Changeset 61556 in vbox

Timestamp:

Jun 8, 2016 7:52:27 AM (9 years ago)

Author:

vboxsync

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

107895

Message:

VMM/APIC: Comment.

File:

• trunk/src/VBox/VMM/VMMR3/APIC.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR3/APIC.cpp

@@ -163 +163 @@
      * See Intel spec. 10.4.7.3 "Local APIC State After an INIT Reset (Wait-for-SIPI State)"
      * and AMD spec 16.3.2 "APIC Registers".
+     *
+     * The reason we don't simply zero out the entire APIC page and only set the non-zero members
+     * is because there are some registers that are not touched by the INIT IPI (e.g. version)
+     * operation and this function is only a subset of the reset operation.
      */
     RT_ZERO(pXApicPage->irr);