Changeset 49270 in vbox for trunk/src/VBox/VMM

Timestamp:

Oct 24, 2013 9:15:49 AM (11 years ago)

Author:

vboxsync

Message:

VMM/HMVMXR0: Fix incorrect masking of TPR bits with TPR-shadowing.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -3013 +3013 @@
             if (fPendingIntr)
             {
-                /* Bits 3-0 of the TPR threshold field correspond to bits 7-4 of the TPR (which is the Task-Priority Class). */
-                const uint8_t u8PendingPriority = (u8PendingIntr >> 4);
-                const uint8_t u8TprPriority     = (u8Tpr >> 4) & 7;
+                /* Bits 3:0 of the TPR threshold field correspond to bits 7:4 of the TPR (which is the Task-Priority Class). */
+                const uint8_t u8PendingPriority = (u8PendingIntr >> 4) & 0xf;
+                const uint8_t u8TprPriority     = (u8Tpr >> 4) & 0xf;
                 if (u8PendingPriority <= u8TprPriority)
                     u32TprThreshold = u8PendingPriority;