Merge tag 'pull-ppc-20230303' of https://gitlab.com/danielhb/qemu into staging

ppc patch queue for 2023-03-03:

This queue includes a stub implementation for the dcblc instruction to
avoid an illegal instrunction exception when using u-boot with mpc85xx.
It also includes a PHB fix with user-created pnv-phb devices and
Skiboot.

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* tag 'pull-ppc-20230303' of https://gitlab.com/danielhb/qemu:
  pnv_phb4_pec: Simplify/align code to parent user-created PHBs
  pnv_phb4_pec: Move pnv_phb4_get_pec() to rightful file
  pnv_phb4_pec: Only export existing PHBs to the device tree
  pnv_phb4_pec: Keep track of instantiated PHBs
  target/ppc/translate: Add dummy implementation for dcblc instruction

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 54 insertions, 7 deletions

diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
index 43267a428f..3b2850f7a3 100644
--- a/hw/pci-host/pnv_phb4_pec.c
+++ b/hw/pci-host/pnv_phb4_pec.c
@@ -112,9 +112,50 @@ static const MemoryRegionOps pnv_pec_pci_xscom_ops = {
     .endianness = DEVICE_BIG_ENDIAN,
 };
 
-static void pnv_pec_default_phb_realize(PnvPhb4PecState *pec,
-                                        int stack_no,
-                                        Error **errp)
+PnvPhb4PecState *pnv_pec_add_phb(PnvChip *chip, PnvPHB *phb, Error **errp)
+{
+    PnvPhb4PecState *pecs = NULL;
+    int chip_id = phb->chip_id;
+    int index = phb->phb_id;
+    int i, j;
+
+    if (phb->version == 4) {
+        Pnv9Chip *chip9 = PNV9_CHIP(chip);
+
+        pecs = chip9->pecs;
+    } else if (phb->version == 5) {
+        Pnv10Chip *chip10 = PNV10_CHIP(chip);
+
+        pecs = chip10->pecs;
+    } else {
+        g_assert_not_reached();
+    }
+
+    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 = &pecs[i];
+
+        for (j = 0; j < pec->num_phbs; j++) {
+            if (index == pnv_phb4_pec_get_phb_id(pec, j)) {
+                pec->phbs[j] = phb;
+                phb->pec = pec;
+                return pec;
+            }
+        }
+    }
+    error_setg(errp,
+               "pnv-phb4 chip-id %d index %d didn't match any existing PEC",
+               chip_id, index);
+
+    return NULL;
+}
+
+static PnvPHB *pnv_pec_default_phb_realize(PnvPhb4PecState *pec,
+                                           int stack_no,
+                                           Error **errp)
 {
     PnvPHB *phb = PNV_PHB(qdev_new(TYPE_PNV_PHB));
     int phb_id = pnv_phb4_pec_get_phb_id(pec, stack_no);
@@ -128,8 +169,9 @@ static void pnv_pec_default_phb_realize(PnvPhb4PecState *pec,
                             &error_fatal);
 
     if (!sysbus_realize(SYS_BUS_DEVICE(phb), errp)) {
-        return;
+        return NULL;
     }
+    return phb;
 }
 
 static void pnv_pec_realize(DeviceState *dev, Error **errp)
@@ -148,8 +190,9 @@ static void pnv_pec_realize(DeviceState *dev, Error **errp)
 
     /* Create PHBs if running with defaults */
     if (defaults_enabled()) {
+        g_assert(pec->num_phbs <= MAX_PHBS_PER_PEC);
         for (i = 0; i < pec->num_phbs; i++) {
-            pnv_pec_default_phb_realize(pec, i, errp);
+            pec->phbs[i] = pnv_pec_default_phb_realize(pec, i, errp);
         }
     }
 
@@ -197,9 +240,12 @@ static int pnv_pec_dt_xscom(PnvXScomInterface *dev, void *fdt,
                       pecc->compat_size)));
 
     for (i = 0; i < pec->num_phbs; i++) {
-        int phb_id = pnv_phb4_pec_get_phb_id(pec, i);
         int stk_offset;
 
+        if (!pec->phbs[i]) {
+            continue;
+        }
+
         name = g_strdup_printf("stack@%x", i);
         stk_offset = fdt_add_subnode(fdt, offset, name);
         _FDT(stk_offset);
@@ -207,7 +253,8 @@ static int pnv_pec_dt_xscom(PnvXScomInterface *dev, void *fdt,
         _FDT((fdt_setprop(fdt, stk_offset, "compatible", pecc->stk_compat,
                           pecc->stk_compat_size)));
         _FDT((fdt_setprop_cell(fdt, stk_offset, "reg", i)));
-        _FDT((fdt_setprop_cell(fdt, stk_offset, "ibm,phb-index", phb_id)));
+        _FDT((fdt_setprop_cell(fdt, stk_offset, "ibm,phb-index",
+                               pec->phbs[i]->phb_id)));
     }
 
     return 0;