Commit | Line | Data |
---|---|---|
27fb7f00 RD |
1 | menu "Xen driver support" |
2 | depends on XEN | |
3 | ||
1775826c JF |
4 | config XEN_BALLOON |
5 | bool "Xen memory balloon driver" | |
1775826c JF |
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 | ||
a50777c7 DM |
12 | config XEN_SELFBALLOONING |
13 | bool "Dynamically self-balloon kernel memory to target" | |
65d4b248 | 14 | depends on XEN && XEN_BALLOON && CLEANCACHE && SWAP && XEN_TMEM |
a50777c7 DM |
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- | |
ed4f346a | 21 | ballooning is disabled by default. If FRONTSWAP is configured, |
a50777c7 | 22 | frontswap-selfshrinking is enabled by default but can be disabled |
54598d1b | 23 | with the 'tmem.selfshrink=0' kernel boot parameter; and self-ballooning |
ed4f346a | 24 | is enabled by default but can be disabled with the 'tmem.selfballooning=0' |
a50777c7 DM |
25 | kernel boot parameter. Note that systems without a sufficiently |
26 | large swap device should not enable self-ballooning. | |
1775826c | 27 | |
080e2be7 DK |
28 | config XEN_BALLOON_MEMORY_HOTPLUG |
29 | bool "Memory hotplug support for Xen balloon driver" | |
30 | default n | |
31 | depends on XEN_BALLOON && MEMORY_HOTPLUG | |
32 | help | |
33 | Memory hotplug support for Xen balloon driver allows expanding memory | |
34 | available for the system above limit declared at system startup. | |
35 | It is very useful on critical systems which require long | |
36 | run without rebooting. | |
37 | ||
38 | Memory could be hotplugged in following steps: | |
39 | ||
703fc13a VK |
40 | 1) target domain: ensure that memory auto online policy is in |
41 | effect by checking /sys/devices/system/memory/auto_online_blocks | |
42 | file (should be 'online'). | |
43 | ||
44 | 2) control domain: xl mem-max <target-domain> <maxmem> | |
080e2be7 DK |
45 | where <maxmem> is >= requested memory size, |
46 | ||
703fc13a | 47 | 3) control domain: xl mem-set <target-domain> <memory> |
080e2be7 DK |
48 | where <memory> is requested memory size; alternatively memory |
49 | could be added by writing proper value to | |
50 | /sys/devices/system/xen_memory/xen_memory0/target or | |
703fc13a VK |
51 | /sys/devices/system/xen_memory/xen_memory0/target_kb on the |
52 | target domain. | |
080e2be7 | 53 | |
703fc13a VK |
54 | Alternatively, if memory auto onlining was not requested at step 1 |
55 | the newly added memory can be manually onlined in the target domain | |
56 | by doing the following: | |
080e2be7 | 57 | |
703fc13a VK |
58 | for i in /sys/devices/system/memory/memory*/state; do \ |
59 | [ "`cat "$i"`" = offline ] && echo online > "$i"; done | |
080e2be7 | 60 | |
703fc13a | 61 | or by adding the following line to udev rules: |
080e2be7 | 62 | |
703fc13a | 63 | SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'" |
080e2be7 | 64 | |
633d6f17 JG |
65 | config XEN_BALLOON_MEMORY_HOTPLUG_LIMIT |
66 | int "Hotplugged memory limit (in GiB) for a PV guest" | |
67 | default 512 if X86_64 | |
68 | default 4 if X86_32 | |
69 | range 0 64 if X86_32 | |
70 | depends on XEN_HAVE_PVMMU | |
71 | depends on XEN_BALLOON_MEMORY_HOTPLUG | |
72 | help | |
73 | Maxmium amount of memory (in GiB) that a PV guest can be | |
74 | expanded to when using memory hotplug. | |
75 | ||
76 | A PV guest can have more memory than this limit if is | |
77 | started with a larger maximum. | |
78 | ||
79 | This value is used to allocate enough space in internal | |
80 | tables needed for physical memory administration. | |
81 | ||
1775826c JF |
82 | config XEN_SCRUB_PAGES |
83 | bool "Scrub pages before returning them to system" | |
84 | depends on XEN_BALLOON | |
85 | default y | |
86 | help | |
87 | Scrub pages before returning them to the system for reuse by | |
88 | other domains. This makes sure that any confidential data | |
89 | is not accidentally visible to other domains. Is it more | |
90 | secure, but slightly less efficient. | |
91 | If in doubt, say yes. | |
1107ba88 | 92 | |
f7116284 IC |
93 | config XEN_DEV_EVTCHN |
94 | tristate "Xen /dev/xen/evtchn device" | |
f7116284 IC |
95 | default y |
96 | help | |
6b2aac42 | 97 | The evtchn driver allows a userspace process to trigger event |
f7116284 IC |
