From patchwork Fri May 29 10:58:48 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ehrhardt@linux.vnet.ibm.com X-Patchwork-Id: 26930 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n4TAxSeM027679 for ; Fri, 29 May 2009 10:59:29 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756496AbZE2K7X (ORCPT ); Fri, 29 May 2009 06:59:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755928AbZE2K7X (ORCPT ); Fri, 29 May 2009 06:59:23 -0400 Received: from mtagate5.de.ibm.com ([195.212.29.154]:39825 "EHLO mtagate5.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754988AbZE2K7X (ORCPT ); Fri, 29 May 2009 06:59:23 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate5.de.ibm.com (8.14.3/8.13.8) with ESMTP id n4TAwpD5806400 for ; Fri, 29 May 2009 10:58:51 GMT Received: from d12av01.megacenter.de.ibm.com (d12av01.megacenter.de.ibm.com [9.149.165.212]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n4TAwpGJ1724444 for ; Fri, 29 May 2009 12:58:51 +0200 Received: from d12av01.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av01.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n4TAwo8G015287 for ; Fri, 29 May 2009 12:58:51 +0200 Received: from localhost.localdomain (dyn-9-152-212-64.boeblingen.de.ibm.com [9.152.212.64]) by d12av01.megacenter.de.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n4TAwofa015281; Fri, 29 May 2009 12:58:50 +0200 From: ehrhardt@linux.vnet.ibm.com To: kvm@vger.kernel.org, avi@redhat.com Cc: ehrhardt@linux.vnet.ibm.com, borntraeger@de.ibm.com, cotte@de.ibm.com, heiko.carstens@de.ibm.com, schwidefsky@de.ibm.com, mtosatti@redhat.com Subject: [PATCH 2/4] kvm-s390: fix interruption caused by signal - v2 Date: Fri, 29 May 2009 12:58:48 +0200 Message-Id: <1243594730-20625-2-git-send-email-ehrhardt@linux.vnet.ibm.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1243594730-20625-1-git-send-email-ehrhardt@linux.vnet.ibm.com> References: <1243594730-20625-1-git-send-email-ehrhardt@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Christian Ehrhardt *updates in v2* merged a small piece of code from patch 1/1 that belongs here themtically If signal pending is true we exit without updating kvm_run, userspace currently just does nothing and jumps to kvm_run again. Since we did not set an exit_reason we might end up with a random one (whatever was the last exit). Therefore it was possible to e.g. jump to the psw position the last real interruption set. Setting the INTR exit reason ensures that no old psw data is swapped in on reentry. Signed-off-by: Christian Ehrhardt --- [diffstat] kvm-s390.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) [diff] -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: kvm/arch/s390/kvm/kvm-s390.c =================================================================== --- kvm.orig/arch/s390/kvm/kvm-s390.c +++ kvm/arch/s390/kvm/kvm-s390.c @@ -509,6 +509,7 @@ rerun_vcpu: vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; break; case KVM_EXIT_UNKNOWN: + case KVM_EXIT_INTR: case KVM_EXIT_S390_RESET: break; default: @@ -525,8 +526,10 @@ rerun_vcpu: if (rc == SIE_INTERCEPT_CHECKREQUESTS) goto rerun_vcpu; - if (signal_pending(current) && !rc) + if (signal_pending(current) && !rc) { + kvm_run->exit_reason = KVM_EXIT_INTR; rc = -EINTR; + } if (rc == -ENOTSUPP) { /* intercept cannot be handled in-kernel, prepare kvm-run */