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Xen 3.0 Virtualization Interface Guide
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A.10 Administrative Operations

A large number of control operations are available to a sufficiently privileged domain (typically domain 0). These allow the creation and management of new domains, for example. A complete list is given below: for more details on any or all of these, please see xen/include/public/dom0_ops.h


dom0_op(dom0_op_t *op)

Administrative domain operations for domain management. The options are:

DOM0_GETMEMLIST:
get list of pages used by the domain

DOM0_SCHEDCTL:

DOM0_ADJUSTDOM:
adjust scheduling priorities for domain

DOM0_CREATEDOMAIN:
create a new domain

DOM0_DESTROYDOMAIN:
deallocate all resources associated with a domain

DOM0_PAUSEDOMAIN:
remove a domain from the scheduler run queue.

DOM0_UNPAUSEDOMAIN:
mark a paused domain as schedulable once again.

DOM0_GETDOMAININFO:
get statistics about the domain

DOM0_SETDOMAININFO:
set VCPU-related attributes

DOM0_MSR:
read or write model specific registers

DOM0_DEBUG:
interactively invoke the debugger

DOM0_SETTIME:
set system time

DOM0_GETPAGEFRAMEINFO:

DOM0_READCONSOLE:
read console content from hypervisor buffer ring

DOM0_PINCPUDOMAIN:
pin domain to a particular CPU

DOM0_TBUFCONTROL:
get and set trace buffer attributes

DOM0_PHYSINFO:
get information about the host machine

DOM0_SCHED_ID:
get the ID of the current Xen scheduler

DOM0_SHADOW_CONTROL:
switch between shadow page-table modes

DOM0_SETDOMAINMAXMEM:
set maximum memory allocation of a domain

DOM0_GETPAGEFRAMEINFO2:
batched interface for getting page frame info

DOM0_ADD_MEMTYPE:
set MTRRs

DOM0_DEL_MEMTYPE:
remove a memory type range

DOM0_READ_MEMTYPE:
read MTRR

DOM0_PERFCCONTROL:
control Xen's software performance counters

DOM0_MICROCODE:
update CPU microcode

DOM0_IOPORT_PERMISSION:
modify domain permissions for an IO port range (enable / disable a range for a particular domain)

DOM0_GETVCPUCONTEXT:
get context from a VCPU

DOM0_GETVCPUINFO:
get current state for a VCPU
DOM0_GETDOMAININFOLIST:
batched interface to get domain info

DOM0_PLATFORM_QUIRK:
inform Xen of a platform quirk it needs to handle (e.g. noirqbalance)

DOM0_PHYSICAL_MEMORY_MAP:
get info about dom0's memory map

DOM0_MAX_VCPUS:
change max number of VCPUs for a domain

DOM0_SETDOMAINHANDLE:
set the handle for a domain

Most of the above are best understood by looking at the code implementing them (in xen/common/dom0_ops.c) and in the user-space tools that use them (mostly in tools/libxc).

Hypercalls relating to the management of the Access Control Module are also restricted to domain 0 access for now:


acm_op(struct acm_op * u_acm_op)

This hypercall can be used to configure the state of the ACM, query that state, request access control decisions and dump additional information.

Xen 3.0 Virtualization Interface Guide
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  Published under the terms of the GNU General Public License Design by Interspire