usb hubs, hotplug support, unplug support, saving log files to disk, smt

code/kernel/kmain.c

@@ -341,7 +341,7 @@ void SystemInitThread(void* arg) {
     KiResolveSystemImports(args->bootInfo);
     KiReclaimBootloaderMemory(args->bootInfo);
 
-    if (args->bootInfo->Debug & 2)
+    if (args->bootInfo->Debug & KE_DEBUG_SELFTEST)
         KiRunKernelSelfTests(args->hal);
 
     // Launch User-Mode init.exe and restart it until it exits cleanly.
@@ -363,6 +363,11 @@ void SystemInitThread(void* arg) {
     }
 
     DbgPrint("SystemInitThread: init.exe completed successfully; shutting down.\n");
+    if (args->bootInfo->Debug & (KE_DEBUG_CONSOLE | KE_DEBUG_FILE_LOG)) {
+        KSTATUS logStatus = KeFlushDebugLogToFile(SYS_SV_LITERAL("0:/kernel.log"));
+        if (!KSUCCESS(logStatus))
+            DbgPrint("debuglog: shutdown flush to 0:/kernel.log failed st=0x%x\n", logStatus);
+    }
     gKmainHal->Power.Shutdown();
     MmFreePool(args);
 }
@@ -416,7 +421,7 @@ extern void KernelMain(BOOT_INFO* bootInfo) {
     const HAL_API* hal = HalGetApi();
     gKmainHal = hal;
 
-    KeInitDebug(hal->Screen.PrintChar, bootInfo->Debug & 1);
+    KeInitDebug(hal->Screen.PrintChar, bootInfo->Debug);
 
     // CPU startup intentionally lives after HAL initialization but before IRQs
     // and scheduler startup. HAL owns ACPI/MADT discovery and LAPIC INIT/SIPI;