Changeset 69932 in vbox for trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp

Timestamp:

Dec 5, 2017 10:21:22 AM (7 years ago)

Author:

vboxsync

Message:

VMM/HMSVMR0: Comment.

File:

• trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMSVMR0.cpp

@@ -1004 +1004 @@
      * Force a TLB flush for the first world switch if the current CPU differs from the one we ran on last.
      * This can happen both for start & resume due to long jumps back to ring-3.
+     *
+     * We also force a TLB flush every time when executing a nested-guest VCPU as there is no correlation
+     * between it and the physical CPU.
+     *
      * If the TLB flush count changed, another VM (VCPU rather) has hit the ASID limit while flushing the TLB,
      * so we cannot reuse the ASIDs without flushing.