[Xen-changelog] [xen master] x86/hvm: explicitly mark ioreq server pages dirty

[patchbot@xxxxxxx]

commit 70f691130081324a8efb97b23c504d8abc5421db
Author:     Paul Durrant <paul.durrant@xxxxxxxxxx>
AuthorDate: Tue Feb 10 13:29:51 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Feb 10 13:29:51 2015 +0100

    x86/hvm: explicitly mark ioreq server pages dirty
    
    ...when they are added back into the guest physmap, when an ioreq
    server is disabled. If this is not done then the pages are missed
    during migration, causing ioreq server creation to fail on the remote end.
    
    This problem only manifests if the ioreq server is non-default because in
    the default case the pages are never removed from the guest physmap.
    
    Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 952f965..6368768 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -543,9 +543,16 @@ static void hvm_remove_ioreq_gmfn(
 static int hvm_add_ioreq_gmfn(
     struct domain *d, struct hvm_ioreq_page *iorp)
 {
+    int rc;
+
     clear_page(iorp->va);
-    return guest_physmap_add_page(d, iorp->gmfn,
-                                  page_to_mfn(iorp->page), 0);
+
+    rc = guest_physmap_add_page(d, iorp->gmfn,
+                                page_to_mfn(iorp->page), 0);
+    if ( rc == 0 )
+        paging_mark_dirty(d, page_to_mfn(iorp->page));
+
+    return rc;
 }
 
 static int hvm_print_line(
--
generated by git-patchbot for /home/xen/git/xen.git#master

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog