From: Wei Liu <wei.liu2@citrix.com>
Date: Fri, 24 Mar 2017 11:34:01 +0000 (+0000)
Subject: x86/mm: fix the check in get_pg_owner
X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~2406
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=0e7ffe9604ecd3bf534e0d224025e516f2cbd209;p=xen.git

x86/mm: fix the check in get_pg_owner

PVH (both v1 and v2) guest is actually an translated guest. It should be
able to manipulate page table for other domains when acting as Dom0.

The removal of PVHv1 deleted the special case for PVH guest but didn't
add a check for HVM guest.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index a6b2649cda..4dbd24ff87 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -3041,7 +3041,7 @@ static struct domain *get_pg_owner(domid_t domid)
         goto out;
     }
 
-    if ( unlikely(paging_mode_translate(curr)) )
+    if ( !is_hvm_domain(curr) && unlikely(paging_mode_translate(curr)) )
     {
         MEM_LOG("Cannot mix foreign mappings with translated domains");
         goto out;