From nobody Thu Jan 1 18:11:04 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1697792979; cv=none; d=zohomail.com; s=zohoarc; b=Ecgh4CTvAxluN/9izIK6AP+NnyjHdQ/sadu7O/p+NSQAjIHMRZU8scZcrr6B1bC1ctxPbLjiTMt49kiWXChM6SWR5g7eoO5FDrX8NK3A/hVu0PUT1HkaEm65hR9Cm0aIeOhqZhHsa8jVY1m61Yj0hCIvVyHfc0w5u9H/FZQLoBs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697792979; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=q8Pq3OBjQlCOCOhJ16gPv1cYwMXL16YRNkaNXmzIlkk=; b=Xf+8Dy/jaKDvb649Pk7VL0iju9wZYJuhoSUFnAIhJZXVYh6WPf84aVIvUMfBcnFXDGTjWID+TybeNtZwQl3Y5m7zxkMKDcO1qlM2E6gtyjHAxvsm8mtoN08B5aZ5Ib07u8+oOftOUN9nq4dBhtKFky6dqsg+0GRuel+Q2sT5A10= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1697792979075491.7090518036497; Fri, 20 Oct 2023 02:09:39 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qtlUn-0004OG-CB; Fri, 20 Oct 2023 05:08:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qtlUj-0003zb-UB for qemu-devel@nongnu.org; Fri, 20 Oct 2023 05:08:37 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qtlUh-0005S9-DF for qemu-devel@nongnu.org; Fri, 20 Oct 2023 05:08:37 -0400 Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-390-R_h-bEmqP3eTdDMrbt7WVw-1; Fri, 20 Oct 2023 05:08:33 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A64D03C1014D; Fri, 20 Oct 2023 09:08:31 +0000 (UTC) Received: from secure.mitica (unknown [10.39.194.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id B91232166B26; Fri, 20 Oct 2023 09:08:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697792914; 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=q8Pq3OBjQlCOCOhJ16gPv1cYwMXL16YRNkaNXmzIlkk=; b=E1+m2aYdPRgaxI/T4tDvqqoX1emNX7umACDP1dCx9eprDnk5TJAxMQx8lKxmXWe/kG6LtX s/6zpGZm+qEc8c+IDQRS3kHLXod/O37NbOPq4tab8wEWhJzYs6iiCjc39Wx09y9Hrff/91 MqNX1yi9+BP9R23wROPB7Nup8Q1vqPc= X-MC-Unique: R_h-bEmqP3eTdDMrbt7WVw-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: Peter Maydell , Harsh Prateek Bora , David Hildenbrand , Samuel Thibault , Eric Farman , qemu-arm@nongnu.org, qemu-ppc@nongnu.org, Thomas Huth , Gerd Hoffmann , Fabiano Rosas , David Gibson , Corey Minyard , "Michael S. Tsirkin" , Peter Xu , Corey Minyard , Stefan Berger , Juan Quintela , Marcel Apfelbaum , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Richard Henderson , Halil Pasic , Leonardo Bras , John Snow , Nicholas Piggin , Mark Cave-Ayland , Christian Borntraeger , Ilya Leoshkevich , Jason Wang , qemu-block@nongnu.org, qemu-s390x@nongnu.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Daniel Henrique Barboza , Stefan Weil Subject: [PATCH v2 10/13] migration: Improve example and documentation of vmstate_register() Date: Fri, 20 Oct 2023 11:07:28 +0200 Message-ID: <20231020090731.28701-11-quintela@redhat.com> In-Reply-To: <20231020090731.28701-1-quintela@redhat.com> References: <20231020090731.28701-1-quintela@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=170.10.133.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1697792979328100008 Content-Type: text/plain; charset="utf-8" Signed-off-by: Juan Quintela Reviewed-by: Stefan Berger --- docs/devel/migration.rst | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst index c3e1400c0c..bfd8710c95 100644 --- a/docs/devel/migration.rst +++ b/docs/devel/migration.rst @@ -165,13 +165,17 @@ An example (from hw/input/pckbd.c) } }; =20 -We are declaring the state with name "pckbd". -The ``version_id`` is 3, and the fields are 4 uint8_t in a KBDState struct= ure. -We registered this with: +We are declaring the state with name "pckbd". The ``version_id`` is +3, and there are 4 uint8_t fields in the KBDState structure. We +registered this ``VMSTATEDescription`` with one of the following +functions. The first one will generate a device ``instance_id`` +different for each registration. Use the second one if you already +have an id that is different for each instance of the device: =20 .. code:: c =20 - vmstate_register(NULL, 0, &vmstate_kbd, s); + vmstate_register_any(NULL, &vmstate_kbd, s); + vmstate_register(NULL, instance_id, &vmstate_kbd, s); =20 For devices that are ``qdev`` based, we can register the device in the cla= ss init function: --=20 2.41.0