From patchwork Thu Jun 4 13:16:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11587945 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 84729913 for ; Thu, 4 Jun 2020 13:20:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5A7422065C for ; Thu, 4 Jun 2020 13:20:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="R3Sa/hBA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5A7422065C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:41510 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jgpnW-0007Hn-Kg for patchwork-qemu-devel@patchwork.kernel.org; Thu, 04 Jun 2020 09:20:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58774) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jgpkJ-00007m-Ra for qemu-devel@nongnu.org; Thu, 04 Jun 2020 09:17:23 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:33359 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 1jgpkI-00026a-Qr for qemu-devel@nongnu.org; Thu, 04 Jun 2020 09:17:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591276642; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type:in-reply-to:in-reply-to: references:references; bh=0//tcfnDzU+f8W3/NywI8MaQbxXvmBkTXjmDnzJ+n4A=; b=R3Sa/hBAYDXW8SvdV7/b4SfM5pKBYt3aQF927mDeJkpmWPQbx41MYqRWSt9qmlSdllzNlW OFywhvcfdH9Kyaj9ii58PRTo3YtLnHtwf1y2Pc1Mq+ymLXIHOuLpCNpNziR+1JbA8ou9Ep NDeOV5rgCNvC/XguiaORyWpTHSgE1UI= 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-426-tN6Ts-ouP6WXlb8L7EiYKw-1; Thu, 04 Jun 2020 09:17:20 -0400 X-MC-Unique: tN6Ts-ouP6WXlb8L7EiYKw-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 06D7EA0BE0 for ; Thu, 4 Jun 2020 13:17:06 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-113-50.ams2.redhat.com [10.36.113.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id CA67A19C58; Thu, 4 Jun 2020 13:16:44 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id D4B7B1750A; Thu, 4 Jun 2020 15:16:43 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH v2 1/7] qdev: add support for device module loading Date: Thu, 4 Jun 2020 15:16:37 +0200 Message-Id: <20200604131643.1776-2-kraxel@redhat.com> In-Reply-To: <20200604131643.1776-1-kraxel@redhat.com> References: <20200604131643.1776-1-kraxel@redhat.com> 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=kraxel@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/04 01:08:38 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: dinechin@redhat.com, Paolo Bonzini , =?utf-8?q?Dani?= =?utf-8?q?el_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Gerd Hoffmann Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" When compiling devices as modules we'll need some infrastrtucture to actually load those modules if needed. This patch adds it. Signed-off-by: Gerd Hoffmann --- include/hw/qdev-core.h | 3 +++ include/qemu/module.h | 1 + hw/core/qdev.c | 50 ++++++++++++++++++++++++++++++++++++++++++ qdev-monitor.c | 5 +++++ qom/qom-qmp-cmds.c | 1 + stubs/hw-module.c | 6 +++++ stubs/Makefile.objs | 1 + 7 files changed, 67 insertions(+) create mode 100644 stubs/hw-module.c diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index b870b279661a..a96c890bb95b 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -552,4 +552,7 @@ void device_listener_unregister(DeviceListener *listener); */ bool qdev_should_hide_device(QemuOpts *opts); +void qdev_module_load_type(const char *type); +void qdev_module_load_all(void); + #endif diff --git a/include/qemu/module.h b/include/qemu/module.h index 011ae1ae7605..077a6b09bca7 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -64,6 +64,7 @@ typedef enum { #define block_module_load_one(lib) module_load_one("block-", lib) #define ui_module_load_one(lib) module_load_one("ui-", lib) #define audio_module_load_one(lib) module_load_one("audio-", lib) +#define hw_module_load_one(lib) module_load_one("hw-", lib) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 9e5538aeaebd..7177798840d4 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -146,10 +146,60 @@ DeviceState *qdev_create(BusState *bus, const char *name) return dev; } +/* + * Building devices modular is mostly useful in case they have + * dependencies to external libraries. Which is the case for very few + * devices. So with the expecration that this will be rather the + * exception than to rule go with a simple hardcoded list for now ... + */ +static struct { + const char *type; + const char *mod; +} const hwmodules[] = { +}; + +static bool qdev_module_loaded_all; + +void qdev_module_load_type(const char *type) +{ + int i; + + if (qdev_module_loaded_all) { + return; + } + for (i = 0; i < ARRAY_SIZE(hwmodules); i++) { + if (strcmp(hwmodules[i].type, type) == 0) { + hw_module_load_one(hwmodules[i].mod); + return; + } + } +} + +void qdev_module_load_all(void) +{ + int i; + + if (qdev_module_loaded_all) { + return; + } + for (i = 0; i < ARRAY_SIZE(hwmodules); i++) { + if (i > 0 && strcmp(hwmodules[i - 1].mod, + hwmodules[i].mod) == 0) { + /* one module implementing multiple devices -> load only once */ + continue; + } + hw_module_load_one(hwmodules[i].mod); + } + qdev_module_loaded_all = true; +} + DeviceState *qdev_try_create(BusState *bus, const char *type) { DeviceState *dev; + if (object_class_by_name(type) == NULL) { + qdev_module_load_type(type); + } if (object_class_by_name(type) == NULL) { return NULL; } diff --git a/qdev-monitor.c b/qdev-monitor.c index a4735d3bb190..55dddeb2f978 100644 --- a/qdev-monitor.c +++ b/qdev-monitor.c @@ -147,6 +147,7 @@ static void qdev_print_devinfos(bool show_no_user) int i; bool cat_printed; + qdev_module_load_all(); list = object_class_get_list_sorted(TYPE_DEVICE, false); for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) { @@ -224,6 +225,10 @@ static DeviceClass *qdev_get_device_class(const char **driver, Error **errp) oc = object_class_by_name(*driver); } } + if (!oc) { + qdev_module_load_type(*driver); + oc = object_class_by_name(*driver); + } if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) { if (*driver != original_name) { diff --git a/qom/qom-qmp-cmds.c b/qom/qom-qmp-cmds.c index c5249e44d020..fe48cd2f9cf0 100644 --- a/qom/qom-qmp-cmds.c +++ b/qom/qom-qmp-cmds.c @@ -116,6 +116,7 @@ ObjectTypeInfoList *qmp_qom_list_types(bool has_implements, { ObjectTypeInfoList *ret = NULL; + qdev_module_load_all(); object_class_foreach(qom_list_types_tramp, implements, abstract, &ret); return ret; diff --git a/stubs/hw-module.c b/stubs/hw-module.c new file mode 100644 index 000000000000..1c312d2fc2b3 --- /dev/null +++ b/stubs/hw-module.c @@ -0,0 +1,6 @@ +#include "qemu/osdep.h" +#include "hw/qdev-core.h" + +void qdev_module_load_all(void) +{ +} diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs index 6a9e3135e8f9..a4eb96514ddc 100644 --- a/stubs/Makefile.objs +++ b/stubs/Makefile.objs @@ -44,4 +44,5 @@ stub-obj-y += pci-host-piix.o stub-obj-y += ram-block.o stub-obj-y += ramfb.o stub-obj-y += fw_cfg.o +stub-obj-y += hw-module.o stub-obj-$(CONFIG_SOFTMMU) += semihost.o