[Qemu-devel] [PATCH V11 06/11] NUMA: parse guest numa nodes memory policy

[Wanlong Gao]

The memory policy setting format is like:
    policy={default|membind|interleave|preferred}[,relative=true],host-nodes=N-N
And we are adding this setting as a suboption of "-numa mem,",
the memory policy then can be set like following:
    -numa node,nodeid=0,cpus=0 \
    -numa node,nodeid=1,cpus=1 \
    -numa mem,nodeid=0,size=1G,policy=membind,host-nodes=0-1 \
    -numa mem,nodeid=1,size=1G,policy=interleave,relative=true,host-nodes=1

Signed-off-by: Wanlong Gao <address@hidden>
---
 include/sysemu/sysemu.h |  5 ++++-
 numa.c                  | 13 +++++++++++++
 qapi-schema.json        | 33 +++++++++++++++++++++++++++++++--
 vl.c                    |  3 +++
 4 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index e1e4320..2d04bad 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -127,13 +127,16 @@ extern size_t boot_splash_filedata_size;
 extern uint8_t qemu_extra_params_fw[2];
 extern QEMUClockType rtc_clock;
 
-#define MAX_NODES 64
+#define MAX_NODES 128
 #define MAX_CPUMASK_BITS 255
 extern int nb_numa_nodes;
 extern int nb_numa_mem_nodes;
 typedef struct node_info {
     uint64_t node_mem;
     DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS);
+    DECLARE_BITMAP(host_mem, MAX_NODES);
+    NumaNodePolicy policy;
+    bool relative;
 } NodeInfo;
 extern NodeInfo numa_info[MAX_NODES];
 extern QemuOptsList qemu_numa_opts;
diff --git a/numa.c b/numa.c
index 3e2dfc1..4ccc6cb 100644
--- a/numa.c
+++ b/numa.c
@@ -74,6 +74,7 @@ static int numa_mem_parse(NumaMemOptions *opts)
 {
     uint16_t nodenr;
     uint64_t mem_size;
+    uint16List *nodes;
 
     if (opts->has_nodeid) {
         nodenr = opts->nodeid;
@@ -91,6 +92,18 @@ static int numa_mem_parse(NumaMemOptions *opts)
         numa_info[nodenr].node_mem = mem_size;
     }
 
+    if (opts->has_policy) {
+        numa_info[nodenr].policy = opts->policy;
+    }
+
+    if (opts->has_relative) {
+        numa_info[nodenr].relative = opts->relative;
+    }
+
+    for (nodes = opts->host_nodes; nodes; nodes = nodes->next) {
+        bitmap_set(numa_info[nodenr].host_mem, nodes->value, 1);
+    }
+
     return 0;
 }
 
diff --git a/qapi-schema.json b/qapi-schema.json
index 11851a1..2160130 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3806,6 +3806,26 @@
    '*mem':    'str' }}
 
 ##
+# @NumaNodePolicy
+#
+# NUMA node policy types
+#
+# @default: restore default policy, remove any nondefault policy
+#
+# @preferred: set the preferred node for allocation
+#
+# @membind: a strict policy that restricts memory allocation to the
+#           nodes specified
+#
+# @interleave: the page allocations is interleaved across the set
+#              of nodes specified
+#
+# Since 1.7
+##
+{ 'enum': 'NumaNodePolicy',
+  'data': [ 'default', 'preferred', 'membind', 'interleave' ] }
+
+##
 # @NumaMemOptions
 #
 # Set memory information of guest NUMA node. (for OptsVisitor)
@@ -3814,9 +3834,18 @@
 #
 # @size: #optional memory size of this node
 #
+# @policy: #optional memory policy of this node
+#
+# @relative: #optional if the nodes specified are relative
+#
+# @host-nodes: #optional host nodes for its memory policy
+#
 # Since 1.7
 ##
 { 'type': 'NumaMemOptions',
   'data': {
-   '*nodeid': 'uint16',
-   '*size':   'size' }}
+   '*nodeid':     'uint16',
+   '*size':       'size',
+   '*policy':     'NumaNodePolicy',
+   '*relative':   'bool',
+   '*host-nodes': ['uint16'] }}
diff --git a/vl.c b/vl.c
index 99667a0..c4cc623 100644
--- a/vl.c
+++ b/vl.c
@@ -2888,6 +2888,9 @@ int main(int argc, char **argv, char **envp)
     for (i = 0; i < MAX_NODES; i++) {
         numa_info[i].node_mem = 0;
         bitmap_zero(numa_info[i].node_cpu, MAX_CPUMASK_BITS);
+        bitmap_zero(numa_info[i].host_mem, MAX_NODES);
+        numa_info[i].policy = NUMA_NODE_POLICY_DEFAULT;
+        numa_info[i].relative = false;
     }
 
     nb_numa_nodes = 0;
-- 
1.8.4