/**
* virCPUGetHost:
*
* @arch: CPU architecture
* @type: requested type of the CPU
* @nodeInfo: simplified CPU topology (optional)
* @models: list of CPU models that can be considered for host CPU
*
* Create CPU definition describing the host's CPU.
*
* The @type (either VIR_CPU_TYPE_HOST or VIR_CPU_TYPE_GUEST) specifies what
* type of CPU definition should be created. Specifically, VIR_CPU_TYPE_HOST
* CPUs may contain only features without any policy attribute. Requesting
* VIR_CPU_TYPE_GUEST provides better results because the CPU is allowed to
* contain disabled features.
*
* If @nodeInfo is not NULL (which is only allowed for VIR_CPU_TYPE_HOST CPUs),
* the CPU definition will have topology (sockets, cores, threads) filled in
* according to the content of @nodeInfo. The function fails only if @nodeInfo
* was not passed in and the assigned CPU driver was not able to detect the
* host CPU model. In other words, a CPU definition containing just the
* topology is a successful result even if detecting the host CPU model fails.
*
* It possible to limit the CPU model which may appear in the created CPU
* definition by passing non-NULL @models list. This is useful when requesting
* a CPU model usable on a specific hypervisor. If @models is NULL, any CPU
* model known to libvirt may appear in the result.
*
* Returns host CPU definition or NULL on error.
*/
virCPUDefPtr
virCPUGetHost(virArch arch,
virCPUType type,
virNodeInfoPtr nodeInfo,
virDomainCapsCPUModelsPtr models)
{
struct cpuArchDriver *driver;
virCPUDefPtr cpu = NULL;
VIR_DEBUG("arch=%s, type=%s, nodeInfo=%p, models=%p",
virArchToString(arch), virCPUTypeToString(type), nodeInfo,
models);
if (!(driver = cpuGetSubDriver(arch)))
return NULL;
if (VIR_ALLOC(cpu) < 0)
return NULL;
switch (type) {
case VIR_CPU_TYPE_HOST:
cpu->arch = arch;
cpu->type = type;
break;
case VIR_CPU_TYPE_GUEST:
if (nodeInfo) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot set topology for CPU type '%s'"),
virCPUTypeToString(type));
goto error;
}
cpu->type = type;
break;
case VIR_CPU_TYPE_AUTO:
case VIR_CPU_TYPE_LAST:
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported CPU type: %s"),
virCPUTypeToString(type));
goto error;
}
if (nodeInfo) {
cpu->sockets = nodeInfo->sockets;
cpu->cores = nodeInfo->cores;
cpu->threads = nodeInfo->threads;
}
/* Try to get the host CPU model, but don't really fail if nodeInfo is
* filled in.
*/
if (driver->getHost) {
if (driver->getHost(cpu, models) < 0 &&
!nodeInfo)
goto error;
} else if (nodeInfo) {
VIR_DEBUG("cannot detect host CPU model for %s architecture",
virArchToString(arch));
} else {
virReportError(VIR_ERR_NO_SUPPORT,
_("cannot detect host CPU model for %s architecture"),
virArchToString(arch));
goto error;
}
return cpu;
error:
virCPUDefFree(cpu);
return NULL;
}
bool
virCPUDefIsEqual(virCPUDefPtr src,
virCPUDefPtr dst)
{
bool identical = false;
int i;
if (!src && !dst)
return true;
if ((src && !dst) || (!src && dst)) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Target CPU does not match source"));
goto cleanup;
}
if (src->type != dst->type) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU type %s does not match source %s"),
virCPUTypeToString(dst->type),
virCPUTypeToString(src->type));
goto cleanup;
}
if (src->mode != dst->mode) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU mode %s does not match source %s"),
virCPUModeTypeToString(dst->mode),
virCPUModeTypeToString(src->mode));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->arch, dst->arch)) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU arch %s does not match source %s"),
NULLSTR(dst->arch), NULLSTR(src->arch));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->model, dst->model)) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU model %s does not match source %s"),
NULLSTR(dst->model), NULLSTR(src->model));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->vendor, dst->vendor)) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU vendor %s does not match source %s"),
NULLSTR(dst->vendor), NULLSTR(src->vendor));
goto cleanup;
}
if (src->sockets != dst->sockets) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU sockets %d does not match source %d"),
