vbox的更動 90638 路徑 trunk/src/VBox/VMM/include/IOMInternal.h

時間撮記:

2021-8-11 下午09:35:56 (4 年 以前)

作者:

vboxsync

svn:sync-xref-src-repo-rev:

146250

訊息:

VMM,VMMDev: Force 32-byte alignment of PDMCRITSECTRW so all members that are being updated atomically are in the same cacheline. This also ensures that the 128-bit union is correctly aligned. bugref:6695

檔案:

• trunk/src/VBox/VMM/include/IOMInternal.h (修改) (3 筆差異)

trunk/src/VBox/VMM/include/IOMInternal.h

@@ -384 +384 @@
 typedef struct IOM
 {
+    /** Lock serializing EMT access to IOM. */
+#ifdef IOM_WITH_CRIT_SECT_RW
+    PDMCRITSECTRW                   CritSect;
+#else
+    PDMCRITSECT                     CritSect;
+#endif
+
     /** @name I/O ports
      * @note The updating of these variables is done exclusively from EMT(0).
@@ -438 +445 @@
     /** @} */
 
-
-    /** Lock serializing EMT access to IOM. */
-#ifdef IOM_WITH_CRIT_SECT_RW
-    PDMCRITSECTRW                   CritSect;
-#else
-    PDMCRITSECT                     CritSect;
-#endif
-
     /** @name I/O Port statistics.
      * @{ */
@@ -470 +469 @@
     /** @} */
 } IOM;
+#ifdef IOM_WITH_CRIT_SECT_RW
+AssertCompileMemberAlignment(IOM, CritSect, 32);
+#endif
 /** Pointer to IOM instance data. */
 typedef IOM *PIOM;