Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-5.1-20200720' into staging

ppc patch queue 20200720

Here are some assorted fixes for qemu-5.1:
 * SLOF update with improved TPM handling, and fix for possible stack
   overflows on many-vcpu machines
 * Fix for NUMA distances on NVLink2 attached GPU memory nodes
 * Fixes to fail more gracefully on attempting to plug unsupported PCI bridge types
 * Don't allow pnv-psi device to be user created

# gpg: Signature made Mon 20 Jul 2020 06:29:21 BST
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-5.1-20200720:
  pseries: Update SLOF firmware image
  spapr: Add a new level of NUMA for GPUs
  spapr_pci: Robustify support of PCI bridges
  ppc/pnv: Make PSI device types not user creatable

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

4 files changed, 86 insertions, 5 deletions

diff --git a/hw/ppc/pnv_psi.c b/hw/ppc/pnv_psi.c
index 5bdeec700e..6a479cac53 100644
--- a/hw/ppc/pnv_psi.c
+++ b/hw/ppc/pnv_psi.c
@@ -929,6 +929,7 @@ static void pnv_psi_class_init(ObjectClass *klass, void *data)
     dc->desc = "PowerNV PSI Controller";
     device_class_set_props(dc, pnv_psi_properties);
     dc->reset = pnv_psi_reset;
+    dc->user_creatable = false;
 }
 
 static const TypeInfo pnv_psi_info = {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 299908cc73..0ae293ec94 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -890,10 +890,16 @@ static int spapr_dt_rng(void *fdt)
 static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
 {
     MachineState *ms = MACHINE(spapr);
+    SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
     int rtas;
     GString *hypertas = g_string_sized_new(256);
     GString *qemu_hypertas = g_string_sized_new(256);
-    uint32_t refpoints[] = { cpu_to_be32(0x4), cpu_to_be32(0x4) };
+    uint32_t refpoints[] = {
+        cpu_to_be32(0x4),
+        cpu_to_be32(0x4),
+        cpu_to_be32(0x2),
+    };
+    uint32_t nr_refpoints = ARRAY_SIZE(refpoints);
     uint64_t max_device_addr = MACHINE(spapr)->device_memory->base +
         memory_region_size(&MACHINE(spapr)->device_memory->mr);
     uint32_t lrdr_capacity[] = {
@@ -945,8 +951,12 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
                      qemu_hypertas->str, qemu_hypertas->len));
     g_string_free(qemu_hypertas, TRUE);
 
+    if (smc->pre_5_1_assoc_refpoints) {
+        nr_refpoints = 2;
+    }
+
     _FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
-                     refpoints, sizeof(refpoints)));
+                     refpoints, nr_refpoints * sizeof(refpoints[0])));
 
     _FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
                      maxdomains, sizeof(maxdomains)));
@@ -4584,9 +4594,16 @@ DEFINE_SPAPR_MACHINE(5_1, "5.1", true);
  */
 static void spapr_machine_5_0_class_options(MachineClass *mc)
 {
+    SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
+    static GlobalProperty compat[] = {
+        { TYPE_SPAPR_PCI_HOST_BRIDGE, "pre-5.1-associativity", "on" },
+    };
+
     spapr_machine_5_1_class_options(mc);
     compat_props_add(mc->compat_props, hw_compat_5_0, hw_compat_5_0_len);
+    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
     mc->numa_mem_supported = true;
+    smc->pre_5_1_assoc_refpoints = true;
 }
 
 DEFINE_SPAPR_MACHINE(5_0, "5.0", false);
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 2a6a48744a..363cdb3f7b 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1480,6 +1480,57 @@ static void spapr_pci_bridge_plug(SpaprPhbState *phb,
     add_drcs(phb, bus);
 }
 
