[Xen-ia64-devel] [PATCH] fix vtlb flush

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

Live migration with uninitialized vcpu will crash xen by null pointer.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>

diff -r d24bc5f549ba xen/arch/ia64/vmx/vtlb.c
--- a/xen/arch/ia64/vmx/vtlb.c  Mon Aug 11 11:04:52 2008 +0900
+++ b/xen/arch/ia64/vmx/vtlb.c  Wed Aug 13 10:50:00 2008 +0900
@@ -633,6 +633,9 @@ static void __thash_purge_all(void *arg)
 
 void vmx_vcpu_flush_vtlb_all(VCPU *v)
 {
+    if (!v->is_initialised)
+        return;
+
     if (v == current) {
         thash_purge_all(v);
         return;
diff -r d24bc5f549ba xen/arch/ia64/xen/vhpt.c
--- a/xen/arch/ia64/xen/vhpt.c  Mon Aug 11 11:04:52 2008 +0900
+++ b/xen/arch/ia64/xen/vhpt.c  Wed Aug 13 10:21:45 2008 +0900
@@ -526,6 +526,8 @@ void flush_tlb_for_log_dirty(struct doma
        /* NB. There is no race because all vcpus are paused. */
        if (is_hvm_domain(d)) {
                for_each_vcpu (d, v) {
+                       if (!v->is_initialised)
+                               continue;
                        /* XXX: local_flush_tlb_all is called redundantly */
                        thash_purge_all(v);
                }
@@ -533,6 +535,8 @@ void flush_tlb_for_log_dirty(struct doma
                                        NULL, 1, 1);
        } else if (HAS_PERVCPU_VHPT(d)) {
                for_each_vcpu (d, v) {
+                       if (!v->is_initialised)
+                               continue;
                        vcpu_purge_tr_entry(&PSCBX(v,dtlb));
                        vcpu_purge_tr_entry(&PSCBX(v,itlb));
                        vcpu_vhpt_flush(v);

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel