The PHB4 backend relies on a link with the corresponding PEC element.
This is trivial to do during machine_init() time for default devices,
but not so much for user created ones.
pnv_phb4_get_pec() is a small variation of the function that was
reverted by commit 9c10d86fee "ppc/pnv: Remove user-created PHB{3,4,5}
devices". We'll use it to determine the appropriate PEC for a given user
created pnv-phb that uses a PHB4 backend.
This is done during realize() time, in pnv_phb_user_device_init().
Signed-off-by: Daniel Henrique Barboza <danielhb...@gmail.com>
---
hw/pci-host/pnv_phb.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/hw/pci-host/pnv_phb.c b/hw/pci-host/pnv_phb.c
index 953c384bf6..9807d093f5 100644
--- a/hw/pci-host/pnv_phb.c
+++ b/hw/pci-host/pnv_phb.c
@@ -50,6 +50,34 @@ static void pnv_parent_bus_fixup(DeviceState *parent,
DeviceState *child)
}
}
+static PnvPhb4PecState *pnv_phb4_get_pec(PnvChip *chip, PnvPHB4 *phb,
+ Error **errp)
+{
+ Pnv9Chip *chip9 = PNV9_CHIP(chip);
+ int chip_id = phb->chip_id;
+ int index = phb->phb_id;
+ int i, j;
+
+ for (i = 0; i < chip->num_pecs; i++) {
+ /*
+ * For each PEC, check the amount of phbs it supports
+ * and see if the given phb4 index matches an index.
+ */
+ PnvPhb4PecState *pec = &chip9->pecs[i];
+
+ for (j = 0; j < pec->num_phbs; j++) {
+ if (index == pnv_phb4_pec_get_phb_id(pec, j)) {
+ return pec;
+ }
+ }
+ }
+ error_setg(errp,
+ "pnv-phb4 chip-id %d index %d didn't match any existing PEC",
+ chip_id, index);
+
+ return NULL;
+}
+
/*
* Attach a root port device.
*
@@ -99,6 +127,17 @@ static void pnv_phb_user_device_init(PnvPHB *phb)
chip8->num_phbs++;
parent = OBJECT(phb->chip);
+ } else {
+ Error *local_err = NULL;
+
+ phb->pec = pnv_phb4_get_pec(chip, PNV_PHB4(phb->backend), &local_err);
+
+ if (local_err) {
+ error_propagate(&error_fatal, local_err);
+ return;
+ }
+
+ parent = OBJECT(phb->pec);
}
/*
--
2.36.1
