From patchwork Thu Apr 30 09:44:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 1280115 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=2001:470:142::17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=E3HabDdv; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:470:142::17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49CW3y750kz9sPF for ; Thu, 30 Apr 2020 19:56:14 +1000 (AEST) Received: from localhost ([::1]:45894 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jU5vO-0007gO-LA for incoming@patchwork.ozlabs.org; Thu, 30 Apr 2020 05:56:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49090) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jU5lv-0008Iw-Ej for qemu-devel@nongnu.org; Thu, 30 Apr 2020 05:46:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jU5lu-0005OO-59 for qemu-devel@nongnu.org; Thu, 30 Apr 2020 05:46:23 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:41765 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jU5lt-0005Lt-KN for qemu-devel@nongnu.org; Thu, 30 Apr 2020 05:46:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588239980; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SnonKEFsZXsqPJO9OoSlUnCquChhMgvd7BwtyGpC6YI=; b=E3HabDdvQ/rXhgTQBAV6jnSmBLkCdxYcgR+J3HeoVOpN/1WN+Qc6kAVRhSr0Rr+f0n7l4k 1foQysQiccp2zQi7ftcfDJdhcvP/4hLQOo8cgOoE7DHsrjKuuEvEUpqS1+B18EryhYDTex IAJcS1EmbCLIt8xzfYIS5bizO4VtYWs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-404-T8ehZxabNDWfqZt7LUV7Ag-1; Thu, 30 Apr 2020 05:46:16 -0400 X-MC-Unique: T8ehZxabNDWfqZt7LUV7Ag-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6A1C5835B40; Thu, 30 Apr 2020 09:46:15 +0000 (UTC) Received: from localhost (ovpn-112-226.ams2.redhat.com [10.36.112.226]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 09BEC1C950; Thu, 30 Apr 2020 09:46:14 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Subject: [PULL 19/20] s390x/pv: Retry ioctls on -EINTR Date: Thu, 30 Apr 2020 11:44:44 +0200 Message-Id: <20200430094445.25943-20-cohuck@redhat.com> In-Reply-To: <20200430094445.25943-1-cohuck@redhat.com> References: <20200430094445.25943-1-cohuck@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/30 01:04:40 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Janosch Frank , Cornelia Huck , qemu-devel@nongnu.org, Christian Borntraeger , qemu-s390x@nongnu.org, Marc Hartmayer Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Christian Borntraeger PV_ENABLE (and maybe others) might return -EINTR when a signal is pending. See the Linux kernel patch "s390/gmap: return proper error code on ksm unsharing" for details. Let us retry the ioctl in that case. Fixes: c3347ed0d2ee ("s390x: protvirt: Support unpack facility") Reported-by: Marc Hartmayer Acked-by: Janosch Frank Tested-by: Marc Hartmayer Signed-off-by: Christian Borntraeger Message-Id: <20200327124616.34866-1-borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck --- hw/s390x/pv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c index a40a8448060c..cb0dce4a4f06 100644 --- a/hw/s390x/pv.c +++ b/hw/s390x/pv.c @@ -23,7 +23,11 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data) .cmd = cmd, .data = (uint64_t)data, }; - int rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); + int rc; + + do { + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); + } while (rc == -EINTR); if (rc) { error_report("KVM PV command %d (%s) failed: header rc %x rrc %x "