From patchwork Mon Jun 12 05:32:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharata B Rao X-Patchwork-Id: 9780443 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8E03F60382 for ; Mon, 12 Jun 2017 05:34:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8032B28405 for ; Mon, 12 Jun 2017 05:34:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 746B128497; Mon, 12 Jun 2017 05:34:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 36ECC2846B for ; Mon, 12 Jun 2017 05:34:13 +0000 (UTC) Received: from localhost ([::1]:36156 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dKHzQ-0004Aa-NS for patchwork-qemu-devel@patchwork.kernel.org; Mon, 12 Jun 2017 01:34:12 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55334) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dKHyE-00040y-9P for qemu-devel@nongnu.org; Mon, 12 Jun 2017 01:32:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dKHy9-0008Ct-DV for qemu-devel@nongnu.org; Mon, 12 Jun 2017 01:32:58 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:47569 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dKHy9-0008CY-7u for qemu-devel@nongnu.org; Mon, 12 Jun 2017 01:32:53 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v5C5TU1X137464 for ; Mon, 12 Jun 2017 01:32:52 -0400 Received: from e23smtp06.au.ibm.com (e23smtp06.au.ibm.com [202.81.31.148]) by mx0b-001b2d01.pphosted.com with ESMTP id 2b19fkdame-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 12 Jun 2017 01:32:51 -0400 Received: from localhost by e23smtp06.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 12 Jun 2017 15:32:47 +1000 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v5C5WkBE6357278; Mon, 12 Jun 2017 15:32:46 +1000 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v5C5WjJr011803; Mon, 12 Jun 2017 15:32:46 +1000 Received: from bharata.in.ibm.com ([9.124.35.226]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v5C5Wf9U011597; Mon, 12 Jun 2017 15:32:44 +1000 From: Bharata B Rao To: qemu-devel@nongnu.org Date: Mon, 12 Jun 2017 11:02:34 +0530 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1497245555-32472-1-git-send-email-bharata@linux.vnet.ibm.com> References: <1497245555-32472-1-git-send-email-bharata@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17061205-0040-0000-0000-0000032C16B6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17061205-0041-0000-0000-00000CA62FEA Message-Id: <1497245555-32472-2-git-send-email-bharata@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-06-12_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1706120096 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v6 1/2] spapr: Add a "no HPT" encoding to HTAB migration stream X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rnsastry@linux.vnet.ibm.com, qemu-ppc@nongnu.org, sjitindarsingh@gmail.com, Bharata B Rao , sam.bobroff@au1.ibm.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add a "no HPT" encoding (using value -1) to the HTAB migration stream (in the place of HPT size) when the guest doesn't allocate HPT. This will help the target side to match target HPT with the source HPT and thus enable successful migration. Suggested-by: David Gibson Signed-off-by: Bharata B Rao --- hw/ppc/spapr.c | 29 +++++++++++++++++++++++++---- 1 file changed, 25 insertions(+), 4 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 8b541d9..c425499 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1558,13 +1558,19 @@ static int htab_save_setup(QEMUFile *f, void *opaque) sPAPRMachineState *spapr = opaque; /* "Iteration" header */ - qemu_put_be32(f, spapr->htab_shift); + if (!spapr->htab_shift) { + qemu_put_be32(f, -1); + } else { + qemu_put_be32(f, spapr->htab_shift); + } if (spapr->htab) { spapr->htab_save_index = 0; spapr->htab_first_pass = true; } else { - assert(kvm_enabled()); + if (spapr->htab_shift) { + assert(kvm_enabled()); + } } @@ -1710,7 +1716,12 @@ static int htab_save_iterate(QEMUFile *f, void *opaque) int rc = 0; /* Iteration header */ - qemu_put_be32(f, 0); + if (!spapr->htab_shift) { + qemu_put_be32(f, -1); + return 0; + } else { + qemu_put_be32(f, 0); + } if (!spapr->htab) { assert(kvm_enabled()); @@ -1744,7 +1755,12 @@ static int htab_save_complete(QEMUFile *f, void *opaque) int fd; /* Iteration header */ - qemu_put_be32(f, 0); + if (!spapr->htab_shift) { + qemu_put_be32(f, -1); + return 0; + } else { + qemu_put_be32(f, 0); + } if (!spapr->htab) { int rc; @@ -1788,6 +1804,11 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) section_hdr = qemu_get_be32(f); + if (section_hdr == -1) { + spapr_free_hpt(spapr); + return 0; + } + if (section_hdr) { Error *local_err = NULL;