From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Egger <Christoph.Egger@amd.com>
Subject: [PATCH] nestedsvm: fix interrupt handling
Date: Fri, 31 Aug 2012 11:16:53 +0200
Message-ID: <50408105.3020502@amd.com>
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="------------060908090801080904070009"
Return-path: <xen-devel-bounces@lists.xen.org>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
List-Id: xen-devel@lists.xenproject.org

--------------060908090801080904070009
Content-Type: text/plain; charset="ISO-8859-15"
Content-Transfer-Encoding: 7bit

Give the l2 guest a chance to finish the delivery of the last injected
interrupt or exception before we emulate a VMEXIT.
For example after a NPF handled by the host there can be an interrupt
for the l1 guest.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>


-- 
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85689 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

--------------060908090801080904070009
Content-Type: text/plain; charset="us-ascii"; name="xen_nh_intr.diff"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="xen_nh_intr.diff"
Content-Description: xen_nh_intr.diff

diff -r a0b5f8102a00 xen/arch/x86/hvm/svm/nestedsvm.c
--- a/xen/arch/x86/hvm/svm/nestedsvm.c	Tue Aug 28 22:40:45 2012 +0100
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c	Fri Aug 31 11:09:37 2012 +0200
@@ -1164,6 +1164,8 @@ enum hvm_intblk nsvm_intr_blocked(struct
         return hvm_intblk_svm_gif;
 
     if ( nestedhvm_vcpu_in_guestmode(v) ) {
+        struct vmcb_struct *n2vmcb = nv->nv_n2vmcx;
+
         if ( svm->ns_hostflags.fields.vintrmask )
             if ( !svm->ns_hostflags.fields.rflagsif )
                 return hvm_intblk_rflags_ie;
@@ -1176,6 +1178,14 @@ enum hvm_intblk nsvm_intr_blocked(struct
          */
         if ( v->arch.hvm_vcpu.hvm_io.io_state != HVMIO_none )
             return hvm_intblk_shadow;
+
+        if ( !nv->nv_vmexit_pending && n2vmcb->exitintinfo.bytes != 0 ) {
+            /* Give the l2 guest a chance to finish the delivery of
+             * the last injected interrupt or exception before we
+             * emulate a VMEXIT (e.g. VMEXIT(INTR) ).
+             */
+            return hvm_intblk_shadow;
+        }
     }
 
     if ( nv->nv_vmexit_pending ) {

--------------060908090801080904070009
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

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

--------------060908090801080904070009--