1 files changed, 34 insertions, 6 deletions

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 9300824c2a..aa6a07073d 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -655,13 +655,28 @@ out:
     return ret;
 }
 
+static int spapr_dt_cas_updates(sPAPRMachineState *spapr, void *fdt,
+                                sPAPROptionVector *ov5_updates)
+{
+    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
+    int ret = 0;
+
+    /* Generate ibm,dynamic-reconfiguration-memory node if required */
+    if (spapr_ovec_test(ov5_updates, OV5_DRCONF_MEMORY)) {
+        g_assert(smc->dr_lmb_enabled);
+        ret = spapr_populate_drconf_memory(spapr, fdt);
+    }
+
+    return ret;
+}
+
 int spapr_h_cas_compose_response(sPAPRMachineState *spapr,
                                  target_ulong addr, target_ulong size,
-                                 bool cpu_update)
+                                 bool cpu_update,
+                                 sPAPROptionVector *ov5_updates)
 {
     void *fdt, *fdt_skel;
     sPAPRDeviceTreeUpdateHeader hdr = { .version_id = 1 };
-    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(qdev_get_machine());
 
     size -= sizeof(hdr);
 
@@ -680,10 +695,8 @@ int spapr_h_cas_compose_response(sPAPRMachineState *spapr,
         _FDT((spapr_fixup_cpu_dt(fdt, spapr)));
     }
 
-    /* Generate ibm,dynamic-reconfiguration-memory node if required */
-    if (spapr_ovec_test(spapr->ov5_cas, OV5_DRCONF_MEMORY)) {
-        g_assert(smc->dr_lmb_enabled);
-        _FDT((spapr_populate_drconf_memory(spapr, fdt)));
+    if (spapr_dt_cas_updates(spapr, fdt, ov5_updates)) {
+        return -1;
     }
 
     /* Pack resulting tree */
@@ -972,6 +985,13 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
         _FDT((fdt_add_mem_rsv(fdt, spapr->initrd_base, spapr->initrd_size)));
     }
 
+    /* ibm,client-architecture-support updates */
+    ret = spapr_dt_cas_updates(spapr, fdt, spapr->ov5_cas);
+    if (ret < 0) {
+        error_report("couldn't setup CAS properties fdt");
+        exit(1);
+    }
+
     return fdt;
 }
 
@@ -1137,6 +1157,13 @@ static void ppc_spapr_reset(void)
     rtas_addr = rtas_limit - RTAS_MAX_SIZE;
     fdt_addr = rtas_addr - FDT_MAX_SIZE;
 
+    /* if this reset wasn't generated by CAS, we should reset our
+     * negotiated options and start from scratch */
+    if (!spapr->cas_reboot) {
+        spapr_ovec_cleanup(spapr->ov5_cas);
+        spapr->ov5_cas = spapr_ovec_new();
+    }
+
     fdt = spapr_build_fdt(spapr, rtas_addr, spapr->rtas_size);
 
     spapr_load_rtas(spapr, fdt, rtas_addr);
@@ -1164,6 +1191,7 @@ static void ppc_spapr_reset(void)
     first_cpu->halted = 0;
     first_ppc_cpu->env.nip = SPAPR_ENTRY_POINT;
 
+    spapr->cas_reboot = false;
 }
 
 static void spapr_create_nvram(sPAPRMachineState *spapr)