149 default m if (CLEANCACHE || FRONTSWAP)
Dan Magenheimerafec6e02011-06-17 15:06:20 -0600150 help
151 Shim to interface in-kernel Transcendent Memory hooks
152 (e.g. cleancache and frontswap) to Xen tmem hypercalls.
153
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400154config XEN_PCIDEV_BACKEND
155 tristate "Xen PCI-device backend driver"
156 depends on PCI && X86 && XEN
157 depends on XEN_BACKEND
Konrad Rzeszutek Wilk2ebdc422011-07-11 16:49:41 -0400158 default m
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400159 help
160 The PCI device backend driver allows the kernel to export arbitrary
161 PCI devices to other guests. If you select this to be a module, you
162 will need to make sure no other driver has bound to the device(s)
163 you want to make visible to other guests.
164
Konrad Rzeszutek Wilk2ebdc422011-07-11 16:49:41 -0400165 The parameter "passthrough" allows you specify how you want the PCI
166 devices to appear in the guest. You can choose the default (0) where
167 PCI topology starts at 00.00.0, or (1) for passthrough if you want
168 the PCI devices topology appear the same as in the host.
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400169
Konrad Rzeszutek Wilk2ebdc422011-07-11 16:49:41 -0400170 The "hide" parameter (only applicable if backend driver is compiled
171 into the kernel) allows you to bind the PCI devices to this module
172 from the default device drivers. The argument is the list of PCI BDFs:
173 xen-pciback.hide=(03:00.0)(04:00.0)
Konrad Rzeszutek Wilk30edc142009-10-13 17:22:20 -0400174
Konrad Rzeszutek Wilk2ebdc422011-07-11 16:49:41 -0400175 If in doubt, say m.
Bastian Blankd8414d32011-12-16 11:34:33 -0500176
177config XEN_PRIVCMD
178 tristate
179 depends on XEN
180 default m
181
Liu Jinsongdcb93b92013-01-24 20:16:59 +0800182config XEN_STUB
183 bool "Xen stub drivers"
Konrad Rzeszutek Wilk76fc2532013-03-22 10:15:47 -0400184 depends on XEN && X86_64 && BROKEN
Liu Jinsongdcb93b92013-01-24 20:16:59 +0800185 default n
186 help
187 Allow kernel to install stub drivers, to reserve space for Xen drivers,
188 i.e. memory hotplug and cpu hotplug, and to block native drivers loaded,
189 so that real Xen drivers can be modular.
190
191 To enable Xen features like cpu and memory hotplug, select Y here.
192
Liu Jinsongef92e7c2013-01-24 20:19:47 +0800193config XEN_ACPI_HOTPLUG_MEMORY
194 tristate "Xen ACPI memory hotplug"
195 depends on XEN_DOM0 && XEN_STUB && ACPI
196 default n
197 help
198 This is Xen ACPI memory hotplug.
199
200 Currently Xen only support ACPI memory hot-add. If you want
201 to hot-add memory at runtime (the hot-added memory cannot be
202 removed until machine stop), select Y/M here, otherwise select N.
203
Liu Jinsong39adc482013-01-25 15:43:34 +0800204config XEN_ACPI_HOTPLUG_CPU
205 tristate "Xen ACPI cpu hotplug"
206 depends on XEN_DOM0 && XEN_STUB && ACPI
207 select ACPI_CONTAINER
208 default n
209 help
210 Xen ACPI cpu enumerating and hotplugging
211
212 For hotplugging, currently Xen only support ACPI cpu hotadd.
213 If you want to hotadd cpu at runtime (the hotadded cpu cannot
214 be removed until machine stop), select Y/M here.
215
Konrad Rzeszutek Wilk59a56802012-02-03 16:03:20 -0500216config XEN_ACPI_PROCESSOR
217 tristate "Xen ACPI processor"
Konrad Rzeszutek Wilkdf7a3ee2012-03-24 09:18:57 -0400218 depends on XEN && X86 && ACPI_PROCESSOR && CPU_FREQ
Konrad Rzeszutek Wilk102b2082012-03-13 13:28:12 -0400219 default m
Konrad Rzeszutek Wilk59a56802012-02-03 16:03:20 -0500220 help
Andrew Morton1fd14432012-05-04 14:04:12 -0700221 This ACPI processor uploads Power Management information to the Xen
222 hypervisor.
Konrad Rzeszutek Wilk59a56802012-02-03 16:03:20 -0500223
Andrew Morton1fd14432012-05-04 14:04:12 -0700224 To do that the driver parses the Power Management data and uploads
225 said information to the Xen hypervisor. Then the Xen hypervisor can
226 select the proper Cx and Pxx states. It also registers itslef as the
227 SMM so that other drivers (such as ACPI cpufreq scaling driver) will
228 not load.
Konrad Rzeszutek Wilk59a56802012-02-03 16:03:20 -0500229
Andrew Morton1fd14432012-05-04 14:04:12 -0700230 To compile this driver as a module, choose M here: the module will be
231 called xen_acpi_processor If you do not know what to choose, select
232 M here. If the CPUFREQ drivers are built in, select Y here.
Konrad Rzeszutek Wilk59a56802012-02-03 16:03:20 -0500233
Liu, Jinsongcef12ee2012-06-07 19:56:51 +0800234config XEN_MCE_LOG
235 bool "Xen platform mcelog"
236 depends on XEN_DOM0 && X86_64 && X86_MCE
237 default n
238 help
239 Allow kernel fetching MCE error from Xen platform and
240 converting it into Linux mcelog format for mcelog tools
241
Ian Campbellc2374bf2012-10-03 12:17:50 +0100242config XEN_HAVE_PVMMU
243 bool
244
Randy Dunlap27fb7f02010-03-05 13:44:18 -0800245endmenu