Changeset 847 in vbox for trunk/src/VBox/VMM/VMMGC/VMMGC.cpp

Timestamp:

Feb 12, 2007 1:46:39 PM (18 years ago)

Author:

vboxsync

Message:

Interrupt masking testcase. (attempt at debugging amd64 issue)

File:

• trunk/src/VBox/VMM/VMMGC/VMMGC.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMGC/VMMGC.cpp

@@ -28 +28 @@
 #include "VMMInternal.h"
 #include <VBox/vm.h>
+#include <VBox/sup.h>
 #include <VBox/err.h>
 #include <VBox/log.h>
@@ -94 +95 @@
 
         /*
+         * Delay for ~100us.
+         */
+        case VMMGC_DO_TESTCASE_INTERRUPT_MASKING:
+        {
+            uint64_t u64MaxTicks = (g_pSUPGlobalInfoPage ? g_pSUPGlobalInfoPage->u64CpuHz : _2G) / 10000;
+            uint64_t u64StartTSC = ASMReadTSC();
+            uint64_t u64TicksNow;
+            uint32_t volatile i = 0;
+
+            do
+            {
+                /* waste some time and protect against getting stuck. */
+                for (uint32_t volatile j = 0; j < 1000; j++, i++)
+                    if (i > _2G32)
+                        return VERR_GENERAL_FAILURE;
+
+                /* check if we're done.*/
+                u64TicksNow = ASMReadTSC() - u64StartTSC;
+            } while (u64TicksNow < u64MaxTicks);
+
+            return VINF_SUCCESS;
+        }
+
+        /*
          * Trap testcases and unknown operations.
          */