From patchwork Fri Jun 16 15:50:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 776817 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wq4bQ6YFyz9s5L for ; Sat, 17 Jun 2017 01:50:58 +1000 (AEST) Received: from localhost ([::1]:59507 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dLtWS-0003B0-Hh for incoming@patchwork.ozlabs.org; Fri, 16 Jun 2017 11:50:56 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dLtVk-00035w-Pt for qemu-devel@nongnu.org; Fri, 16 Jun 2017 11:50:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dLtVj-00033K-O1 for qemu-devel@nongnu.org; Fri, 16 Jun 2017 11:50:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59934) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dLtVj-00032k-Dv for qemu-devel@nongnu.org; Fri, 16 Jun 2017 11:50:11 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4CD6D33459E; Fri, 16 Jun 2017 15:50:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 4CD6D33459E Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=mst@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 4CD6D33459E Received: from redhat.com (ovpn-123-69.rdu2.redhat.com [10.10.123.69]) by smtp.corp.redhat.com (Postfix) with SMTP id E0A7F99DE9; Fri, 16 Jun 2017 15:50:05 +0000 (UTC) Date: Fri, 16 Jun 2017 18:50:05 +0300 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <1497628168-30489-8-git-send-email-mst@redhat.com> References: <1497628168-30489-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1497628168-30489-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 16 Jun 2017 15:50:10 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 7/7] hw/i386: fix nvdimm check error path 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: Peter Maydell , Eduardo Habkost , Haozhong Zhang , Stefan Hajnoczi , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Stefan Hajnoczi Commit e987c37aee1752177906847630d32477da57e705 ("hw/i386: check if nvdimm is enabled before plugging") introduced a check to reject nvdimm hotplug if -machine pc,nvdimm=on was not given. This check executes after pc_dimm_memory_plug() has already completed and does not reverse the effect of this function in the case of failure. Perform the check before calling pc_dimm_memory_plug(). This fixes the following abort: $ qemu -M accel=kvm -m 1G,slots=4,maxmem=8G \ -object memory-backend-file,id=mem1,share=on,mem-path=nvdimm.dat,size=1G (qemu) device_add nvdimm,memdev=mem1 nvdimm is not enabled: missing 'nvdimm' in '-M' (qemu) device_add nvdimm,memdev=mem1 Core dumped The backtrace is: #0 0x00007fffdb5b191f in raise () at /lib64/libc.so.6 #1 0x00007fffdb5b351a in abort () at /lib64/libc.so.6 #2 0x00007fffdb5a9da7 in __assert_fail_base () at /lib64/libc.so.6 #3 0x00007fffdb5a9e52 in () at /lib64/libc.so.6 #4 0x000055555577a5fa in qemu_ram_set_idstr (new_block=0x555556747a00, name=, dev=dev@entry=0x555556705590) at qemu/exec.c:1709 #5 0x0000555555a0fe86 in vmstate_register_ram (mr=mr@entry=0x55555673a0e0, dev=dev@entry=0x555556705590) at migration/savevm.c:2293 #6 0x0000555555965088 in pc_dimm_memory_plug (dev=dev@entry=0x555556705590, hpms=hpms@entry=0x5555566bb0e0, mr=mr@entry=0x555556705630, align=, errp=errp@entry=0x7fffffffc660) at hw/mem/pc-dimm.c:110 #7 0x000055555581d89b in pc_dimm_plug (errp=0x7fffffffc6c0, dev=0x555556705590, hotplug_dev=) at qemu/hw/i386/pc.c:1713 #8 0x000055555581d89b in pc_machine_device_plug_cb (hotplug_dev=, dev=0x555556705590, errp=0x7fffffffc6c0) at qemu/hw/i386/pc.c:2004 #9 0x0000555555914da6 in device_set_realized (obj=, value=, errp=0x7fffffffc7e8) at hw/core/qdev.c:926 Cc: Haozhong Zhang Signed-off-by: Stefan Hajnoczi Signed-off-by: Stefan Hajnoczi Reviewed-by: Eduardo Habkost Reviewed-by: Haozhong Zhang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/pc.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 5b8c6fb..db41cca 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1692,6 +1692,7 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev, PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); MemoryRegion *mr = ddc->get_memory_region(dimm); uint64_t align = TARGET_PAGE_SIZE; + bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM); if (memory_region_get_alignment(mr) && pcmc->enforce_aligned_dimm) { align = memory_region_get_alignment(mr); @@ -1703,17 +1704,18 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev, goto out; } + if (is_nvdimm && !pcms->acpi_nvdimm_state.is_enabled) { + error_setg(&local_err, + "nvdimm is not enabled: missing 'nvdimm' in '-M'"); + goto out; + } + pc_dimm_memory_plug(dev, &pcms->hotplug_memory, mr, align, &local_err); if (local_err) { goto out; } - if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) { - if (!pcms->acpi_nvdimm_state.is_enabled) { - error_setg(&local_err, - "nvdimm is not enabled: missing 'nvdimm' in '-M'"); - goto out; - } + if (is_nvdimm) { nvdimm_plug(&pcms->acpi_nvdimm_state); }