XenBooting: Difference between revisions
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#REDIRECT [[Xen Hypervisor Boot Options]] |
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<!-- MoinMoin name: XenBooting --> |
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<!-- Comment: update for 3.0 --> |
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<!-- WikiMedia name: XenBooting --> |
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<!-- Page revision: 00000003 --> |
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<!-- Original date: Thu Dec 20 07:29:34 2007 (1198135774000000) --> |
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{{TODO|Merge with [[XenHypervisorBootOptions]]}} |
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__NOTOC__ |
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Xen systems are typically booted with GrUB. The GrUB "kernel" is Xen itself. The kernel image for domain 0 is given to grub as the first "module". An initrd for domain 0, if required, is specified as a further module. A number of options can be passed to Xen on the command line. |
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/!\ For an up-to-date list see the [http://www.cl.cam.ac.uk/research/srg/netos/xen/readmes/user/user.html#s:xboot user manual]. Options available on version 3.0 are (with examples for common options): |
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{| border="1" cellpadding="2" cellspacing="0" |
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| '''Parameter''' |
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| Description |
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|<code><nowiki>|dom0_mem=131072</nowiki></code> |
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| Initial domain 0 memory allocation in kBytes |
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|<code><nowiki>|mem=131072</nowiki></code> |
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| Set the physical RAM address limit. (beyond is ignored) |
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|<code><nowiki>|dom0_vcpus_pin</nowiki></code> |
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| Pins domain 0 VCPUs on their respective |
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|- |
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|<code><nowiki>|com1=115200,8n1</nowiki></code> <code><nowiki>com2=</nowiki></code> |
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| Serial console details for Xen (Linux will need its own serial console configuration if required). Format is <baud>,DPS,<io-base>,<irq>. |
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|<code><nowiki>|console=com1</nowiki></code> |
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| Comma-separated list of console outputs (see also [[#xencons|xencons=]]) |
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|- |
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|<code><nowiki>|sync_console</nowiki></code> |
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| Force synchronous console output. |
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|<code><nowiki>|vga=text-80x50</nowiki></code> |
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| ''VGA'' console mode and options |
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|- |
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|<code><nowiki>|conswitch</nowiki></code> |
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| Specify how to switch serial-console input between Xen and DOM0. |
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| Ctrl-A ''three times'' |
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|- |
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|<code><nowiki>|noacpi</nowiki></code> |
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| ACPI tables are not parsed |
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| '''<code><nowiki>noreboot</nowiki></code>''' |
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| Don't reboot the machine automatically on errors. |
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|<code><nowiki>|nosmp</nowiki></code> |
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| Disables secondary processors |
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|<code><nowiki>|ignorebiostables</nowiki></code> |
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| ACPI and MP tables are ignored (implies noacpi, nosmp) |
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|<code><nowiki>|watchdog</nowiki></code> |
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| Run a watchdog NMI on each processor |
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|- |
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|<code><nowiki>|physdev_dom0_hide=</nowiki></code> |
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| List of PCI slots to hide from domain 0, Format is '(%02x:%02x.%1x)(%02x:%02x.%1x)' and so on. |
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|<code><nowiki>|badpage=</nowiki></code> |
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| Comma-separated list of hexadecimal page numbers containing bad bytes. e.g. 'badpage=0x3f45,0x8a321' |
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|<code><nowiki>|sched=bvt</nowiki></code> |
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| Scheduler - see Users' Manual |
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|<code><nowiki>|leveltrigger=</nowiki></code> |
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| Force an IO-APIC-routed IRQ to be level-triggered. Example: 'leveltrigger=4,5,6,20 edgetrigger=21' |
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|<code><nowiki>|edgetrigger=</nowiki></code> |
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| Force an IO-APIC-routed IRQ to be edge-triggered. Example: 'leveltrigger=4,5,6,20 edgetrigger=21' |
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|<code><nowiki>|nmi=</nowiki></code> |
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| One of: <code><nowiki>fatal</nowiki></code>: Xen prints diagnostic message and then hangs. <code><nowiki>dom0</nowiki></code>: The NMI is virtualised to DOM0. <code><nowiki>ignore</nowiki></code>: The NMI error is cleared and ignored. |
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|- |
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|<code><nowiki>|pbd=</nowiki></code> |
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| Name of serial port for Xen pervasive debugger (and enable pdb) |
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|- |
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|<code><nowiki>|conswitch=a</nowiki></code> |
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| A character pair controlling console switching. CTRL+<char1> is used to switch console input between Xen and DOM0. Char 2: If this character is 'x', then do not auto-switch to DOM0 when it boots. Any other value, or omitting the char, enables auto-switch |
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|- |
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|<code><nowiki>|tbuf_size=</nowiki></code> |
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| Trace buffer size (in pages) |
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|<code><nowiki>|xenheap_megabytes=</nowiki></code> |
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| x86-64 only. Size of Xen heap in megabytes, excluding the pfn_info table and allocation bitmap |
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|- |
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|<code><nowiki>|noirqbalance</nowiki></code> |
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| Disable software IRQ balancing and affinity. |
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|<code><nowiki>|apic_verbosity</nowiki></code> |
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| Print more detailed information about local APIC and IOAPIC |
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|<code><nowiki>|lapic</nowiki></code> / <code><nowiki>nolapic</nowiki></code> |
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| Force / Ignore use of local APIC |
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|<code><nowiki>|apic</nowiki></code> |
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| Specify NUMA platform... |
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|<code><nowiki>|noht</nowiki></code> |
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| Disables Hyper-Threading |
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|} |
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=== [[XenLinux]] Boot Options : === |
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''In addition to the standard <u>Linux kernel</u> boot options, we support:'' |
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<span id="xencons"></span> |
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* `xencons=tty' :: Read http://www.cl.cam.ac.uk/research/srg/netos/xen/readmes/user/user.html 's [[XenLinux]] Boot Options |
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[[Category:Xen]] |
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[[Category:Users]] |
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[[Category:Beginners]] |
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[[Category:HowTo]] |
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Latest revision as of 17:22, 5 December 2011
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