[PATCH 14/17] Revert "ppc/pnv: Introduce support for user created PHB4 devices"

[Daniel Henrique Barboza]

The upcoming code that allows for user creatable pnv-phb4 devices relies
on finding the correct pnv-phb4-pec controller to associate with. At
this moment the code that added support for user creatable pnv-phb4-pec
devices does not update chip9->pecs[] and pec->chip->num_pecs after
pnv_pec_realize(). This is not trivial to do because chip9-pecs[] is an
array of PEC devices, not an array of pointers to PEC devices.

All of this wasn't a problem back when this commit was introduced
because the pnv-phb4 devices of each pnv-phb4-pec were being created
automatically.  We had a change of heart since then, realizing that
dealing with pnv-phb4-pec is too complicated from the user standpoint.

In theory we could work the code to change chip9->pecs[] to be an array
of pointers and go from there, but in reality this will be a wasted
effort since we're going to backtrack on the user-creatable
pnv-phb4-pec. All PCI Express controllers of all chips will be created
by default. When running with default settings all pnv-phb4 PHBs will be
created, as usual. When running with '-nodefaults' the PECs will be
created without the PHBs, and then the user will be responsible for
adding them by hand in the command line.

Instead of fixing this situation with chip9->pecs[] not being up to date
with each user created pnv-phb4-pec, then work on user creatable pnv-phb4
support, then removing the support for user pnv-phb4-pec, let's remove
user-creatable pnv-phb4-pec right now and spare the extra code.

This reverts commit 7a221a8f6eb04d3e03081b06a89896803554e37d.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/pci-host/pnv_phb4_pec.c | 19 +------------------
 hw/ppc/pnv.c               |  5 ++---
 2 files changed, 3 insertions(+), 21 deletions(-)

diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
index 3797696e8f..aa93ad3f10 100644
--- a/hw/pci-host/pnv_phb4_pec.c
+++ b/hw/pci-host/pnv_phb4_pec.c
@@ -382,17 +382,6 @@ static void pnv_pec_realize(DeviceState *dev, Error **errp)
     char name[64];
     int i;
 
-    /* User created devices */
-    if (!pec->chip) {
-        PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
-
-        pec->chip = pnv_get_chip(pnv, pec->chip_id);
-        if (!pec->chip) {
-            error_setg(errp, "invalid chip id: %d", pec->chip_id);
-            return;
-        }
-    }
-
     if (pec->index >= PNV_CHIP_GET_CLASS(pec->chip)->num_pecs) {
         error_setg(errp, "invalid PEC index: %d", pec->index);
         return;
@@ -400,12 +389,6 @@ static void pnv_pec_realize(DeviceState *dev, Error **errp)
 
     pec->num_stacks = pecc->num_stacks[pec->index];
 
-    /*
-     * Reparent user created devices to the chip to build correctly
-     * the device tree.
-     */
-    pnv_chip_parent_fixup(pec->chip, OBJECT(pec), pec->index);
-
     /* Create stacks */
     for (i = 0; i < pec->num_stacks; i++) {
         PnvPhb4PecStack *stack = &pec->stacks[i];
@@ -538,7 +521,7 @@ static void pnv_pec_class_init(ObjectClass *klass, void 
*data)
 
     dc->realize = pnv_pec_realize;
     device_class_set_props(dc, pnv_pec_properties);
-    dc->user_creatable = true;
+    dc->user_creatable = false;
 
     pecc->xscom_nest_base = pnv_pec_xscom_nest_base;
     pecc->xscom_pci_base  = pnv_pec_xscom_pci_base;
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index c88fef26cf..bf2607446a 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1426,9 +1426,8 @@ static void pnv_chip_power9_instance_init(Object *obj)
 
     object_initialize_child(obj, "homer", &chip9->homer, TYPE_PNV9_HOMER);
 
-    if (defaults_enabled()) {
-        chip->num_pecs = pcc->num_pecs;
-    }
+    /* Number of PECs is the chip default */
+    chip->num_pecs = pcc->num_pecs;
 
     for (i = 0; i < chip->num_pecs; i++) {
         object_initialize_child(obj, "pec[*]", &chip9->pecs[i],
-- 
2.33.1