From nobody Tue Nov 11 17:32:03 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=fail Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1564412743872372.9328480642; Mon, 29 Jul 2019 08:05:43 -0700 (PDT) Received: from localhost ([::1]:53018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hs7Da-0006S4-QB for importer@patchew.org; Mon, 29 Jul 2019 11:05:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37813) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hs77D-00048M-J0 for qemu-devel@nongnu.org; Mon, 29 Jul 2019 10:59:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hs77C-0004ZP-AA for qemu-devel@nongnu.org; Mon, 29 Jul 2019 10:59:07 -0400 Received: from beetle.greensocs.com ([5.135.226.135]:48034) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hs775-0004S8-Mq; Mon, 29 Jul 2019 10:58:59 -0400 Received: from kouign-amann.bar.greensocs.com (unknown [172.16.11.117]) by beetle.greensocs.com (Postfix) with ESMTPS id 7518996F5B; Mon, 29 Jul 2019 14:58:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=greensocs.com; s=mail; t=1564412338; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aLHBAamQpnZuSEihCn2XlqNPDj9zeHn+BmvmCqsNNyM=; b=OktRKzwpS4DGsPujyFvuHWxHoOiFQMYuec2mEyCqFhQhRqVsx6iRQUmV9yM+GJgjBB1VV2 rVU4tTsNKIOKz47aSvmkoNvjINRdD07upaDMw1OASDTHj/1Z3kzShIIzY5VjU5bP8fpe1/ SqO10qi/lYTArxhx4bV4ozRANh0QWOg= From: Damien Hedde To: qemu-devel@nongnu.org Date: Mon, 29 Jul 2019 16:56:27 +0200 Message-Id: <20190729145654.14644-7-damien.hedde@greensocs.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729145654.14644-1-damien.hedde@greensocs.com> References: <20190729145654.14644-1-damien.hedde@greensocs.com> MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=greensocs.com; s=mail; t=1564412338; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aLHBAamQpnZuSEihCn2XlqNPDj9zeHn+BmvmCqsNNyM=; b=7FvqhxfHd9nIiRQiKCyoJA5jR+lY+zCsfj/Kt4pNUPP7NB4JZNThXE4fwdVqR7E50vS95J MzyI949VESJBVix+7dyB3nUWQJqmczcRrvEKJ1f8BXPzWvV2uEhsYv1EqZhqwyr6n/04gW hdTHl6Ah5853jF80pMOYu0ims4PzXcs= ARC-Seal: i=1; s=mail; d=greensocs.com; t=1564412338; a=rsa-sha256; cv=none; b=3ZEilZd31eZOE/WYaB9XrZNwsUgjcBOsCQbFYa5WECMb+IwBMXujJnoun+SIEXbnoJsbkF IogGDT9L+lKtNZ3VjmNW60NFhBcUJmdAGKBOxSJVn/9vktMXyTu1S7dlHjHG3Zn+B20Xh6 axzuVGCpwNJMToS0ZxInyb9JE+TuvYU= ARC-Authentication-Results: i=1; beetle.greensocs.com; none X-Spam: Yes Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 5.135.226.135 Subject: [Qemu-devel] [PATCH v3 06/33] add the vmstate description for device reset state 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: fam@euphon.net, peter.maydell@linaro.org, walling@linux.ibm.com, dmitry.fleytman@gmail.com, mst@redhat.com, mark.cave-ayland@ilande.co.uk, kraxel@redhat.com, edgar.iglesias@xilinx.com, hare@suse.com, qemu-block@nongnu.org, david@redhat.com, pasic@linux.ibm.com, borntraeger@de.ibm.com, marcandre.lureau@redhat.com, rth@twiddle.net, thuth@redhat.com, ehabkost@redhat.com, alistair@alistair23.me, qemu-s390x@nongnu.org, qemu-arm@nongnu.org, clg@kaod.org, jsnow@redhat.com, david@gibson.dropbear.id.au, Damien Hedde , berrange@redhat.com, cohuck@redhat.com, mark.burton@greensocs.com, qemu-ppc@nongnu.org, pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" It contains the resetting counter and cold flag status. At this point, migration of bus reset related state (counter and cold/warm flag) is handled by parent device. This done using the post_load function in the vmsd subsection. This is last point allow to add an initial support of migration with part of qdev/qbus tree in reset state under the following condition: + time-lasting reset are asserted on Device only Note that if this condition is not respected, migration will succeed and no failure will occurs. The only impact is that the resetting counter of a bus may lower afer a migration. Signed-off-by: Damien Hedde --- hw/core/Makefile.objs | 1 + hw/core/qdev-vmstate.c | 45 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 hw/core/qdev-vmstate.c diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs index d9234aa98a..49e9be0228 100644 --- a/hw/core/Makefile.objs +++ b/hw/core/Makefile.objs @@ -4,6 +4,7 @@ common-obj-y +=3D bus.o reset.o common-obj-y +=3D resettable.o common-obj-$(CONFIG_SOFTMMU) +=3D qdev-fw.o common-obj-$(CONFIG_SOFTMMU) +=3D fw-path-provider.o +common-obj-$(CONFIG_SOFTMMU) +=3D qdev-vmstate.o # irq.o needed for qdev GPIO handling: common-obj-y +=3D irq.o common-obj-y +=3D hotplug.o diff --git a/hw/core/qdev-vmstate.c b/hw/core/qdev-vmstate.c new file mode 100644 index 0000000000..07b010811f --- /dev/null +++ b/hw/core/qdev-vmstate.c @@ -0,0 +1,45 @@ +/* + * Device vmstate + * + * Copyright (c) 2019 GreenSocs + * + * Authors: + * Damien Hedde + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "hw/qdev.h" +#include "migration/vmstate.h" + +static bool device_vmstate_reset_needed(void *opaque) +{ + DeviceState *dev =3D (DeviceState *) opaque; + return dev->resetting !=3D 0; +} + +static int device_vmstate_reset_post_load(void *opaque, int version_id) +{ + DeviceState *dev =3D (DeviceState *) opaque; + BusState *bus; + QLIST_FOREACH(bus, &dev->child_bus, sibling) { + bus->resetting =3D dev->resetting; + bus->reset_is_cold =3D dev->reset_is_cold; + } + return 0; +} + +const struct VMStateDescription device_vmstate_reset =3D { + .name =3D "device_reset", + .version_id =3D 0, + .minimum_version_id =3D 0, + .needed =3D device_vmstate_reset_needed, + .post_load =3D device_vmstate_reset_post_load, + .fields =3D (VMStateField[]) { + VMSTATE_UINT32(resetting, DeviceState), + VMSTATE_BOOL(reset_is_cold, DeviceState), + VMSTATE_END_OF_LIST() + }, +}; --=20 2.22.0