kern: simplify global rng initialization

libraries/libmesosphere/source/kern_main.cpp

@@ -49,6 +49,9 @@ namespace ams::kern {
             /* Initialize the carveout and the system resource limit. */
             KSystemControl::InitializePhase1();
 
+            /* Synchronize all cores before proceeding, to ensure access to the global rng is consistent. */
+            cpu::SynchronizeAllCores();
+
             /* Initialize the memory manager and the KPageBuffer slabheap. */
             {
                 const auto &management_region = KMemoryLayout::GetPoolManagementRegion();
@@ -74,6 +77,9 @@ namespace ams::kern {
 
                 Kernel::InitializeResourceManagers(pt_heap_region.GetAddress(), pt_heap_region.GetSize());
             }
+        } else {
+            /* Synchronize all cores before proceeding, to ensure access to the global rng is consistent. */
+            cpu::SynchronizeAllCores();
         }
 
         /* Initialize the supervisor page table for each core. */