From: Michal Novotny <minov...@redhat.com>
These commands return the maximum number of CPUs supported by the
currently running emulator instance, as defined in its QEMUMachine
struct.
Signed-off-by: Michal Novotny <minov...@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com>
---
hmp-commands.hx | 2 ++
hmp.c | 8 ++++++++
hmp.h | 1 +
monitor.c | 7 +++++++
qapi-schema.json | 11 +++++++++++
qmp-commands.hx | 22 ++++++++++++++++++++++
vl.c | 5 +++++
7 files changed, 56 insertions(+)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index df44906..3d98604 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1643,6 +1643,8 @@ show qdev device model list
show roms
@item info tpm
show the TPM device
+@item info cpu_max
+show the number of CPUs supported by the machine being emulated.
@end table
ETEXI
diff --git a/hmp.c b/hmp.c
index d319897..c12c495 100644
--- a/hmp.c
+++ b/hmp.c
@@ -748,6 +748,14 @@ void hmp_ringbuf_read(Monitor *mon, const QDict *qdict)
g_free(data);
}
+void hmp_query_cpu_max(Monitor *mon, const QDict *qdict)
+{
+ int cpu_max;
+
+ cpu_max = qmp_query_cpu_max(NULL);
+ monitor_printf(mon, "Maximum number of CPUs is %d\n", cpu_max);
+}
+
static void hmp_cont_cb(void *opaque, int err)
{
if (!err) {
diff --git a/hmp.h b/hmp.h
index 95fe76e..80e8b41 100644
--- a/hmp.h
+++ b/hmp.h
@@ -42,6 +42,7 @@ void hmp_stop(Monitor *mon, const QDict *qdict);
void hmp_system_reset(Monitor *mon, const QDict *qdict);
void hmp_system_powerdown(Monitor *mon, const QDict *qdict);
void hmp_cpu(Monitor *mon, const QDict *qdict);
+void hmp_query_cpu_max(Monitor *mon, const QDict *qdict);
void hmp_memsave(Monitor *mon, const QDict *qdict);
void hmp_pmemsave(Monitor *mon, const QDict *qdict);
void hmp_ringbuf_write(Monitor *mon, const QDict *qdict);
diff --git a/monitor.c b/monitor.c
index 2d9e887..e450919 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2746,6 +2746,13 @@ static mon_cmd_t info_cmds[] = {
.mhandler.cmd = hmp_info_tpm,
},
{
+ .name = "cpu_max",
+ .args_type = "",
+ .params = "",
+ .help = "Get maximum number of VCPUs supported by machine",
+ .mhandler.cmd = hmp_query_cpu_max,
+ },
+ {
.name = NULL,
},
};
diff --git a/qapi-schema.json b/qapi-schema.json
index 0d16d14..af499bd 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1832,6 +1832,17 @@
{ 'command': 'query-migrate-cache-size', 'returns': 'int' }
##
+## @query-cpu-max
+##
+## query maximum number of CPUs supported by machine
+##
+## Returns: number of CPUs
+##
+## Since: 1.5
+###
+{ 'command': 'query-cpu-max', 'returns': 'int' }
+
+##
# @ObjectPropertyInfo:
#
# @name: the name of the property
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 3aa6bd1..2051fcb 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -385,6 +385,28 @@ Note: CPUs' indexes are obtained with the 'query-cpus'
command.
EQMP
{
+ .name = "query-cpu-max",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_query_cpu_max,
+ },
+
+SQMP
+query-cpu-max
+-------------
+
+Get the maximum CPUs supported by the machine being currently
+emulated.
+
+Returns json-int.
+
+Example:
+
+-> { "execute": "query-cpu-max" }
+<- { "return": 255 }
+
+EQMP
+
+ {
.name = "memsave",
.args_type = "val:l,size:i,filename:s,cpu:i?",
.mhandler.cmd_new = qmp_marshal_input_memsave,
diff --git a/vl.c b/vl.c
index aeed7f4..7643f16 100644
--- a/vl.c
+++ b/vl.c
@@ -662,6 +662,11 @@ StatusInfo *qmp_query_status(Error **errp)
return info;
}
+int64_t qmp_query_cpu_max(Error **errp)
+{
+ return current_machine->max_cpus;
+}
+
/***********************************************************/
/* real time host monotonic timer */
--
1.8.1.4
