[Qemu-devel] [PATCH v9 17/18] hw/arm/boot: Expose the pmem nodes in the DT

[Eric Auger <eric.auger@redhat.com>]

In case of NV-DIMM slots, let's add /pmem DT nodes.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v6 -> v7
- does the same rework as for fdt_add_memory_node
---
 hw/arm/boot.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 4caaf91583..45e29b7b4a 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -450,6 +450,32 @@ out:
     return ret;
 }
 
+static int fdt_add_pmem_node(void *fdt, uint32_t acells, hwaddr mem_base,
+                             uint32_t scells, hwaddr mem_len,
+                             int numa_node_id)
+{
+    char *nodename;
+    int ret;
+
+    nodename = g_strdup_printf("/pmem@%" PRIx64, mem_base);
+    qemu_fdt_add_subnode(fdt, nodename);
+    qemu_fdt_setprop_string(fdt, nodename, "compatible", "pmem-region");
+    ret = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg", acells, mem_base,
+                                       scells, mem_len);
+    if (ret < 0) {
+        goto out;
+    }
+
+    /* only set the NUMA ID if it is specified */
+    if (numa_node_id >= 0) {
+        ret = qemu_fdt_setprop_cell(fdt, nodename,
+                                    "numa-node-id", numa_node_id);
+    }
+out:
+    g_free(nodename);
+    return ret;
+}
+
 static void fdt_add_psci_node(void *fdt)
 {
     uint32_t cpu_suspend_fn;
@@ -546,6 +572,20 @@ static int fdt_add_hotpluggable_memory_nodes(void *fdt,
             }
             break;
         }
+        case MEMORY_DEVICE_INFO_KIND_NVDIMM:
+        {
+            PCDIMMDeviceInfo *di = mi->u.nvdimm.data;
+
+            ret = fdt_add_pmem_node(fdt, acells, di->addr,
+                                    scells, di->size, di->node);
+            if (ret) {
+                fprintf(stderr,
+                        "couldn't add NVDIMM /memory@%"PRIx64" node\n",
+                        di->addr);
+                goto out;
+            }
+            break;
+        }
         default:
             fprintf(stderr, "%s memory nodes are not yet supported\n",
                     MemoryDeviceInfoKind_str(mi->type));
-- 
2.20.1