+ }
+
if (s->len && !qtest_enabled()) {
warn_report("CPU(s) not present in any NUMA nodes: %s",
s->str);
diff --git a/hw/core/numa.c b/hw/core/numa.c
index 8fcbba05d6..cfb6339810 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -128,6 +128,19 @@ static void parse_numa_node(MachineState *ms,
NumaNodeOptions *node,
numa_info[nodenr].node_mem = object_property_get_uint(o, "size",
NULL);
numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
}
+
+ if (node->has_initiator) {
+ if (numa_info[nodenr].initiator_valid &&
+ (node->initiator != numa_info[nodenr].initiator)) {
+ error_setg(errp, "The initiator of NUMA node %" PRIu16 " has been "
+ "set to node %" PRIu16, nodenr,
+ numa_info[nodenr].initiator);
+ return;
+ }
+
+ numa_info[nodenr].initiator_valid = true;
+ numa_info[nodenr].initiator = node->initiator;
^^^
not validated user input? (which could lead to read beyond numa_info[]
boundaries
in previous hunk).
+ }
numa_info[nodenr].present = true;
max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
ms->numa_state->num_nodes++;
diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h
index 76da3016db..46ad06e000 100644
--- a/include/sysemu/numa.h
+++ b/include/sysemu/numa.h
@@ -10,6 +10,9 @@ struct NodeInfo {
uint64_t node_mem;
struct HostMemoryBackend *node_memdev;
bool present;
+ bool has_cpu;
+ bool initiator_valid;
+ uint16_t initiator;
uint8_t distance[MAX_NODES];
};
diff --git a/qapi/machine.json b/qapi/machine.json
index 6db8a7e2ec..05e367d26a 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -414,6 +414,9 @@
# @memdev: memory backend object. If specified for one node,
# it must be specified for all nodes.
#
+# @initiator: the initiator numa nodeid that is closest (as in directly
+# attached) to this numa node (since 4.2)
well, it's pretty unclear what doc comment means (unless reader knows well
specific part of ACPI spec)
suggest to rephrase to something more understandable for unaware
readers (+ possible reference to spec for those who is interested
in spec definition since this doc is meant for developers).
+#
# Since: 2.1
##
{ 'struct': 'NumaNodeOptions',
@@ -421,7 +424,8 @@
'*nodeid': 'uint16',
'*cpus': ['uint16'],
'*mem': 'size',
- '*memdev': 'str' }}
+ '*memdev': 'str',
+ '*initiator': 'uint16' }}
##
# @NumaDistOptions:
diff --git a/qemu-options.hx b/qemu-options.hx
index 9621e934c0..c480781992 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -161,14 +161,14 @@ If any on the three values is given, the total number of
CPUs @var{n} can be omi
ETEXI
DEF("numa", HAS_ARG, QEMU_OPTION_numa,
- "-numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
- "-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
+ "-numa
node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=node]\n"
+ "-numa
node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=node]\n"
"-numa dist,src=source,dst=destination,val=distance\n"
"-numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]\n",
QEMU_ARCH_ALL)
STEXI
-@item -numa
node[,mem=@var{size}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
-@itemx -numa
node[,memdev=@var{id}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
+@item -numa
node[,mem=@var{size}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}][,initiator=@var{initiator}]
+@itemx -numa
node[,memdev=@var{id}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}][,initiator=@var{initiator}]
@itemx -numa dist,src=@var{source},dst=@var{destination},val=@var{distance}
@itemx -numa
cpu,node-id=@var{node}[,socket-id=@var{x}][,core-id=@var{y}][,thread-id=@var{z}]
@findex -numa
@@ -215,6 +215,25 @@ split equally between them.
@samp{mem} and @samp{memdev} are mutually exclusive. Furthermore,
if one node uses @samp{memdev}, all of them have to use it.
+@samp{initiator} indicate the initiator NUMA @var{initiator} that is
^^^^^^^ ^^^^^^^^^^^^^^
above will result in "initiator NUMA initiator", was it your intention?
+closest (as in directly attached) to this NUMA @var{node}.
Again suggest replace spec language with something more user friendly
(this time without spec reference as it's geared for end user)
+For example, the following option assigns 2 NUMA nodes, node 0 has CPU.
Following example creates a machine with 2 NUMA ...
+node 1 has only memory, and its' initiator is node 0. Note that because
+node 0 has CPU, by default the initiator of node 0 is itself and must be
+itself.
+@example
+-M pc \
+-m 2G,slots=2,maxmem=4G \
+-object memory-backend-ram,size=1G,id=m0 \
+-object memory-backend-ram,size=1G,id=m1 \
+-numa node,nodeid=0,memdev=m0 \
+-numa node,nodeid=1,memdev=m1,initiator=0 \
+-smp 2,sockets=2,maxcpus=2 \
+-numa cpu,node-id=0,socket-id=0 \
+-numa cpu,node-id=0,socket-id=1 \
+@end example
+
@var{source} and @var{destination} are NUMA node IDs.
@var{distance} is the NUMA distance from @var{source} to @var{destination}.
The distance from a node to itself is always 10. If any pair of nodes is
