1 files changed, 41 insertions, 0 deletions
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 4fbcb038ed..51681f3dbe 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -881,6 +881,46 @@ static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     return ret;
 }
 
+#define H_SIGNAL_SYS_RESET_ALL         -1
+#define H_SIGNAL_SYS_RESET_ALLBUTSELF  -2
+
+static target_ulong h_signal_sys_reset(PowerPCCPU *cpu,
+                                       sPAPRMachineState *spapr,
+                                       target_ulong opcode, target_ulong *args)
+{
+    target_long target = args[0];
+    CPUState *cs;
+
+    if (target < 0) {
+        /* Broadcast */
+        if (target < H_SIGNAL_SYS_RESET_ALLBUTSELF) {
+            return H_PARAMETER;
+        }
+
+        CPU_FOREACH(cs) {
+            PowerPCCPU *c = POWERPC_CPU(cs);
+
+            if (target == H_SIGNAL_SYS_RESET_ALLBUTSELF) {
+                if (c == cpu) {
+                    continue;
+                }
+            }
+            run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
+        }
+        return H_SUCCESS;
+
+    } else {
+        /* Unicast */
+        CPU_FOREACH(cs) {
+            if (cpu->cpu_dt_id == target) {
+                run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
+                return H_SUCCESS;
+            }
+        }
+        return H_PARAMETER;
+    }
+}
+
 typedef struct {
     uint32_t compat_pvr;
     Error *err;
@@ -1097,6 +1137,7 @@ static void hypercall_register_types(void)
     /* hcall-splpar */
     spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
     spapr_register_hypercall(H_CEDE, h_cede);
+    spapr_register_hypercall(H_SIGNAL_SYS_RESET, h_signal_sys_reset);
 
     /* processor register resource access h-calls */
     spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0);