[PDF] les territoires ultramarins parmi lesquels les 5 d
[PDF] algorithme tant que suite
[PDF] loi de stefan corps noir
[PDF] puissance rayonnée formule
[PDF] formule rayonnement thermique
[PDF] loi de planck démonstration
[PDF] emissivité corps noir
[PDF] prend la valeur ti 82
[PDF] rayonnement thermique cours
[PDF] corps gris rayonnement
[PDF] rayonnement thermique définition
[PDF] finalité 1 bts am nathan
[PDF] finalité 1 - soutien ? la communication et aux rel
[PDF] finalité 2 bts am
[PDF] f2 bts am
Interfacemanual
Xenv2.0forx86
XenisCopyright(c)2002-2004,TheXenTeam
UniversityofCambridge,UK
suggestionsandcorrectionsarewelcome.
Contents
1Introduction1
2VirtualArchitecture3
3Memory7
4Devices11
5FurtherInformation15
AXenHypercalls17
i ii
Chapter1
Introduction
conventionaloperatingsystem. ofmechanismandpolicywithinthesystem. 1 2
Chapter2
VirtualArchitecture
2.1CPUstate
toring0.
AlistofallhypercallsisgiveninAppendixA.
2.2Exceptions
theset 3
2.3Interruptsandevents
callbacks()hypercall.
2.4Time
oftimeareprovided:
CPUcommunicationlatencies.
haveelapsedsincesystemboot. virtualtimeincreases. cyclecountertime. 4 timerop()hypercall.
2.5XenCPUScheduling
internalschedulerAPI.
2.6Privilegedoperations
5 6
Chapter3
Memory
3.1MemoryAllocation
itslimit.
3.2Pseudo-PhysicalMemory
samewithinXenoranydomain. 7
3.3PageTableUpdates
taneouslybeoftypesPTandRW. 8
OSportingwithlesseffort.
3.4SegmentDescriptorTables
intset gdt(unsignedlong*framelist,intentries) frame useasapage-tablepage,andsoon). have`entries>LAST
RESERVEDGDTENTRY'.Notealsothat,after
registeringtheGDT,slotsFIRST throughLASTRESERVEDGDTENTRY update() hypercall.
3.5StartofDay
inprotectedmodewithpagingenabled. 9 10
Chapter4
Devices
sources: aphysicalinterruptfromarealdevice, avirtualinterrupt(callback)fromXen,or asignalfromanotherdomain agedviatheevent
4.1NetworkI/O
virtualnetworkinterfacesconnectedtoit. 11
4.1.1BackendPacketHandling
backendperformsthesekeyactions: inthecaseofLinux). basicshapingorrate-limitingschemes. containingaSYN. inghavebeencarriedout.
4.1.2DataTransfer
thedomain. ofmemory. priatedomainsafterexaminingtheirheaders. 12 areabletoleavethesystem. thering.
4.2BlockI/O
ration. use.
4.2.1DataTransfer
thebackend. requestsastheynish. 13 14
Chapter5
FurtherInformation
developers'mailinglist(addressbelow).
5.1Otherdocumentation
5.2Onlinereferences
TheofcialXenwebsiteisfoundat:
5.3Mailinglists
Subscribeat:
http://lists.xensource.com/xen-devel questsforhelp.Subscribeat: http://lists.xensource.com/xen-users 15 http://lists.xensource.com/xen-announce -developeroriented.Subscribeat: http://lists.xensource.com/xen-changelog
Ofthese,xen-develisthemostactive.
16
AppendixA
XenHypercalls
describesthecurrentsetofhypercalls.
A.1InvokingHypercalls
Onx86 foundinxen/include/public/xen.h. multicall(void*call list,intnrcalls)
Executeaseriesofhypervisorcalls;nr
callsisthelengthofthearray ofmulticall entrytstructurespointedtobecalllist.Each sizedarguments. 17
A.2VirtualCPUSetup
tonotifytheguestOSofanoccurrence. set unsignedlongfailsafe selector,unsignedlongfailsafeaddress) kernel'sCSforbothevent selectorandfailsafeselector.
Thevalueevent
handlinganddispatchroutine;thefailsafe addressspeciesasep- tousethenormalcallback. usingthefollowinghypercall: set traptable(trapinfot*table) isused.
A.3SchedulingandTimer
sched op(unsignedlongop) 18 pend. virtualprogrammabletimer: set timerop(uint64ttimeout) timeoutvalueasapairof32-bitvalues.
Notethatcallingset
semantics.
A.4PageTableManagement
mmu mittedforprocessinginabatch,withsuccess countbeingupdated toreportthenumberofsuccessfulupdates. requestedasfollows: MMU safe,asdescribedinChapter3. MMU (orbeprivileged). MMU wouldrequirearevalidationofallentries). 19 quiringpageownership;seeSectionA.8. xen/include/public/xen.h. isrecommendedfornewOSports. update unsignedlongags) nrtoval.Aswith mmu update. ofothers: update longval,unsignedlongags,uint16 tdomid)
Identicaltoupdate
vamapping()savethatthepagesbeingmapped mustbelongtothedomaindomid. mappagescontainingI/Odata.
A.5SegmentationSupport
iseffectivelya`safe'versionoflgdt: set gdt(unsignedlong*framelist,intentries) listisanarray xen/include/public/arch-x86
32.h).
20 tasksimplysincelldtrequiresCPL0. torintheGDTorLDT: update longword2) checkstoensurethedescriptorisvalid.
A.6ContextSwitching
1)stackpointer:
stack switch(unsignedlongss,unsignedlongesp) ment,whichespisthenewstackpointer. pointstate: fpu taskswitch(void)quotesdbs_dbs4.pdfusesText_8
Interface manual - Xen