Changeset 17328 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Mar 4, 2009 9:00:34 AM (16 years ago)

Author:

vboxsync

Message:

Deal with failed VINF_EM_RAW_EMULATE_IO_BLOCK attempts. Pointless to go back to ring 3.

File:

• trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp

@@ -1393 +1393 @@
             STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Write));
 #endif
+#ifdef IN_RING0
+        if (    rc == VINF_EM_RAW_EMULATE_IO_BLOCK
+            &&  !HWACCMCanEmulateIoBlock(pVM))
+        {
+            /* Failed io emulation block attempt; just retry (a switch to ring 3 would jump right back) */
+# ifdef VBOX_WITH_STATISTICS
+            STAM_PROFILE_ADV_START(&pStats->CTX_SUFF_Z(ProfWrite), a);
+            STAM_COUNTER_INC(&pStats->IOEmulateFailedR0);
+# endif
+            int rc = pRange->CTX_SUFF(pfnWriteCallback)(pRange->CTX_SUFF(pDevIns), pRange->CTX_SUFF(pvUser), GCPhys, &u32Value, (unsigned)cbValue);
+# ifdef VBOX_WITH_STATISTICS
+            STAM_PROFILE_ADV_STOP(&pStats->CTX_SUFF_Z(ProfWrite), a);
+            if (rc != VINF_IOM_HC_MMIO_WRITE)
+                STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Write));
+# endif
+        }
+#endif
         Log4(("IOMMMIOWrite: GCPhys=%RGp u32=%08RX32 cb=%d rc=%Rrc\n", GCPhys, u32Value, cbValue, rc));
         return rc;