From 9b51a63024bd759f97a12f50907b8af23b065b36 Mon Sep 17 00:00:00 2001
From: Kai Huang <kai.huang@linux.intel.com>
Date: Wed, 28 Jan 2015 10:54:25 +0800
Subject: [PATCH] KVM: MMU: Explicitly set D-bit for writable spte.

This patch avoids unnecessary dirty GPA logging to PML buffer in EPT violation
path by setting D-bit manually prior to the occurrence of the write from guest.

We only set D-bit manually in set_spte, and leave fast_page_fault path
unchanged, as fast_page_fault is very unlikely to happen in case of PML.

For the hva <-> pa change case, the spte is updated to either read-only (host
pte is read-only) or be dropped (host pte is writeable), and both cases will be
handled by above changes, therefore no change is necessary.

Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
Reading git-format-patch failed