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-rw-r--r--hw/core/machine-smp.c26
-rw-r--r--hw/core/machine.c3
-rw-r--r--include/hw/boards.h6
-rw-r--r--qapi/machine.json5
-rw-r--r--qemu-options.hx7
-rw-r--r--softmmu/vl.c3
6 files changed, 38 insertions, 12 deletions
diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c
index 2cbfd57429..b39ed21e65 100644
--- a/hw/core/machine-smp.c
+++ b/hw/core/machine-smp.c
@@ -37,6 +37,10 @@ static char *cpu_hierarchy_to_string(MachineState *ms)
g_string_append_printf(s, " * dies (%u)", ms->smp.dies);
}
+ if (mc->smp_props.clusters_supported) {
+ g_string_append_printf(s, " * clusters (%u)", ms->smp.clusters);
+ }
+
g_string_append_printf(s, " * cores (%u)", ms->smp.cores);
g_string_append_printf(s, " * threads (%u)", ms->smp.threads);
@@ -71,6 +75,7 @@ void machine_parse_smp_config(MachineState *ms,
unsigned cpus = config->has_cpus ? config->cpus : 0;
unsigned sockets = config->has_sockets ? config->sockets : 0;
unsigned dies = config->has_dies ? config->dies : 0;
+ unsigned clusters = config->has_clusters ? config->clusters : 0;
unsigned cores = config->has_cores ? config->cores : 0;
unsigned threads = config->has_threads ? config->threads : 0;
unsigned maxcpus = config->has_maxcpus ? config->maxcpus : 0;
@@ -82,6 +87,7 @@ void machine_parse_smp_config(MachineState *ms,
if ((config->has_cpus && config->cpus == 0) ||
(config->has_sockets && config->sockets == 0) ||
(config->has_dies && config->dies == 0) ||
+ (config->has_clusters && config->clusters == 0) ||
(config->has_cores && config->cores == 0) ||
(config->has_threads && config->threads == 0) ||
(config->has_maxcpus && config->maxcpus == 0)) {
@@ -97,8 +103,13 @@ void machine_parse_smp_config(MachineState *ms,
error_setg(errp, "dies not supported by this machine's CPU topology");
return;
}
+ if (!mc->smp_props.clusters_supported && clusters > 1) {
+ error_setg(errp, "clusters not supported by this machine's CPU topology");
+ return;
+ }
dies = dies > 0 ? dies : 1;
+ clusters = clusters > 0 ? clusters : 1;
/* compute missing values based on the provided ones */
if (cpus == 0 && maxcpus == 0) {
@@ -113,41 +124,42 @@ void machine_parse_smp_config(MachineState *ms,
if (sockets == 0) {
cores = cores > 0 ? cores : 1;
threads = threads > 0 ? threads : 1;
- sockets = maxcpus / (dies * cores * threads);
+ sockets = maxcpus / (dies * clusters * cores * threads);
} else if (cores == 0) {
threads = threads > 0 ? threads : 1;
- cores = maxcpus / (sockets * dies * threads);
+ cores = maxcpus / (sockets * dies * clusters * threads);
}
} else {
/* prefer cores over sockets since 6.2 */
if (cores == 0) {
sockets = sockets > 0 ? sockets : 1;
threads = threads > 0 ? threads : 1;
- cores = maxcpus / (sockets * dies * threads);
+ cores = maxcpus / (sockets * dies * clusters * threads);
} else if (sockets == 0) {
threads = threads > 0 ? threads : 1;
- sockets = maxcpus / (dies * cores * threads);
+ sockets = maxcpus / (dies * clusters * cores * threads);
}
}
/* try to calculate omitted threads at last */
if (threads == 0) {
- threads = maxcpus / (sockets * dies * cores);
+ threads = maxcpus / (sockets * dies * clusters * cores);
}
}
- maxcpus = maxcpus > 0 ? maxcpus : sockets * dies * cores * threads;
+ maxcpus = maxcpus > 0 ? maxcpus : sockets * dies * clusters * cores * threads;
cpus = cpus > 0 ? cpus : maxcpus;
ms->smp.cpus = cpus;
ms->smp.sockets = sockets;
ms->smp.dies = dies;
+ ms->smp.clusters = clusters;
ms->smp.cores = cores;
ms->smp.threads = threads;
ms->smp.max_cpus = maxcpus;
/* sanity-check of the computed topology */
- if (sockets * dies * cores * threads != maxcpus) {
+ if (sockets * dies * clusters * cores * threads != maxcpus) {
g_autofree char *topo_msg = cpu_hierarchy_to_string(ms);
error_setg(errp, "Invalid CPU topology: "
"product of the hierarchy must match maxcpus: "
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 3993c534b9..a4a2df405f 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -742,10 +742,12 @@ static void machine_get_smp(Object *obj, Visitor *v, const char *name,
.has_cpus = true, .cpus = ms->smp.cpus,
.has_sockets = true, .sockets = ms->smp.sockets,
.has_dies = true, .dies = ms->smp.dies,
