Changeset 21039 in vbox for trunk

Timestamp:

Jun 29, 2009 3:57:39 PM (16 years ago)

Author:

vboxsync

Message:

Prevent bouncing right back to ring 3.

Location:

trunk/src/VBox/VMM

Files:

• PDMQueue.cpp (modified) (2 diffs)
• VMMR0/CPUMR0A.asm (modified) (2 diffs)

trunk/src/VBox/VMM/PDMQueue.cpp

@@ -629 +629 @@
     VM_FF_CLEAR(pVM, VM_FF_PDM_QUEUES);
 
+check_queue:
     /* Prevent other VCPUs from flushing queues at the same time; we'll never flush an item twice, but the order might change. */
     if (ASMAtomicCmpXchgU32(&pVM->pdm.s.fQueueFlushing, 1, 0))
@@ -664 +665 @@
             }
         }
+        if (VM_FF_TESTANDCLEAR(pVM, VM_FF_PDM_QUEUES))
+            goto check_queue;
+           
     }
 }

trunk/src/VBox/VMM/VMMR0/CPUMR0A.asm

@@ -170 +170 @@
     mov     cr0, xAX                    ;; @todo optimize this.
 
-    fxsave  [xDX + CPUMCPU.Host.fpu]    ; ASSUMES that all VT-x/AMD-V boxes sports fxsave/fxrstor (safe assumption)
+    fxsave  [xDX + CPUMCPU.Host.fpu]    ; ASSUMES that all VT-x/AMD-V boxes support fxsave/fxrstor (safe assumption)
 
     mov     cr0, xCX                    ; and restore old CR0 again ;; @todo optimize this.
@@ -221 +221 @@
 %endif ; VBOX_WITH_HYBRID_32BIT_KERNEL
 
-    fxsave  [xDX + CPUMCPU.Guest.fpu]   ; ASSUMES that all VT-x/AMD-V boxes sports fxsave/fxrstor (safe assumption)
+    fxsave  [xDX + CPUMCPU.Guest.fpu]   ; ASSUMES that all VT-x/AMD-V boxes support fxsave/fxrstor (safe assumption)
     fxrstor [xDX + CPUMCPU.Host.fpu]