Hi All, I have just added support for getting/setting number of cpus in VirtualBox. The patch for the same is include below. Regards, Pritesh

commit 3dcaf67d0bb4aa58c4e2224779bebcf2263068b8 Author: Pritesh Kothari <Pritesh.Kothari(a)Sun.com&gt; Date: Fri Aug 7 15:49:16 2009 +0200 libvirt: support for getting/setting number of cpus diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c index d3158ef..32bfb4d 100644 --- a/src/vbox/vbox_tmpl.c +++ b/src/vbox/vbox_tmpl.c @@ -1527,6 +1527,82 @@ cleanup: return ret; } +static int vboxDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus) { + nsresult rc; + vboxGlobalData *data = dom->conn->privateData; + IMachine *machine = NULL; + vboxIID *iid = NULL; + PRUint32 CPUCount = nvcpus; + int ret = -1; + +#if VBOX_API_VERSION == 2002 + if (VIR_ALLOC(iid) < 0) { + virReportOOMError(dom->conn); + goto cleanup; + } +#endif + + if(data->vboxObj) { + + vboxIIDFromUUID(dom->uuid, iid); + + rc = data->vboxObj->vtbl->OpenSession(data->vboxObj, data->vboxSession, iid); + if (NS_SUCCEEDED(rc)) { + data->vboxSession->vtbl->GetMachine(data->vboxSession, &machine); + if (machine) { + rc = machine->vtbl->SetCPUCount(machine, CPUCount); + if (NS_SUCCEEDED(rc)) { + machine->vtbl->SaveSettings(machine); + ret = 0; + } else { + vboxError(dom->conn, VIR_ERR_INTERNAL_ERROR, "%s: %u, rc=%08x", + "could not set the number of cpus of the domain to", + CPUCount, (unsigned)rc); + } + machine->vtbl->nsisupports.Release((nsISupports *)machine); + } else { + vboxError(dom->conn, VIR_ERR_INVALID_DOMAIN, + "no domain with matching id %d", dom->id); + } + } else { + vboxError(dom->conn, VIR_ERR_INVALID_DOMAIN, + "can't open session to the domain with id %d", dom->id); + } + data->vboxSession->vtbl->Close(data->vboxSession); + } + +#if VBOX_API_VERSION == 2002 +cleanup: +#endif + vboxIIDFree(iid); + return ret; +} + +static int vboxDomainGetMaxVcpus(virDomainPtr dom) { + vboxGlobalData *data = dom->conn->privateData; + PRUint32 maxCPUCount = 0; + int ret = -1; + + /* Currently every domain supports the same number of max cpus + * as that supported by vbox and thus take it directly from + * the systemproperties. + */ + if(data->vboxObj) { + ISystemProperties *systemProperties = NULL; + + data->vboxObj->vtbl->GetSystemProperties(data->vboxObj, &systemProperties); + if (systemProperties) { + systemProperties->vtbl->GetMaxGuestCPUCount(systemProperties, &maxCPUCount); + systemProperties->vtbl->nsisupports.Release((nsISupports *)systemProperties); + } + } + + if (maxCPUCount > 0) + ret = maxCPUCount; + + return ret; +} + static char *vboxDomainDumpXML(virDomainPtr dom, int flags) { nsresult rc; vboxGlobalData *data = dom->conn->privateData; @@ -5579,10 +5655,10 @@ virDriver NAME(Driver) = { vboxDomainSave, /* domainSave */ NULL, /* domainRestore */ NULL, /* domainCoreDump */ - NULL, /* domainSetVcpus */ + vboxDomainSetVcpus, /* domainSetVcpus */ NULL, /* domainPinVcpu */ NULL, /* domainGetVcpus */ - NULL, /* domainGetMaxVcpus */ + vboxDomainGetMaxVcpus, /* domainGetMaxVcpus */ NULL, /* domainGetSecurityLabel */ NULL, /* nodeGetSecurityModel */ vboxDomainDumpXML, /* domainDumpXML */