tree 167f9f75636769efdc9fa9dd32883b5c780a4c12
parent 1d6ad2073e5354912291277c606a57fd37330f04
author Avi Kivity <avi@qumranet.com> 1201167851 +0200
committer Avi Kivity <avi@qumranet.com> 1209286397 +0300

KVM: MMU: Decouple mmio from shadow page tables

Currently an mmio guest pte is encoded in the shadow pagetable as a
not-present trapping pte, with the SHADOW_IO_MARK bit set.  However
nothing is ever done with this information, so maintaining it is a
useless complication.

This patch moves the check for mmio to before shadow ptes are instantiated,
so the shadow code is never invoked for ptes that reference mmio.  The code
is simpler, and with future work, can be made to handle mmio concurrently.

Signed-off-by: Avi Kivity <avi@qumranet.com>