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qmp: add set-numa-node command 

Command is allowed to run only in preconfig stage and
will allow to configure numa mapping for CPUs depending
on possible CPUs layout (query-hotpluggable-cpus) for
given machine instance.

Example of configuration session:
$QEMU -smp 2 --preconfig ...

QMP:
-> {'execute': 'query-hotpluggable-cpus' }
<- {'return': [
       {'props': {'core-id': 0, 'thread-id': 0, 'socket-id': 1}, ... },
       {'props': {'core-id': 0, 'thread-id': 0, 'socket-id': 0}, ... }
   ]}

-> {'execute': 'set-numa-node', 'arguments': { 'type': 'node', 'nodeid': 0 } }
<- {'return': {}}
-> {'execute': 'set-numa-node', 'arguments': { 'type': 'cpu',
       'node-id': 0, 'core-id': 0, 'thread-id': 0, 'socket-id': 1, }
   }
<- {'return': {}}

-> {'execute': 'set-numa-node', 'arguments': { 'type': 'node', 'nodeid': 1 } }
-> {'execute': 'set-numa-node', 'arguments': { 'type': 'cpu',
       'node-id': 1, 'core-id': 0, 'thread-id': 0, 'socket-id': 0 }
   }
<- {'return': {}}

-> {'execute': 'query-hotpluggable-cpus' }
<- {'return': [
       {'props': {'core-id': 0, 'thread-id': 0, 'node-id': 0, 'socket-id': 1}, ... },
       {'props': {'core-id': 0, 'thread-id': 0, 'node-id': 1, 'socket-id': 0}, ... }
   ]}

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1525423069-61903-11-git-send-email-imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
[ehabkost: Changed "since 2.13" to "since 3.0"]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2018-05-04 10:37:48 +02:00 committed by Eduardo Habkost
parent 899eaab464
commit f3be67812c
2 changed files with 25 additions and 0 deletions
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11
numa.c
View File

@ -444,6 +444,17 @@ void parse_numa_opts(MachineState *ms)
}
}
void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
{
if (!runstate_check(RUN_STATE_PRECONFIG)) {
error_setg(errp, "The command is permitted only in '%s' state",
RunState_str(RUN_STATE_PRECONFIG));
return;
}
set_numa_options(MACHINE(qdev_get_machine()), cmd, errp);
}
void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
{
int node_id = object_property_get_int(OBJECT(dev), "node-id", &error_abort);

14
qapi/misc.json
View File

@ -3510,3 +3510,17 @@
##
{ 'command': 'x-oob-test', 'data' : { 'lock': 'bool' },
'allow-oob': true }
##
# @set-numa-node:
#
# Runtime equivalent of '-numa' CLI option, available at
# preconfigure stage to configure numa mapping before initializing
# machine.
#
# Since 3.0
##
{ 'command': 'set-numa-node', 'boxed': true,
'data': 'NumaOptions',
'allow-preconfig': true
}