diff --git a/include/hw/pci-host/pnv_phb4.h b/include/hw/pci-host/pnv_phb4.h
index c882bfd0aa23..ea3810f74066 100644
--- a/include/hw/pci-host/pnv_phb4.h
+++ b/include/hw/pci-host/pnv_phb4.h
@@ -227,4 +227,15 @@ typedef struct PnvPhb4PecClass {
     int stk_compat_size;
 } PnvPhb4PecClass;
 
+/*
+ * POWER10 definitions
+ */
+
+#define PNV_PHB5_VERSION           0x000000a500000001ull
+#define PNV_PHB5_DEVICE_ID         0x0652
+
+#define TYPE_PNV_PHB5_PEC "pnv-phb5-pec"
+#define PNV_PHB5_PEC(obj) \
+    OBJECT_CHECK(PnvPhb4PecState, (obj), TYPE_PNV_PHB5_PEC)
+
 #endif /* PCI_HOST_PNV_PHB4_H */
diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index 86bfa2107a8c..516229a51e7b 100644
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -127,6 +127,9 @@ typedef struct Pnv10Chip {
     uint32_t     nr_quads;
     PnvQuad      *quads;
 
+#define PNV10_CHIP_MAX_PEC 2
+    PnvPhb4PecState pecs[PNV10_CHIP_MAX_PEC];
+
 } Pnv10Chip;
 
 #define PNV10_PIR2FUSEDCORE(pir) (((pir) >> 3) & 0xf)
diff --git a/include/hw/ppc/pnv_xscom.h b/include/hw/ppc/pnv_xscom.h
index f26c5217764d..433c7b878af4 100644
--- a/include/hw/ppc/pnv_xscom.h
+++ b/include/hw/ppc/pnv_xscom.h
@@ -139,6 +139,12 @@ typedef struct PnvXScomInterfaceClass {
 #define PNV10_XSCOM_XIVE2_BASE     0x2010800
 #define PNV10_XSCOM_XIVE2_SIZE     0x400
 
+#define PNV10_XSCOM_PEC_NEST_BASE  0x3011800 /* index goes downwards ... */
+#define PNV10_XSCOM_PEC_NEST_SIZE  0x100
+
+#define PNV10_XSCOM_PEC_PCI_BASE   0x8010800 /* index goes upwards ... */
+#define PNV10_XSCOM_PEC_PCI_SIZE   0x200
+
 void pnv_xscom_realize(PnvChip *chip, uint64_t size, Error **errp);
 int pnv_dt_xscom(PnvChip *chip, void *fdt, int root_offset,
                  uint64_t xscom_base, uint64_t xscom_size,
diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
index 911d147ffd7d..869fd77b62cc 100644
--- a/hw/pci-host/pnv_phb4_pec.c
+++ b/hw/pci-host/pnv_phb4_pec.c
@@ -586,9 +586,53 @@ static const TypeInfo pnv_pec_stk_type_info = {
     }
 };
 
