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qemu: Make monitor aware of CPU clusters

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This makes it so libvirt can obtain accurate information about
guest CPUs from QEMU, and should make it possible to correctly
perform operations such as CPU hotplug.

Of course this is mostly moot at the moment: only aarch64 can use
CPU clusters, and CPU hotplug is not yet implemented on that
architecture.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Andrea Bolognani 2024-01-05 18:51:29 +01:00
parent 82c9196bfa
commit 763381df53
4 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/qemu/qemu_domain.c
View File

@ -9900,11 +9900,12 @@ qemuDomainRefreshVcpuInfo(virDomainObj *vm,
if (validTIDs)
VIR_DEBUG("vCPU[%zu] PID %llu is valid "
"(node=%d socket=%d die=%d core=%d thread=%d)",
"(node=%d socket=%d die=%d cluster=%d core=%d thread=%d)",
i, (unsigned long long)info[i].tid,
info[i].node_id,
info[i].socket_id,
info[i].die_id,
info[i].cluster_id,
info[i].core_id,
info[i].thread_id);
}

2
src/qemu/qemu_monitor.c
View File

@ -1501,6 +1501,7 @@ qemuMonitorCPUInfoClear(qemuMonitorCPUInfo *cpus,
cpus[i].qemu_id = -1;
cpus[i].socket_id = -1;
cpus[i].die_id = -1;
cpus[i].cluster_id = -1;
cpus[i].core_id = -1;
cpus[i].thread_id = -1;
cpus[i].node_id = -1;
@ -1658,6 +1659,7 @@ qemuMonitorGetCPUInfoHotplug(struct qemuMonitorQueryHotpluggableCpusEntry *hotpl
!vcpus[mainvcpu].online;
vcpus[mainvcpu].socket_id = hotplugvcpus[i].socket_id;
vcpus[mainvcpu].die_id = hotplugvcpus[i].die_id;
vcpus[mainvcpu].cluster_id = hotplugvcpus[i].cluster_id;
vcpus[mainvcpu].core_id = hotplugvcpus[i].core_id;
vcpus[mainvcpu].thread_id = hotplugvcpus[i].thread_id;
vcpus[mainvcpu].node_id = hotplugvcpus[i].node_id;

2
src/qemu/qemu_monitor.h
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@ -590,6 +590,7 @@ struct qemuMonitorQueryHotpluggableCpusEntry {
int node_id;
int socket_id;
int die_id;
int cluster_id;
int core_id;
int thread_id;
@ -613,6 +614,7 @@ struct _qemuMonitorCPUInfo {
* all entries are -1 */
int socket_id;
int die_id;
int cluster_id;
int core_id;
int thread_id;
int node_id;

5
src/qemu/qemu_monitor_json.c
View File

@ -7579,12 +7579,14 @@ qemuMonitorJSONProcessHotpluggableCpusReply(virJSONValue *vcpu,
entry->node_id = -1;
entry->socket_id = -1;
entry->die_id = -1;
entry->cluster_id = -1;
entry->core_id = -1;
entry->thread_id = -1;
ignore_value(virJSONValueObjectGetNumberInt(props, "node-id", &entry->node_id));
ignore_value(virJSONValueObjectGetNumberInt(props, "socket-id", &entry->socket_id));
ignore_value(virJSONValueObjectGetNumberInt(props, "die-id", &entry->die_id));
ignore_value(virJSONValueObjectGetNumberInt(props, "cluster-id", &entry->cluster_id));
ignore_value(virJSONValueObjectGetNumberInt(props, "core-id", &entry->core_id));
ignore_value(virJSONValueObjectGetNumberInt(props, "thread-id", &entry->thread_id));
@ -7622,6 +7624,9 @@ qemuMonitorQueryHotpluggableCpusEntrySort(const void *p1,
if (a->die_id != b->die_id)
return a->die_id - b->die_id;
if (a->cluster_id != b->cluster_id)
return a->cluster_id - b->cluster_id;
if (a->core_id != b->core_id)
return a->core_id - b->core_id;