儲存庫 vbox 的更動 67587

時間撮記:

2017-6-23 下午04:18:49 (7 年 以前)

作者:

vboxsync

訊息:

DevVGA: Add a few missing checks which skip the VRAM alias mapping to the LFB when the PCI BAR isn't set up (i.e. the LFB physical address is 0, conflicting with system RAM). Performance is very bad in this case, but it's not an expected use case to have incorrectly initialized BARs.

檔案:

• trunk/src/VBox/Devices/Graphics/DevVGA.cpp (修改) (3 筆差異)

trunk/src/VBox/Devices/Graphics/DevVGA.cpp

@@ -1240 +1240 @@
         /* If all planes are accessible, then map the page to the frame buffer and make it writable. */
         if (   (pThis->sr[2] & 3) == 3
-            && !vga_is_dirty(pThis, addr))
+            && !vga_is_dirty(pThis, addr)
+            && pThis->GCPhysVRAM)
         {
             /** @todo only allow read access (doesn't work now) */
@@ -1345 +1346 @@
             /* If all planes are accessible, then map the page to the frame buffer and make it writable. */
             if (   (pThis->sr[2] & 3) == 3
-                && !vga_is_dirty(pThis, addr))
+                && !vga_is_dirty(pThis, addr)
+                && pThis->GCPhysVRAM)
             {
                 STAM_COUNTER_INC(&pThis->StatMapPage);
@@ -5816 +5818 @@
 
     /*
-     * Reset the LBF mapping.
+     * Reset the LFB mapping.
      */
     pThis->fLFBUpdated = false;