Changeset 74606 in vbox for trunk

Timestamp:

Oct 4, 2018 9:01:40 AM (6 years ago)

Author:

vboxsync

Message:

NEM/win: Some more details. bugref:9044

File:

trunk/src/VBox/VMM/VMMR3/NEMR3Native-win.cpp

-              r74600
+              r74606
+ *
  * Clearing bit 20 in nt!KiSpeculationFeatures speeds things up (i.e. changing
+ * the dword from 0x00300065 to 0x00200065 in windbg).
+ * the dword from 0x00300065 to 0x00200065 in windbg).  This is checked by
+ * nt!KePrepareToDispatchVirtualProcessor, making it a no-op if the flag is
+ * clear.  winhvr!WinHvpVpDispatchLoop call that function before making
+ * hypercall 0xc2, which presumably does the heavy VCpu lifting in hvcax64.exe.
+ *
  * @verbatim

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