+ .has_clusters = true, .clusters = ms->smp.clusters,
.has_cores = true, .cores = ms->smp.cores,
.has_threads = true, .threads = ms->smp.threads,
.has_maxcpus = true, .maxcpus = ms->smp.max_cpus,
};
+
if (!visit_type_SMPConfiguration(v, name, &config, &error_abort)) {
return;
}
@@ -932,6 +934,7 @@ static void machine_initfn(Object *obj)
ms->smp.max_cpus = mc->default_cpus;
ms->smp.sockets = 1;
ms->smp.dies = 1;
+ ms->smp.clusters = 1;
ms->smp.cores = 1;
ms->smp.threads = 1;
}
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 7597cec440..f49a2578ea 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -129,10 +129,12 @@ typedef struct {
* SMPCompatProps:
* @prefer_sockets - whether sockets are preferred over cores in smp parsing
* @dies_supported - whether dies are supported by the machine
+ * @clusters_supported - whether clusters are supported by the machine
*/
typedef struct {
bool prefer_sockets;
bool dies_supported;
+ bool clusters_supported;
} SMPCompatProps;
/**
@@ -299,7 +301,8 @@ typedef struct DeviceMemoryState {
* @cpus: the number of present logical processors on the machine
* @sockets: the number of sockets on the machine
* @dies: the number of dies in one socket
- * @cores: the number of cores in one die
+ * @clusters: the number of clusters in one die
+ * @cores: the number of cores in one cluster
* @threads: the number of threads in one core
* @max_cpus: the maximum number of logical processors on the machine
*/
@@ -307,6 +310,7 @@ typedef struct CpuTopology {
unsigned int cpus;
unsigned int sockets;
unsigned int dies;
+ unsigned int clusters;
unsigned int cores;
unsigned int threads;
unsigned int max_cpus;
diff --git a/qapi/machine.json b/qapi/machine.json
index edeab6084b..372535b348 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -1404,7 +1404,9 @@
#
# @dies: number of dies per socket in the CPU topology
#
-# @cores: number of cores per die in the CPU topology
+# @clusters: number of clusters per die in the CPU topology (since 7.0)
+#
+# @cores: number of cores per cluster in the CPU topology
#
# @threads: number of threads per core in the CPU topology
#
@@ -1416,6 +1418,7 @@
'*cpus': 'int',
'*sockets': 'int',
'*dies': 'int',
+ '*clusters': 'int',
'*cores': 'int',
'*threads': 'int',
'*maxcpus': 'int' } }
diff --git a/qemu-options.hx b/qemu-options.hx
index b39377de3f..fd1f8135fb 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -206,13 +206,14 @@ SRST
ERST
DEF("smp", HAS_ARG, QEMU_OPTION_smp,
- "-smp [[cpus=]n][,maxcpus=maxcpus][,sockets=sockets][,dies=dies][,cores=cores][,threads=threads]\n"
+ "-smp [[cpus=]n][,maxcpus=maxcpus][,sockets=sockets][,dies=dies][,clusters=clusters][,cores=cores][,threads=threads]\n"
" set the number of initial CPUs to 'n' [default=1]\n"
" maxcpus= maximum number of total CPUs, including\n"
" offline CPUs for hotplug, etc\n"
" sockets= number of sockets on the machine board\n"
" dies= number of dies in one socket\n"
- " cores= number of cores in one die\n"
+ " clusters= number of clusters in one die\n"
+ " cores= number of cores in one cluster\n"
" threads= number of threads in one core\n"
"Note: Different machines may have different subsets of the CPU topology\n"
" parameters supported, so the actual meaning of the supported parameters\n"
@@ -228,7 +229,7 @@ DEF("smp", HAS_ARG, QEMU_OPTION_smp,
" must be set as 1 in the purpose of correct parsing.\n",
QEMU_ARCH_ALL)
SRST
-``-smp [[cpus=]n][,maxcpus=maxcpus][,sockets=sockets][,dies=dies][,cores=cores][,threads=threads]``
+``-smp [[cpus=]n][,maxcpus=maxcpus][,sockets=sockets][,dies=dies][,clusters=clusters][,cores=cores][,threads=threads]``
Simulate a SMP system with '\ ``n``\ ' CPUs initially present on
the machine type board. On boards supporting CPU hotplug, the optional
'\ ``maxcpus``\ ' parameter can be set to enable further CPUs to be
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 620a1f1367..d9e4c619d3 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -727,6 +727,9 @@ static QemuOptsList qemu_smp_opts = {
.name = "dies",
.type = QEMU_OPT_NUMBER,
}, {
+ .name = "clusters",
+ .type = QEMU_OPT_NUMBER,
+ }, {
.name = "cores",
.type = QEMU_OPT_NUMBER,
}, {
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-19 08:14:20 +0000