{"id":2219365,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2219365/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260402215629.745866-31-ruslichenko.r@gmail.com>","date":"2026-04-02T21:56:15","name":"[v3,30/33] hw/core/fdt_generic_util: Add deferred device initialization support","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"9349193745d59b34bc20fc7233f83271de88f382","submitter":{"id":92275,"url":"http://patchwork.ozlabs.org/api/1.0/people/92275/?format=json","name":"Ruslan Ruslichenko","email":"ruslichenko.r@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260402215629.745866-31-ruslichenko.r@gmail.com/mbox/","series":[{"id":498555,"url":"http://patchwork.ozlabs.org/api/1.0/series/498555/?format=json","date":"2026-04-02T21:55:47","name":"hw/arm: Introduce generic FDT-driven machine","version":3,"mbox":"http://patchwork.ozlabs.org/series/498555/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2219365/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=E3Qsigly;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fmwn45fBHz1yDH\n\tfor ; Fri, 03 Apr 2026 09:02:00 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w8Q3A-000137-Fv; Thu, 02 Apr 2026 17:58:04 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w8Q2m-0000IY-7F\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 17:57:40 -0400","from mail-ej1-x632.google.com ([2a00:1450:4864:20::632])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from )\n id 1w8Q2j-0007HS-Co\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 17:57:38 -0400","by mail-ej1-x632.google.com with SMTP id\n a640c23a62f3a-b97f9587e6eso189496166b.3\n for ; Thu, 02 Apr 2026 14:57:36 -0700 (PDT)","from thinkpad-t470s.. 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Iglesias\" ,\n Ruslan_Ruslichenko@epam.com, balaton@eik.bme.hu","Subject":"[PATCH v3 30/33] hw/core/fdt_generic_util: Add deferred device\n initialization support","Date":"Thu, 2 Apr 2026 23:56:15 +0200","Message-ID":"<20260402215629.745866-31-ruslichenko.r@gmail.com>","X-Mailer":"git-send-email 2.43.0","In-Reply-To":"<20260402215629.745866-1-ruslichenko.r@gmail.com>","References":"<20260402215629.745866-1-ruslichenko.r@gmail.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=2a00:1450:4864:20::632;\n envelope-from=ruslichenko.r@gmail.com; helo=mail-ej1-x632.google.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, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"From: Ruslan Ruslichenko \n\nAdd a mechanism to defer device initialization\nuntil after the main FDT traversal.\n\nThis introduces a deferred queue in FDTMachineInfo.\nDevices in this queue are processed in fdt_init_deferred(),\nwhich handles their realization, reset registration,\nand resource parsing (interrupts and memory regions).\n\nThis allows resolving initialization where devices need to\nbe realized on latest stages or outside of co-routine context.\n\nSigned-off-by: Ruslan Ruslichenko \n---\n hw/core/fdt_generic_util.c | 28 ++++++++++++++++++++++++++++\n include/hw/core/fdt_generic.h | 8 ++++++++\n 2 files changed, 36 insertions(+)","diff":"diff --git a/hw/core/fdt_generic_util.c b/hw/core/fdt_generic_util.c\nindex c92b5c287b..ae54ada11d 100644\n--- a/hw/core/fdt_generic_util.c\n+++ b/hw/core/fdt_generic_util.c\n@@ -93,6 +93,13 @@ static bool qemu_irq_shared_or_handler(bool *inputs, int n)\n return false;\n }\n \n+static void fdt_parse_node_reg_prop(FDTMachineInfo *fdti, char *node_path,\n+ Object *dev);\n+static void fdt_parse_node_irq_prop(FDTMachineInfo *fdti, char *node_path,\n+ Object *dev);\n+static void fdt_init_device_realize(FDTMachineInfo *fdti, char *node_path,\n+ Object *dev);\n+\n static void qemu_irq_shared_handler(void *opaque, int n, int level)\n {\n QEMUIRQSharedState *s = opaque;\n@@ -162,6 +169,26 @@ static void fdt_init_cpu_clusters(FDTMachineInfo *fdti)\n }\n }\n \n+static void fdt_init_deferred(FDTMachineInfo *fdti)\n+{\n+ while (fdti->deferred) {\n+ FDTDeferredNode *dnode = fdti->deferred;\n+\n+ fdt_debug(\"FDT: Deferred realize node: %s\\n\",\n+ dnode->node_path);\n+\n+ fdt_init_device_realize(fdti, dnode->node_path, OBJECT(dnode->dev));\n+\n+ fdt_parse_node_reg_prop(fdti, dnode->node_path, OBJECT(dnode->dev));\n+\n+ fdt_parse_node_irq_prop(fdti, dnode->node_path, OBJECT(dnode->dev));\n+\n+ fdti->deferred = dnode->next;\n+ g_free(dnode->node_path);\n+ g_free(dnode);\n+ }\n+}\n+\n FDTMachineInfo *fdt_generic_create_machine(void *fdt, qemu_irq *cpu_irq)\n {\n FDTMachineInfo *fdti = fdt_init_new_fdti(fdt);\n@@ -175,6 +202,7 @@ FDTMachineInfo *fdt_generic_create_machine(void *fdt, qemu_irq *cpu_irq)\n while (qemu_co_enter_next(fdti->cq, NULL)) {\n ;\n }\n+ fdt_init_deferred(fdti);\n fdt_init_cpu_clusters(fdti);\n fdt_init_all_irqs(fdti);\n memory_region_transaction_commit();\ndiff --git a/include/hw/core/fdt_generic.h b/include/hw/core/fdt_generic.h\nindex 3961615a9c..2d507392fa 100644\n--- a/include/hw/core/fdt_generic.h\n+++ b/include/hw/core/fdt_generic.h\n@@ -35,6 +35,12 @@ typedef struct FDTIRQConnection {\n void *next;\n } FDTIRQConnection;\n \n+typedef struct FDTDeferredNode {\n+ DeviceState *dev;\n+ char *node_path;\n+ void *next;\n+} FDTDeferredNode;\n+\n typedef struct FDTMachineInfo {\n /* the fdt blob */\n void *fdt;\n@@ -48,6 +54,8 @@ typedef struct FDTMachineInfo {\n FDTIRQConnection *irqs;\n /* list of all CPU clusters */\n FDTCPUCluster *clusters;\n+ /* list of devices for deferred init */\n+ FDTDeferredNode *deferred;\n } FDTMachineInfo;\n \n /*\n","prefixes":["v3","30/33"]}