[Xen-changelog] No need for save_segments() on HVM 64b guest.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID e8d04411931640322013a1f97726ce64137e94ce
# Parent  991c4d62d3928720f690ebd27aa1e5cd606d0e7c
No need for save_segments() on HVM 64b guest.

Signed-off-by: Yunhong Jiang <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>

diff -r 991c4d62d392 -r e8d044119316 xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c     Tue Feb 21 17:15:49 2006
+++ b/xen/arch/x86/domain.c     Tue Feb 21 17:19:16 2006
@@ -610,9 +610,6 @@
     struct cpu_user_regs      *regs = &ctxt->user_regs;
     unsigned int dirty_segment_mask = 0;
 
-    if ( HVM_DOMAIN(v) )
-        hvm_save_segments(v);
-
     regs->ds = read_segment_register(ds);
     regs->es = read_segment_register(es);
     regs->fs = read_segment_register(fs);
@@ -682,9 +679,15 @@
                stack_regs,
                CTXT_SWITCH_STACK_BYTES);
         unlazy_fpu(p);
-        save_segments(p);
-        if ( HVM_DOMAIN(p) )
+        if ( !HVM_DOMAIN(p) )
+        {
+            save_segments(p);
+        }
+        else
+        {
+            hvm_save_segments(v);
             hvm_load_msrs();
+        }
     }
 
     if ( !is_idle_vcpu(n) )

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