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f7dd3a4e62
The mode can be either of "custom" (default), "host-model",
"host-passthrough". The semantics of each mode is described in the
following examples:
- guest CPU is a default model with specified topology:
<cpu>
<topology sockets='1' cores='2' threads='1'/>
</cpu>
- guest CPU matches selected model:
<cpu mode='custom' match='exact'>
<model>core2duo</model>
</cpu>
- guest CPU should be a copy of host CPU as advertised by capabilities
XML (this is a short cut for manually copying host CPU specification
from capabilities to domain XML):
<cpu mode='host-model'/>
In case a hypervisor does not support the exact host model, libvirt
automatically falls back to a closest supported CPU model and
removes/adds features to match host. This behavior can be disabled by
<cpu mode='host-model'>
<model fallback='forbid'/>
</cpu>
- the same as previous returned by virDomainGetXMLDesc with
VIR_DOMAIN_XML_UPDATE_CPU flag:
<cpu mode='host-model' match='exact'>
<model fallback='allow'>Penryn</model> --+
<vendor>Intel</vendor> |
<topology sockets='2' cores='4' threads='1'/> + copied from
<feature policy='require' name='dca'/> | capabilities XML
<feature policy='require' name='xtpr'/> |
... --+
</cpu>
- guest CPU should be exactly the same as host CPU even in the aspects
libvirt doesn't model (such domain cannot be migrated unless both
hosts contain exactly the same CPUs):
<cpu mode='host-passthrough'/>
- the same as previous returned by virDomainGetXMLDesc with
VIR_DOMAIN_XML_UPDATE_CPU flag:
<cpu mode='host-passthrough' match='minimal'>
<model>Penryn</model> --+ copied from caps
<vendor>Intel</vendor> | XML but doesn't
<topology sockets='2' cores='4' threads='1'/> | describe all
<feature policy='require' name='dca'/> | aspects of the
<feature policy='require' name='xtpr'/> | actual guest CPU
... --+
</cpu>
227 lines
6.9 KiB
C
227 lines
6.9 KiB
C
#include <config.h>
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#ifdef WITH_QEMU
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# include <stdlib.h>
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# include "testutilsqemu.h"
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# include "testutils.h"
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# include "memory.h"
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# include "cpu_conf.h"
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# include "qemu/qemu_driver.h"
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# include "qemu/qemu_domain.h"
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static virCapsGuestMachinePtr *testQemuAllocMachines(int *nmachines)
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{
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virCapsGuestMachinePtr *machines;
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static const char *const x86_machines[] = {
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"pc", "isapc"
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};
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machines = virCapabilitiesAllocMachines(x86_machines,
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ARRAY_CARDINALITY(x86_machines));
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if (machines == NULL)
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return NULL;
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*nmachines = ARRAY_CARDINALITY(x86_machines);
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return machines;
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}
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/* Newer versions of qemu have versioned machine types to allow
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* compatibility with older releases.
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* The 'pc' machine type is an alias of the newest machine type.
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*/
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static virCapsGuestMachinePtr *testQemuAllocNewerMachines(int *nmachines)
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{
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virCapsGuestMachinePtr *machines;
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char *canonical;
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static const char *const x86_machines[] = {
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"pc-0.11", "pc", "pc-0.10", "isapc"
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};
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if ((canonical = strdup(x86_machines[0])) == NULL)
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return NULL;
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machines = virCapabilitiesAllocMachines(x86_machines,
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ARRAY_CARDINALITY(x86_machines));
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if (machines == NULL) {
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VIR_FREE(canonical);
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return NULL;
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}
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machines[1]->canonical = canonical;
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*nmachines = ARRAY_CARDINALITY(x86_machines);
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return machines;
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}
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static int testQemuDefaultConsoleType(const char *ostype ATTRIBUTE_UNUSED)
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{
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return VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL;
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}
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static int testQemuAddPPC64Guest(virCapsPtr caps)
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{
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static const char *machine[] = { "pseries" };
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virCapsGuestMachinePtr *machines = NULL;
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virCapsGuestPtr guest;
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machines = virCapabilitiesAllocMachines(machine, 1);
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if (!machines)
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goto error;
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guest = virCapabilitiesAddGuest(caps, "hvm", "ppc64", 64,
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"/usr/bin/qemu-system-ppc64", NULL,
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1, machines);
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if (!guest)
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goto error;
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if (!virCapabilitiesAddGuestDomain(guest, "qemu", NULL, NULL, 0, NULL))
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goto error;
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return 0;
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error:
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/* No way to free a guest? */
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virCapabilitiesFreeMachines(machines, 1);
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return -1;
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}
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virCapsPtr testQemuCapsInit(void) {
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virCapsPtr caps;
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virCapsGuestPtr guest;
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virCapsGuestMachinePtr *machines = NULL;
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int nmachines = 0;
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static const char *const xen_machines[] = {
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"xenner"
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};
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static virCPUFeatureDef host_cpu_features[] = {
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{ (char *) "lahf_lm", -1 },
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{ (char *) "xtpr", -1 },
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{ (char *) "cx16", -1 },
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{ (char *) "tm2", -1 },
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{ (char *) "est", -1 },
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{ (char *) "vmx", -1 },
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{ (char *) "ds_cpl", -1 },
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{ (char *) "pbe", -1 },
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{ (char *) "tm", -1 },
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{ (char *) "ht", -1 },
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{ (char *) "ss", -1 },
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{ (char *) "acpi", -1 },
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{ (char *) "ds", -1 }
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};
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static virCPUDef host_cpu = {
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VIR_CPU_TYPE_HOST, /* type */
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0, /* mode */
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0, /* match */
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(char *) "x86_64", /* arch */
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(char *) "core2duo", /* model */
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0, /* fallback */
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(char *) "Intel", /* vendor */
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1, /* sockets */
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2, /* cores */
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1, /* threads */
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ARRAY_CARDINALITY(host_cpu_features), /* nfeatures */
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ARRAY_CARDINALITY(host_cpu_features), /* nfeatures_max */
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host_cpu_features /* features */
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};
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if ((caps = virCapabilitiesNew(host_cpu.arch,
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0, 0)) == NULL)
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return NULL;
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caps->defaultConsoleTargetType = testQemuDefaultConsoleType;
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if ((caps->host.cpu = virCPUDefCopy(&host_cpu)) == NULL ||
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(machines = testQemuAllocMachines(&nmachines)) == NULL)
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goto cleanup;
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qemuDomainSetNamespaceHooks(caps);
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if ((guest = virCapabilitiesAddGuest(caps, "hvm", "i686", 32,
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"/usr/bin/qemu", NULL,
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nmachines, machines)) == NULL ||
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!virCapabilitiesAddGuestFeature(guest, "cpuselection", 1, 0))
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goto cleanup;
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machines = NULL;
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if (virCapabilitiesAddGuestDomain(guest,
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"qemu",
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NULL,
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NULL,
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0,
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NULL) == NULL)
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goto cleanup;
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if ((machines = testQemuAllocNewerMachines(&nmachines)) == NULL)
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goto cleanup;
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if ((guest = virCapabilitiesAddGuest(caps, "hvm", "x86_64", 64,
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"/usr/bin/qemu-system-x86_64", NULL,
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nmachines, machines)) == NULL ||
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!virCapabilitiesAddGuestFeature(guest, "cpuselection", 1, 0))
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goto cleanup;
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machines = NULL;
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if (virCapabilitiesAddGuestDomain(guest,
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"qemu",
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NULL,
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NULL,
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0,
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NULL) == NULL)
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goto cleanup;
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if ((machines = testQemuAllocMachines(&nmachines)) == NULL)
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goto cleanup;
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if (virCapabilitiesAddGuestDomain(guest,
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"kvm",
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"/usr/bin/kvm",
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NULL,
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nmachines,
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machines) == NULL)
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goto cleanup;
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machines = NULL;
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nmachines = ARRAY_CARDINALITY(xen_machines);
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if ((machines = virCapabilitiesAllocMachines(xen_machines, nmachines)) == NULL)
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goto cleanup;
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if ((guest = virCapabilitiesAddGuest(caps, "xen", "x86_64", 64,
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"/usr/bin/xenner", NULL,
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nmachines, machines)) == NULL)
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goto cleanup;
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machines = NULL;
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if (virCapabilitiesAddGuestDomain(guest,
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"kvm",
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"/usr/bin/kvm",
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NULL,
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0,
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NULL) == NULL)
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goto cleanup;
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if (testQemuAddPPC64Guest(caps))
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goto cleanup;
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if (virTestGetDebug()) {
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char *caps_str;
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caps_str = virCapabilitiesFormatXML(caps);
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if (!caps_str)
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goto cleanup;
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fprintf(stderr, "QEMU driver capabilities:\n%s", caps_str);
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VIR_FREE(caps_str);
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}
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return caps;
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cleanup:
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virCapabilitiesFreeMachines(machines, nmachines);
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virCapabilitiesFree(caps);
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return NULL;
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}
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#endif
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