+/*
+ * POWER10 definitions
+ */
+
+static uint32_t pnv_phb5_pec_xscom_pci_base(PnvPhb4PecState *pec)
+{
+    return PNV10_XSCOM_PEC_PCI_BASE + 0x1000000 * pec->index;
+}
+
+static uint32_t pnv_phb5_pec_xscom_nest_base(PnvPhb4PecState *pec)
+{
+    /* index goes down ... */
+    return PNV10_XSCOM_PEC_NEST_BASE - 0x1000000 * pec->index;
+}
+
+static void pnv_phb5_pec_class_init(ObjectClass *klass, void *data)
+{
+    PnvPhb4PecClass *pecc = PNV_PHB4_PEC_CLASS(klass);
+    static const char compat[] = "ibm,power10-pbcq";
+    static const char stk_compat[] = "ibm,power10-phb-stack";
+
+    pecc->xscom_nest_base = pnv_phb5_pec_xscom_nest_base;
+    pecc->xscom_pci_base  = pnv_phb5_pec_xscom_pci_base;
+    pecc->xscom_nest_size = PNV10_XSCOM_PEC_NEST_SIZE;
+    pecc->xscom_pci_size  = PNV10_XSCOM_PEC_PCI_SIZE;
+    pecc->compat = compat;
+    pecc->compat_size = sizeof(compat);
+    pecc->stk_compat = stk_compat;
+    pecc->stk_compat_size = sizeof(stk_compat);
+}
+
+static const TypeInfo pnv_phb5_pec_type_info = {
+    .name          = TYPE_PNV_PHB5_PEC,
+    .parent        = TYPE_PNV_PHB4_PEC,
+    .instance_size = sizeof(PnvPhb4PecState),
+    .class_init    = pnv_phb5_pec_class_init,
+    .class_size    = sizeof(PnvPhb4PecClass),
+    .interfaces    = (InterfaceInfo[]) {
+        { TYPE_PNV_XSCOM_INTERFACE },
+        { }
+    }
+};
+
 static void pnv_pec_register_types(void)
 {
     type_register_static(&pnv_pec_type_info);
+    type_register_static(&pnv_phb5_pec_type_info);
     type_register_static(&pnv_pec_stk_type_info);
 }
 
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index fc751dd575d4..ac4bd2a17a9e 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -705,9 +705,17 @@ static void pnv_ipmi_bt_init(ISABus *bus, IPMIBmc *bmc, uint32_t irq)
 static void pnv_chip_power10_pic_print_info(PnvChip *chip, Monitor *mon)
 {
     Pnv10Chip *chip10 = PNV10_CHIP(chip);
+    int i, j;
 
     pnv_xive2_pic_print_info(&chip10->xive, mon);
     pnv_psi_pic_print_info(&chip10->psi, mon);
+
+    for (i = 0; i < PNV10_CHIP_MAX_PEC; i++) {
+        PnvPhb4PecState *pec = &chip10->pecs[i];
+        for (j = 0; j < pec->num_stacks; j++) {
+            pnv_phb4_pic_print_info(&pec->stacks[j].phb, mon);
+        }
+    }
 }
 
 static void pnv_init(MachineState *machine)
@@ -1607,7 +1615,10 @@ static void pnv_chip_power9_class_init(ObjectClass *klass, void *data)
 
 static void pnv_chip_power10_instance_init(Object *obj)
 {
+    PnvChip *chip = PNV_CHIP(obj);
     Pnv10Chip *chip10 = PNV10_CHIP(obj);
+    PnvChipClass *pcc = PNV_CHIP_GET_CLASS(obj);
+    int i;
 
     object_initialize_child(obj, "xive", &chip10->xive, sizeof(chip10->xive),
                             TYPE_PNV_XIVE2, &error_abort, NULL);
@@ -1619,6 +1630,17 @@ static void pnv_chip_power10_instance_init(Object *obj)
                             TYPE_PNV10_LPC, &error_abort, NULL);
     object_initialize_child(obj, "occ",  &chip10->occ, sizeof(chip10->occ),
                             TYPE_PNV10_OCC, &error_abort, NULL);
+
+    for (i = 0; i < PNV10_CHIP_MAX_PEC; i++) {
+        object_initialize_child(obj, "pec[*]", &chip10->pecs[i],
+                                sizeof(chip10->pecs[i]), TYPE_PNV_PHB5_PEC,
+                                &error_abort, NULL);
+    }
+
+    /*
+     * Number of PHBs is the chip default
+     */
+    chip->num_phbs = pcc->num_phbs;
 }
 
 
@@ -1648,6 +1670,77 @@ static void pnv_chip_power10_quad_realize(Pnv10Chip *chip10, Error **errp)
     }
 }
 
