[XEN] VCPU operation register_runstate should work even when

called from non-local VCPU. Necessary as Linux always calls
this operation from VCPU0 during secondary-VCPU bringup.
Signed-off-by: Keir Fraser <keir@xensource.com>

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 189095691699e8a206dde8d2d599a4a661c7ca1d..b4ad1a7a811d27ad4c65fe2ae4ce8e4a3784f8d0 100644 (file)
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -377,10 +377,6 @@ arch_do_vcpu_op(
     {
         struct vcpu_register_runstate_memory_area area;
 
-        rc = -EINVAL;
-        if ( v != current )
-            break;
-
         rc = -EFAULT;
         if ( copy_from_guest(&area, arg, 1) )
             break;
@@ -390,7 +386,10 @@ arch_do_vcpu_op(
 
         rc = 0;
         v->runstate_guest = area.addr.v;
-        __copy_to_user(v->runstate_guest, &v->runstate, sizeof(v->runstate));
+
+        if ( v == current )
+            __copy_to_user(v->runstate_guest, &v->runstate,
+                           sizeof(v->runstate));
 
         break;
     }