+/* Returns non-zero if the value of "chassis_nr" is already in use */
+static int check_chassis_nr(Object *obj, void *opaque)
+{
+    int new_chassis_nr =
+        object_property_get_uint(opaque, "chassis_nr", &error_abort);
+    int chassis_nr =
+        object_property_get_uint(obj, "chassis_nr", NULL);
+
+    if (!object_dynamic_cast(obj, TYPE_PCI_BRIDGE)) {
+        return 0;
+    }
+
+    /* Skip unsupported bridge types */
+    if (!chassis_nr) {
+        return 0;
+    }
+
+    /* Skip self */
+    if (obj == opaque) {
+        return 0;
+    }
+
+    return chassis_nr == new_chassis_nr;
+}
+
+static bool bridge_has_valid_chassis_nr(Object *bridge, Error **errp)
+{
+    int chassis_nr =
+        object_property_get_uint(bridge, "chassis_nr", NULL);
+
+    /*
+     * slotid_cap_init() already ensures that "chassis_nr" isn't null for
+     * standard PCI bridges, so this really tells if "chassis_nr" is present
+     * or not.
+     */
+    if (!chassis_nr) {
+        error_setg(errp, "PCI Bridge lacks a \"chassis_nr\" property");
+        error_append_hint(errp, "Try -device pci-bridge instead.\n");
+        return false;
+    }
+
+    /* We want unique values for "chassis_nr" */
+    if (object_child_foreach_recursive(object_get_root(), check_chassis_nr,
+                                       bridge)) {
+        error_setg(errp, "Bridge chassis %d already in use", chassis_nr);
+        return false;
+    }
+
+    return true;
+}
+
 static void spapr_pci_plug(HotplugHandler *plug_handler,
                            DeviceState *plugged_dev, Error **errp)
 {
@@ -1508,6 +1559,9 @@ static void spapr_pci_plug(HotplugHandler *plug_handler,
     g_assert(drc);
 
     if (pc->is_bridge) {
+        if (!bridge_has_valid_chassis_nr(OBJECT(plugged_dev), errp)) {
+            return;
+        }
         spapr_pci_bridge_plug(phb, PCI_BRIDGE(plugged_dev));
     }
 
@@ -2035,6 +2089,8 @@ static Property spapr_phb_properties[] = {
                      pcie_ecs, true),
     DEFINE_PROP_UINT64("gpa", SpaprPhbState, nv2_gpa_win_addr, 0),
     DEFINE_PROP_UINT64("atsd", SpaprPhbState, nv2_atsd_win_addr, 0),
+    DEFINE_PROP_BOOL("pre-5.1-associativity", SpaprPhbState,
+                     pre_5_1_assoc, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c
index dd8cd6db96..76ae77ebc8 100644
--- a/hw/ppc/spapr_pci_nvlink2.c
+++ b/hw/ppc/spapr_pci_nvlink2.c
@@ -362,9 +362,9 @@ void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt)
                                                     &error_abort);
         uint32_t associativity[] = {
             cpu_to_be32(0x4),
-            SPAPR_GPU_NUMA_ID,
-            SPAPR_GPU_NUMA_ID,
-            SPAPR_GPU_NUMA_ID,
+            cpu_to_be32(nvslot->numa_id),
+            cpu_to_be32(nvslot->numa_id),
+            cpu_to_be32(nvslot->numa_id),
             cpu_to_be32(nvslot->numa_id)
         };
         uint64_t size = object_property_get_uint(nv_mrobj, "size", NULL);
@@ -375,6 +375,13 @@ void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt)
         _FDT(off);
         _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
         _FDT((fdt_setprop(fdt, off, "reg", mem_reg, sizeof(mem_reg))));
+
+        if (sphb->pre_5_1_assoc) {
+            associativity[1] = SPAPR_GPU_NUMA_ID;
+            associativity[2] = SPAPR_GPU_NUMA_ID;
+            associativity[3] = SPAPR_GPU_NUMA_ID;
+        }
+
         _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
                           sizeof(associativity))));