+static void pnv_chip_power10_phb_realize(PnvChip *chip, Error **errp)
+{
+    Pnv10Chip *chip10 = PNV10_CHIP(chip);
+    Error *local_err = NULL;
+    int i, j;
+    int phb_id = 0;
+
+    for (i = 0; i < PNV10_CHIP_MAX_PEC; i++) {
+        PnvPhb4PecState *pec = &chip10->pecs[i];
+        PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
+        uint32_t pec_nest_base;
+        uint32_t pec_pci_base;
+
+        object_property_set_int(OBJECT(pec), i, "index", &error_fatal);
+        /*
+         * PEC0 -> 3 stacks
+         * PEC1 -> 3 stacks
+         */
+        object_property_set_int(OBJECT(pec), 3, "num-stacks",
+                                &error_fatal);
+        object_property_set_int(OBJECT(pec), chip->chip_id, "chip-id",
+                                 &error_fatal);
+        object_property_set_link(OBJECT(pec), OBJECT(get_system_memory()),
+                                 "system-memory", &error_abort);
+        object_property_set_bool(OBJECT(pec), true, "realized", &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return;
+        }
+
+        pec_nest_base = pecc->xscom_nest_base(pec);
+        pec_pci_base = pecc->xscom_pci_base(pec);
+
+        pnv_xscom_add_subregion(chip, pec_nest_base, &pec->nest_regs_mr);
+        pnv_xscom_add_subregion(chip, pec_pci_base, &pec->pci_regs_mr);
+
+        for (j = 0; j < pec->num_stacks && phb_id < chip->num_phbs;
+             j++, phb_id++) {
+            PnvPhb4PecStack *stack = &pec->stacks[j];
+            Object *obj = OBJECT(&stack->phb);
+
+            object_property_set_int(obj, phb_id, "index", &error_fatal);
+            object_property_set_int(obj, chip->chip_id, "chip-id",
+                                    &error_fatal);
+            object_property_set_int(obj, PNV_PHB5_VERSION, "version",
+                                    &error_fatal);
+            object_property_set_int(obj, PNV_PHB5_DEVICE_ID, "device-id",
+                                    &error_fatal);
+            object_property_set_link(obj, OBJECT(stack), "stack", &error_abort);
+            object_property_set_bool(obj, true, "realized", &local_err);
+            if (local_err) {
+                error_propagate(errp, local_err);
+                return;
+            }
+            qdev_set_parent_bus(DEVICE(obj), sysbus_get_default());
+
+            /* Populate the XSCOM address space. */
+            pnv_xscom_add_subregion(chip,
+                                   pec_nest_base + 0x40 * (stack->stack_no + 1),
+                                   &stack->nest_regs_mr);
+            pnv_xscom_add_subregion(chip,
+                                    pec_pci_base + 0x40 * (stack->stack_no + 1),
+                                    &stack->pci_regs_mr);
+            pnv_xscom_add_subregion(chip,
+                                    pec_pci_base + PNV9_XSCOM_PEC_PCI_STK0 +
+                                    0x40 * stack->stack_no,
+                                    &stack->phb_regs_mr);
+        }
+    }
+}
+
 static void pnv_chip_power10_realize(DeviceState *dev, Error **errp)
 {
     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(dev);
@@ -1737,6 +1830,13 @@ static void pnv_chip_power10_realize(DeviceState *dev, Error **errp)
     }
     pnv_xscom_add_subregion(chip, PNV10_XSCOM_OCC_BASE,
                             &chip10->occ.xscom_regs);
+
+    /* PHBs */
+    pnv_chip_power10_phb_realize(chip, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
 }
 
 static uint32_t pnv_chip_power10_xscom_pcba(PnvChip *chip, uint64_t addr)
@@ -1763,6 +1863,7 @@ static void pnv_chip_power10_class_init(ObjectClass *klass, void *data)
     k->xscom_core_base = pnv_chip_power10_xscom_core_base;
     k->xscom_pcba = pnv_chip_power10_xscom_pcba;
     dc->desc = "PowerNV Chip POWER10";
+    k->num_phbs = 6;
 
     device_class_set_parent_realize(dc, pnv_chip_power10_realize,
                                     &k->parent_realize);
