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author | Andrew Cooper <andrew.cooper3@citrix.com> | 2012-07-22 16:37:25 +0100 |
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committer | Andrew Cooper <andrew.cooper3@citrix.com> | 2012-07-22 16:37:25 +0100 |
commit | 7fb166219be5790457bc1f9b92371c9114b9cb45 (patch) | |
tree | d55b1471b2bd23951ab01198be0634f3da45b630 /docs | |
parent | 37b3ea68dacdf3f24d523527110d24433383d959 (diff) | |
download | xen-7fb166219be5790457bc1f9b92371c9114b9cb45.tar.gz xen-7fb166219be5790457bc1f9b92371c9114b9cb45.tar.bz2 xen-7fb166219be5790457bc1f9b92371c9114b9cb45.zip |
docs/cmdline: Add some more entries
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'docs')
-rw-r--r-- | docs/misc/xen-command-line.markdown | 102 |
1 files changed, 94 insertions, 8 deletions
diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown index f07892aef2..d49f093593 100644 --- a/docs/misc/xen-command-line.markdown +++ b/docs/misc/xen-command-line.markdown @@ -118,6 +118,12 @@ domain 0 command line ### acpi\_sleep ### allowsuperpage +> `= <boolean>` + +> Default: `true` + +Permit Xen to use superpages when performing memory management. + ### apic > `= summit | bigsmp | default` @@ -128,6 +134,8 @@ there are more than 8 CPUs, Xen will switch to `bigsmp` over ### allow\_unsafe > `= <boolean>` +> Default: `false` + Force boot on potentially unsafe systems. By default Xen will refuse to boot on systems with the following errata: @@ -141,7 +149,20 @@ systems with the following errata: Increase the verbosity of the APIC code from the default value. ### ats +> `= <boolean>` + +> Default: `true` + +Permits Xen to set up and use PCI Address Translation Services, which is required +for PCI Passthrough. + ### availmem +> `= <size>` + +> Default: `0` (no limit) + +Specify a maximum amount of available memory, to which Xen will clamp the e820 table. + ### badpage > `= List of [ <integer> | <integer>-<integer> ]` @@ -151,8 +172,23 @@ that byte `0x12345678` is bad, you would place `badpage=0x12345` on Xen's command line. ### bootscrub +> `= <boolean>` + +> Default: `true` + +Scrub free RAM during boot. This is a safety feature to prevent accidentally leaking +sensitive VM data into other VMs if Xen crashes and reboots. + ### cachesize +> `= <size>` + +If set, override Xen's calculation of the level 2 cache line size. + ### clocksource +> `= pit | hpet | cyclone | acpi` + +If set, override Xen's default choice for the platform timer. + ### com1,com2 > `= <baud>[/<clock_hz>][,DPS[,<io-base>[,<irq>[,<port-bdf>[,<bridge-bdf>]]]] | pci | amt ] ` @@ -249,13 +285,38 @@ including omission, causes Xen to automatically switch to the dom0 console during dom0 boot. ### cpu\_type +> `= arch_perfmon` + +If set, force use of the performance counters for oprofile, rather than detecting +available support. + ### cpufreq -### cpuid\_mask\_cpu -### cpuid\_mask\_ecx -### cpuid\_mask\_edx -### cpuid\_mask\_ext\_ecx -### cpuid\_mask\_ext\_edx -### cpuid\_mask\_xsave\_eax +> `= dom0-kernel | none | xen` + +> Default: `xen` + +Indicate where the responsibility for driving power states lies. + +### cpuid\_mask\_cpu (AMD only) +> `= fam_0f_rev_c | fam_0f_rev_d | fam_0f_rev_e | fam_0f_rev_f | fam_0f_rev_g | fam_10_rev_b | fam_10_rev_c | fam_11_rev_b` + +If the other **cpuid\_mask\_{,ext\_}e{c,d}x** options are fully set (unspecified +on the command line), specify a pre-canned cpuid mask to mask the current +processor down to appear as the specified processor. It is important to ensure +that all hosts in a pool appear the same to guests to allow successful live +migration. + +### cpuid\_mask\_ ecx,edx,ext\_ecx,ext\_edx,xsave_eax +> `= <integer>` + +> Default: `~0` (all bits set) + +These five command line parameters are used to specify cpuid masks to help with +cpuid levelling across a pool of hosts. Setting a bit in the mask indicates that +the feature should be enabled, while clearing a bit in the mask indicates that +the feature should be disabled. It is important to ensure that all hosts in a +pool appear the same to guests to allow successful live migration. + ### cpuidle ### cpuinfo ### crashinfo_maxaddr @@ -485,7 +546,9 @@ Choose the default scheduler. ### serial\_tx\_buffer > `= <size>` -Set the serial transmit buffer size. Defaults to 16kB. +> Default: `16kB` + +Set the serial transmit buffer size. ### smep ### snb\_igd\_quirk @@ -543,7 +606,13 @@ The optional `keep` parameter causes Xen to continue using the vga console even after dom0 has been started. The default behaviour is to relinquish control to dom0. -### vpid +### vpid (Intel) +> `= <boolean>` + +> Default: `true` + +Use Virtual Processor ID support if available. This prevents the need for TLB +flushes on VM entry and exit, increasing performance. ### vpmu > `= ( bts )` @@ -583,5 +652,22 @@ Set the NMI watchdog timeout in seconds. Specifying `0` will turn off the watchdog. ### x2apic +> `= <boolean>` + +> Default: `true` + +Permit use of x2apic setup for SMP environments. + ### x2apic\_phys +> `= <boolean>` + +> Default: `true` + +Use the x2apic physical apic driver. The alternative is the x2apic cluster driver. + ### xsave +> `= <boolean>` + +> Default: `true` + +Permit use of the `xsave/xrstor` instructions. |