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numa: Parse initiator= attribute before cpus= attribute

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When parsing cpus= attribute of -numa object couple of checks
is performed, such as correct initiator setting (see the if()
statement at the end of for() loop in
machine_set_cpu_numa_node()).

However, with the current code cpus= attribute is parsed before
initiator= attribute and thus the check may fail even though it
is not obvious why. But since parsing the initiator= attribute
does not depend on the cpus= attribute we can swap the order of
the two.

It's fairly easy to reproduce with the following command line
(snippet of an actual cmd line):

  -smp 4,sockets=4,cores=1,threads=1 \
  -object '{"qom-type":"memory-backend-ram","id":"ram-node0","size":2147483648}' \
  -numa node,nodeid=0,cpus=0-1,initiator=0,memdev=ram-node0 \
  -object '{"qom-type":"memory-backend-ram","id":"ram-node1","size":2147483648}' \
  -numa node,nodeid=1,cpus=2-3,initiator=1,memdev=ram-node1 \
  -numa hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-latency,latency=5 \
  -numa hmat-lb,initiator=0,target=0,hierarchy=first-level,data-type=access-latency,latency=10 \
  -numa hmat-lb,initiator=1,target=1,hierarchy=memory,data-type=access-latency,latency=5 \
  -numa hmat-lb,initiator=1,target=1,hierarchy=first-level,data-type=access-latency,latency=10 \
  -numa hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-bandwidth,bandwidth=204800K \
  -numa hmat-lb,initiator=0,target=0,hierarchy=first-level,data-type=access-bandwidth,bandwidth=208896K \
  -numa hmat-lb,initiator=1,target=1,hierarchy=memory,data-type=access-bandwidth,bandwidth=204800K \
  -numa hmat-lb,initiator=1,target=1,hierarchy=first-level,data-type=access-bandwidth,bandwidth=208896K \
  -numa hmat-cache,node-id=0,size=10K,level=1,associativity=direct,policy=write-back,line=8 \
  -numa hmat-cache,node-id=1,size=10K,level=1,associativity=direct,policy=write-back,line=8 \

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <b27a6a88986d63e3f610a728c845e01ff8d92e2e.1625662776.git.mprivozn@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Michal Privoznik 2021-07-07 15:40:30 +02:00 committed by Eduardo Habkost
parent f74d339c86
commit 294aa0437b
1 changed files with 23 additions and 22 deletions
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45
hw/core/numa.c
View File

@ -88,6 +88,29 @@ static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
return;
}
/*
* If not set the initiator, set it to MAX_NODES. And if
* HMAT is enabled and this node has no cpus, QEMU will raise error.
*/
numa_info[nodenr].initiator = MAX_NODES;
if (node->has_initiator) {
if (!ms->numa_state->hmat_enabled) {
error_setg(errp, "ACPI Heterogeneous Memory Attribute Table "
"(HMAT) is disabled, enable it with -machine hmat=on "
"before using any of hmat specific options");
return;
}
if (node->initiator >= MAX_NODES) {
error_report("The initiator id %" PRIu16 " expects an integer "
"between 0 and %d", node->initiator,
MAX_NODES - 1);
return;
}
numa_info[nodenr].initiator = node->initiator;
}
for (cpus = node->cpus; cpus; cpus = cpus->next) {
CpuInstanceProperties props;
if (cpus->value >= max_cpus) {
@ -142,28 +165,6 @@ static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
}
/*
* If not set the initiator, set it to MAX_NODES. And if
* HMAT is enabled and this node has no cpus, QEMU will raise error.
*/
numa_info[nodenr].initiator = MAX_NODES;
if (node->has_initiator) {
if (!ms->numa_state->hmat_enabled) {
error_setg(errp, "ACPI Heterogeneous Memory Attribute Table "
"(HMAT) is disabled, enable it with -machine hmat=on "
"before using any of hmat specific options");
return;
}
if (node->initiator >= MAX_NODES) {
error_report("The initiator id %" PRIu16 " expects an integer "
"between 0 and %d", node->initiator,
MAX_NODES - 1);
return;
}
numa_info[nodenr].initiator = node->initiator;
}
numa_info[nodenr].present = true;
max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
ms->numa_state->num_nodes++;