From: Zhao Liu <zhao1.liu@xxxxxxxxx>
As module-level topology support is added to X86CPU, now we can enable
the support for the modules parameter on PC machines. With this support,
we can define a 5-level x86 CPU topology with "-smp":
-smp cpus=*,maxcpus=*,sockets=*,dies=*,modules=*,cores=*,threads=*.
Additionally, add the 5-level topology example in description of "-smp".
Tested-by: Yongwei Ma <yongwei.ma@xxxxxxxxx>
Co-developed-by: Zhuocheng Ding <zhuocheng.ding@xxxxxxxxx>
Signed-off-by: Zhuocheng Ding <zhuocheng.ding@xxxxxxxxx>
Signed-off-by: Zhao Liu <zhao1.liu@xxxxxxxxx>
---
Changes since v8:
* Add missing "modules" parameter in -smp example.
Changes since v7:
* Supported modules instead of clusters for PC.
* Dropped Michael/Babu/Yanan's ACKed/Tested/Reviewed tags since the
code change.
* Re-added Yongwei's Tested tag For his re-testing.
---
hw/i386/pc.c | 1 +
qemu-options.hx | 18 ++++++++++--------
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f8eb684a4926..b270a66605fc 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1830,6 +1830,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE;
mc->nvdimm_supported = true;
mc->smp_props.dies_supported = true;
+ mc->smp_props.modules_supported = true;
mc->default_ram_id = "pc.ram";
pcmc->default_smbios_ep_type = SMBIOS_ENTRY_POINT_TYPE_64;
diff --git a/qemu-options.hx b/qemu-options.hx
index 9be1e5817c7d..b5784fda32cb 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -281,7 +281,8 @@ ERST
DEF("smp", HAS_ARG, QEMU_OPTION_smp,
"-smp [[cpus=]n][,maxcpus=maxcpus][,drawers=drawers][,books=books][,sockets=sockets]\n"
- " [,dies=dies][,clusters=clusters][,cores=cores][,threads=threads]\n"
+ " [,dies=dies][,clusters=clusters][,modules=modules][,cores=cores]\n"
+ " [,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"
@@ -290,7 +291,8 @@ DEF("smp", HAS_ARG, QEMU_OPTION_smp,
" sockets= number of sockets in one book\n"
" dies= number of dies in one socket\n"
" clusters= number of clusters in one die\n"
- " cores= number of cores in one cluster\n"
+ " modules= number of modules in one cluster\n"
+ " cores= number of cores in one module\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"
@@ -306,7 +308,7 @@ 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][,clusters=clusters][,cores=cores][,threads=threads]``
+``-smp [[cpus=]n][,maxcpus=maxcpus][,drawers=drawers][,books=books][,sockets=sockets][,dies=dies][,clusters=clusters][,modules=modules][,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
@@ -345,14 +347,14 @@ SRST
-smp 8,sockets=2,cores=2,threads=2,maxcpus=8
The following sub-option defines a CPU topology hierarchy (2 sockets
- totally on the machine, 2 dies per socket, 2 cores per die, 2 threads
- per core) for PC machines which support sockets/dies/cores/threads.
- Some members of the option can be omitted but their values will be
- automatically computed:
+ totally on the machine, 2 dies per socket, 2 modules per die, 2 cores per
+ module, 2 threads per core) for PC machines which support sockets/dies
+ /modules/cores/threads. Some members of the option can be omitted but
+ their values will be automatically computed:
::
- -smp 16,sockets=2,dies=2,cores=2,threads=2,maxcpus=16
+ -smp 32,sockets=2,dies=2,modules=2,cores=2,threads=2,maxcpus=32
The following sub-option defines a CPU topology hierarchy (2 sockets
totally on the machine, 2 clusters per socket, 2 cores per cluster,
--
2.34.1