98 | channels and to receive notification of an event channel |
99 | firing. | |
100 | If in doubt, say yes. | |
101 | ||
df660251 | 102 | config XEN_BACKEND |
329620a8 | 103 | bool "Backend driver support" |
df660251 IC |
104 | depends on XEN_DOM0 |
105 | default y | |
106 | help | |
107 | Support for backend device drivers that provide I/O services | |
108 | to other virtual machines. | |
109 | ||
1107ba88 AZ |
110 | config XENFS |
111 | tristate "Xen filesystem" | |
d8414d3c | 112 | select XEN_PRIVCMD |
1107ba88 AZ |
113 | default y |
114 | help | |
115 | The xen filesystem provides a way for domains to share | |
116 | information with each other and with the hypervisor. | |
117 | For example, by reading and writing the "xenbus" file, guests | |
118 | may pass arbitrary information to the initial domain. | |
119 | If in doubt, say yes. | |
120 | ||
121 | config XEN_COMPAT_XENFS | |
122 | bool "Create compatibility mount point /proc/xen" | |
123 | depends on XENFS | |
124 | default y | |
125 | help | |
126 | The old xenstore userspace tools expect to find "xenbus" | |
127 | under /proc/xen, but "xenbus" is now found at the root of the | |
128 | xenfs filesystem. Selecting this causes the kernel to create | |
692105b8 | 129 | the compatibility mount point /proc/xen if it is running on |
1107ba88 AZ |
130 | a xen platform. |
131 | If in doubt, say yes. | |
132 | ||
cff7e81b JF |
133 | config XEN_SYS_HYPERVISOR |
134 | bool "Create xen entries under /sys/hypervisor" | |
27fb7f00 | 135 | depends on SYSFS |
cff7e81b JF |
136 | select SYS_HYPERVISOR |
137 | default y | |
138 | help | |
139 | Create entries under /sys/hypervisor describing the Xen | |
140 | hypervisor environment. When running native or in another | |
141 | virtual environment, /sys/hypervisor will still be present, | |
27fb7f00 RD |
142 | but will have no xen contents. |
143 | ||
2de06cc1 | 144 | config XEN_XENBUS_FRONTEND |
9c4bc1c2 LT |
145 | tristate |
146 | ||
ab31523c GH |
147 | config XEN_GNTDEV |
148 | tristate "userspace grant access device driver" | |
149 | depends on XEN | |
1f169f66 | 150 | default m |
ab31523c GH |
151 | select MMU_NOTIFIER |
152 | help | |
153 | Allows userspace processes to use grants. | |
6bac7f9f | 154 | |
dd314058 DDG |
155 | config XEN_GRANT_DEV_ALLOC |
156 | tristate "User-space grant reference allocator driver" | |
157 | depends on XEN | |
1f169f66 | 158 | default m |
dd314058 DDG |
159 | help |
160 | Allows userspace processes to create pages with access granted | |
161 | to other domains. This can be used to implement frontend drivers | |
162 | or as part of an inter-domain shared memory channel. | |
163 | ||
b097186f KRW |
164 | config SWIOTLB_XEN |
165 | def_bool y | |
2775609c | 166 | select SWIOTLB |
b097186f | 167 | |
afec6e04 | 168 | config XEN_TMEM |
10a7a077 | 169 | tristate |
741ddbcf | 170 | depends on !ARM && !ARM64 |
10a7a077 | 171 | default m if (CLEANCACHE || FRONTSWAP) |
afec6e04 DM |
172 | help |
173 | Shim to interface in-kernel Transcendent Memory hooks | |
174 | (e.g. cleancache and frontswap) to Xen tmem hypercalls. | |
175 | ||
30edc14b KRW |
176 | config XEN_PCIDEV_BACKEND |
177 | tristate "Xen PCI-device backend driver" | |
178 | depends on PCI && X86 && XEN | |
179 | depends on XEN_BACKEND | |
2ebdc426 | 180 | default m |
30edc14b KRW |
181 | help |
182 | The PCI device backend driver allows the kernel to export arbitrary | |
183 | PCI devices to other guests. If you select this to be a module, you | |
184 | will need to make sure no other driver has bound to the device(s) | |
185 | you want to make visible to other guests. | |
186 | ||
2ebdc426 KRW |
187 | The parameter "passthrough" allows you specify how you want the PCI |
188 | devices to appear in the guest. You can choose the default (0) where | |
189 | PCI topology starts at 00.00.0, or (1) for passthrough if you want | |
190 | the PCI devices topology appear the same as in the host. | |
30edc14b | 191 | |
2ebdc426 KRW |
192 | The "hide" parameter (only applicable if backend driver is compiled |
193 | into the kernel) allows you to bind the PCI devices to this module | |
194 | from the default device drivers. The argument is the list of PCI BDFs: | |
