[Xen-devel] [PATCH 5/5] hvm_complete_assist_req: Tell caller we failed to send

[Don Slutz <dslutz@xxxxxxxxxxx>]

This saves a VMENTRY and a VMEXIT since we not longer retry the
ioport read.

hvmemul_do_io() will retry in order to complete an ioport read when
hvm_send_assist_req() is successful.

Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 6f7b407..bad410e 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -2599,7 +2599,7 @@ static bool_t hvm_complete_assist_req(ioreq_t *p)
         break;
     }
 
-    return 1;
+    return 0; /* implicitly bins the i/o operation */
 }
 
 bool_t hvm_send_assist_req(ioreq_t *p)
-- 
1.8.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel