From: Jan Beulich <JBeulich@suse.com>
Date: Wed, 23 Apr 2014 06:47:30 +0000 (+0100)
Subject: x86/EPT: fix super page splitting when resolving EPT_MISCONFIG VM exits
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~5140
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c7ee02d23fde573f0bb145610c984b64d71d20cb;p=xen.git

x86/EPT: fix super page splitting when resolving EPT_MISCONFIG VM exits

Reported-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
---

diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index 8d3051bf53..5d1996569e 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -353,6 +353,7 @@ bool_t ept_handle_misconfig(uint64_t gpa)
                 {
                     if ( ept_split_super_page(p2m, &e, level, level - 1) )
                     {
+                        atomic_write_ept_entry(&epte[i], e);
                         unmap_domain_page(epte);
                         mfn = e.mfn;
                         continue;