195 | xen-pciback.hide=(03:00.0)(04:00.0) | |
30edc14b | 196 | |
2ebdc426 | 197 | If in doubt, say m. |
d8414d3c | 198 | |
d9d660f6 JG |
199 | config XEN_SCSI_BACKEND |
200 | tristate "XEN SCSI backend driver" | |
201 | depends on XEN && XEN_BACKEND && TARGET_CORE | |
202 | help | |
203 | The SCSI backend driver allows the kernel to export its SCSI Devices | |
204 | to other guests via a high-performance shared-memory interface. | |
205 | Only needed for systems running as XEN driver domains (e.g. Dom0) and | |
206 | if guests need generic access to SCSI devices. | |
207 | ||
d8414d3c BB |
208 | config XEN_PRIVCMD |
209 | tristate | |
210 | depends on XEN | |
211 | default m | |
212 | ||
dcb93b96 LJ |
213 | config XEN_STUB |
214 | bool "Xen stub drivers" | |
76fc2537 | 215 | depends on XEN && X86_64 && BROKEN |
dcb93b96 LJ |
216 | default n |
217 | help | |
218 | Allow kernel to install stub drivers, to reserve space for Xen drivers, | |
219 | i.e. memory hotplug and cpu hotplug, and to block native drivers loaded, | |
220 | so that real Xen drivers can be modular. | |
221 | ||
222 | To enable Xen features like cpu and memory hotplug, select Y here. | |
223 | ||
ef92e7ca LJ |
224 | config XEN_ACPI_HOTPLUG_MEMORY |
225 | tristate "Xen ACPI memory hotplug" | |
226 | depends on XEN_DOM0 && XEN_STUB && ACPI | |
227 | default n | |
228 | help | |
229 | This is Xen ACPI memory hotplug. | |
230 | ||
231 | Currently Xen only support ACPI memory hot-add. If you want | |
232 | to hot-add memory at runtime (the hot-added memory cannot be | |
233 | removed until machine stop), select Y/M here, otherwise select N. | |
234 | ||
39adc483 LJ |
235 | config XEN_ACPI_HOTPLUG_CPU |
236 | tristate "Xen ACPI cpu hotplug" | |
237 | depends on XEN_DOM0 && XEN_STUB && ACPI | |
238 | select ACPI_CONTAINER | |
239 | default n | |
240 | help | |
241 | Xen ACPI cpu enumerating and hotplugging | |
242 | ||
243 | For hotplugging, currently Xen only support ACPI cpu hotadd. | |
244 | If you want to hotadd cpu at runtime (the hotadded cpu cannot | |
245 | be removed until machine stop), select Y/M here. | |
246 | ||
59a56802 KRW |
247 | config XEN_ACPI_PROCESSOR |
248 | tristate "Xen ACPI processor" | |
df7a3ee2 | 249 | depends on XEN && X86 && ACPI_PROCESSOR && CPU_FREQ |
102b208e | 250 | default m |
59a56802 | 251 | help |
1fd14432 AM |
252 | This ACPI processor uploads Power Management information to the Xen |
253 | hypervisor. | |
254 | ||
255 | To do that the driver parses the Power Management data and uploads | |
256 | said information to the Xen hypervisor. Then the Xen hypervisor can | |
5065a706 | 257 | select the proper Cx and Pxx states. It also registers itself as the |
1fd14432 AM |
258 | SMM so that other drivers (such as ACPI cpufreq scaling driver) will |
259 | not load. | |
260 | ||
261 | To compile this driver as a module, choose M here: the module will be | |
262 | called xen_acpi_processor If you do not know what to choose, select | |
263 | M here. If the CPUFREQ drivers are built in, select Y here. | |
59a56802 | 264 | |
cef12ee5 LJ |
265 | config XEN_MCE_LOG |
266 | bool "Xen platform mcelog" | |
267 | depends on XEN_DOM0 && X86_64 && X86_MCE | |
268 | default n | |
269 | help | |
270 | Allow kernel fetching MCE error from Xen platform and | |
271 | converting it into Linux mcelog format for mcelog tools | |
272 | ||
c2374bf5 IC |
273 | config XEN_HAVE_PVMMU |
274 | bool | |
275 | ||
be81c8a1 DK |
276 | config XEN_EFI |
277 | def_bool y | |
278 | depends on X86_64 && EFI | |
279 | ||
628c28ee DV |
280 | config XEN_AUTO_XLATE |
281 | def_bool y | |
282 | depends on ARM || ARM64 || XEN_PVHVM | |
283 | help | |
284 | Support for auto-translated physmap guests. | |
285 | ||
42068cfd HG |
286 | config XEN_ACPI |
287 | def_bool y | |
288 | depends on X86 && ACPI | |
289 | ||
a11f4f0a BO |
290 | config XEN_SYMS |
291 | bool "Xen symbols" | |
292 | depends on X86 && XEN_DOM0 && XENFS | |
293 | default y if KALLSYMS | |
294 | help | |
295 | Exports hypervisor symbols (along with their types and addresses) via | |
296 | /proc/xen/xensyms file, similar to /proc/kallsyms | |
297 | ||
5f141548 BO |
298 | config XEN_HAVE_VPMU |
299 | bool | |
300 | ||
27fb7f00 | 301 | endmenu |