diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 16f4e407ee..c0a5703b74 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -282,7 +282,9 @@ static void pnv_chip_power8_dt_populate(PnvChip *chip, void *fdt)
 {
     int i;
 
-    pnv_dt_xscom(chip, fdt, 0);
+    pnv_dt_xscom(chip, fdt, 0,
+                 cpu_to_be64(PNV_XSCOM_BASE(chip)),
+                 cpu_to_be64(PNV_XSCOM_SIZE));
 
     for (i = 0; i < chip->nr_cores; i++) {
         PnvCore *pnv_core = chip->cores[i];
@@ -302,7 +304,9 @@ static void pnv_chip_power9_dt_populate(PnvChip *chip, void *fdt)
 {
     int i;
 
-    pnv_dt_xscom(chip, fdt, 0);
+    pnv_dt_xscom(chip, fdt, 0,
+                 cpu_to_be64(PNV9_XSCOM_BASE(chip)),
+                 cpu_to_be64(PNV9_XSCOM_SIZE));
 
     for (i = 0; i < chip->nr_cores; i++) {
         PnvCore *pnv_core = chip->cores[i];
@@ -321,7 +325,9 @@ static void pnv_chip_power10_dt_populate(PnvChip *chip, void *fdt)
 {
     int i;
 
-    pnv_dt_xscom(chip, fdt, 0);
+    pnv_dt_xscom(chip, fdt, 0,
+                 cpu_to_be64(PNV10_XSCOM_BASE(chip)),
+                 cpu_to_be64(PNV10_XSCOM_SIZE));
 
     for (i = 0; i < chip->nr_cores; i++) {
         PnvCore *pnv_core = chip->cores[i];
diff --git a/hw/ppc/pnv_xscom.c b/hw/ppc/pnv_xscom.c
index df926003f2..8189767eb0 100644
--- a/hw/ppc/pnv_xscom.c
+++ b/hw/ppc/pnv_xscom.c
@@ -286,24 +286,14 @@ static const char compat_p8[] = "ibm,power8-xscom\0ibm,xscom";
 static const char compat_p9[] = "ibm,power9-xscom\0ibm,xscom";
 static const char compat_p10[] = "ibm,power10-xscom\0ibm,xscom";
 
-int pnv_dt_xscom(PnvChip *chip, void *fdt, int root_offset)
+int pnv_dt_xscom(PnvChip *chip, void *fdt, int root_offset,
+                 uint64_t xscom_base, uint64_t xscom_size)
 {
-    uint64_t reg[2];
+    uint64_t reg[] = { xscom_base, xscom_size };
     int xscom_offset;
     ForeachPopulateArgs args;
     char *name;
 
-    if (pnv_chip_is_power10(chip)) {
-        reg[0] = cpu_to_be64(PNV10_XSCOM_BASE(chip));
-        reg[1] = cpu_to_be64(PNV10_XSCOM_SIZE);
-    } else if (pnv_chip_is_power9(chip)) {
-        reg[0] = cpu_to_be64(PNV9_XSCOM_BASE(chip));
-        reg[1] = cpu_to_be64(PNV9_XSCOM_SIZE);
-    } else {
-        reg[0] = cpu_to_be64(PNV_XSCOM_BASE(chip));
-        reg[1] = cpu_to_be64(PNV_XSCOM_SIZE);
-    }
-
     name = g_strdup_printf("xscom@%" PRIx64, be64_to_cpu(reg[0]));
     xscom_offset = fdt_add_subnode(fdt, root_offset, name);
     _FDT(xscom_offset);
diff --git a/include/hw/ppc/pnv_xscom.h b/include/hw/ppc/pnv_xscom.h
index 2bdb7ae84f..ad53f788b4 100644
--- a/include/hw/ppc/pnv_xscom.h
+++ b/include/hw/ppc/pnv_xscom.h
@@ -114,7 +114,8 @@ typedef struct PnvXScomInterfaceClass {
 #define PNV10_XSCOM_PSIHB_SIZE     0x100
 
 void pnv_xscom_realize(PnvChip *chip, uint64_t size, Error **errp);
-int pnv_dt_xscom(PnvChip *chip, void *fdt, int offset);
+int pnv_dt_xscom(PnvChip *chip, void *fdt, int root_offset,
+                 uint64_t xscom_base, uint64_t xscom_size);
 
 void pnv_xscom_add_subregion(PnvChip *chip, hwaddr offset,
                              MemoryRegion *mr);