dst->sockets, src->sockets);
goto cleanup;
}
if (src->cores != dst->cores) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU cores %d does not match source %d"),
dst->cores, src->cores);
goto cleanup;
}
if (src->threads != dst->threads) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU threads %d does not match source %d"),
dst->threads, src->threads);
goto cleanup;
}
if (src->nfeatures != dst->nfeatures) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU feature count %zu does not match source %zu"),
dst->nfeatures, src->nfeatures);
goto cleanup;
}
for (i = 0 ; i < src->nfeatures ; i++) {
if (STRNEQ(src->features[i].name, dst->features[i].name)) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU feature %s does not match source %s"),
dst->features[i].name, src->features[i].name);
goto cleanup;
}
if (src->features[i].policy != dst->features[i].policy) {
virCPUReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Target CPU feature policy %s does not match source %s"),
virCPUFeaturePolicyTypeToString(dst->features[i].policy),
virCPUFeaturePolicyTypeToString(src->features[i].policy));
goto cleanup;
}
}
identical = true;
cleanup:
return identical;
}
bool
virCPUDefIsEqual(virCPUDefPtr src,
virCPUDefPtr dst,
bool reportError)
{
bool identical = false;
size_t i;
if (!src && !dst)
return true;
#define MISMATCH(fmt, ...) \
if (reportError) \
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, fmt, __VA_ARGS__)
if ((src && !dst) || (!src && dst)) {
MISMATCH("%s", _("Target CPU does not match source"));
goto cleanup;
}
if (src->type != dst->type) {
MISMATCH(_("Target CPU type %s does not match source %s"),
virCPUTypeToString(dst->type),
virCPUTypeToString(src->type));
goto cleanup;
}
if (src->mode != dst->mode) {
MISMATCH(_("Target CPU mode %s does not match source %s"),
virCPUModeTypeToString(dst->mode),
virCPUModeTypeToString(src->mode));
goto cleanup;
}
if (src->check != dst->check) {
MISMATCH(_("Target CPU check %s does not match source %s"),
virCPUCheckTypeToString(dst->check),
virCPUCheckTypeToString(src->check));
goto cleanup;
}
if (src->arch != dst->arch) {
MISMATCH(_("Target CPU arch %s does not match source %s"),
virArchToString(dst->arch),
virArchToString(src->arch));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->model, dst->model)) {
MISMATCH(_("Target CPU model %s does not match source %s"),
NULLSTR(dst->model), NULLSTR(src->model));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->vendor, dst->vendor)) {
MISMATCH(_("Target CPU vendor %s does not match source %s"),
NULLSTR(dst->vendor), NULLSTR(src->vendor));
goto cleanup;
}
if (STRNEQ_NULLABLE(src->vendor_id, dst->vendor_id)) {
MISMATCH(_("Target CPU vendor id %s does not match source %s"),
NULLSTR(dst->vendor_id), NULLSTR(src->vendor_id));
goto cleanup;
}
if (src->sockets != dst->sockets) {
MISMATCH(_("Target CPU sockets %d does not match source %d"),
dst->sockets, src->sockets);
goto cleanup;
}
if (src->cores != dst->cores) {
MISMATCH(_("Target CPU cores %d does not match source %d"),
dst->cores, src->cores);
goto cleanup;
}
if (src->threads != dst->threads) {
MISMATCH(_("Target CPU threads %d does not match source %d"),
dst->threads, src->threads);
goto cleanup;
}
if (src->nfeatures != dst->nfeatures) {
MISMATCH(_("Target CPU feature count %zu does not match source %zu"),
dst->nfeatures, src->nfeatures);
goto cleanup;
}
for (i = 0; i < src->nfeatures; i++) {
if (STRNEQ(src->features[i].name, dst->features[i].name)) {
MISMATCH(_("Target CPU feature %s does not match source %s"),
dst->features[i].name, src->features[i].name);
goto cleanup;
}
if (src->features[i].policy != dst->features[i].policy) {
MISMATCH(_("Target CPU feature policy %s does not match source %s"),
virCPUFeaturePolicyTypeToString(dst->features[i].policy),
virCPUFeaturePolicyTypeToString(src->features[i].policy));
goto cleanup;
}
}
if ((src->cache && !dst->cache) ||
(!src->cache && dst->cache) ||
(src->cache && dst->cache &&
(src->cache->level != dst->cache->level ||
src->cache->mode != dst->cache->mode))) {
MISMATCH("%s", _("Target CPU cache does not match source"));
goto cleanup;
}
#undef MISMATCH
identical = true;
cleanup:
return identical;
}
