Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.0/patches/2198222/?format=api
{ "id": 2198222, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2198222/?format=api", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.0/projects/14/?format=api", "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": "<20260219144901.3317747-12-ruslichenko.r@gmail.com>", "date": "2026-02-19T14:48:58", "name": "[v2,30/33] hw/core/fdt_generic_util: Add deferred device initialization support", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "54f82649ba17e897942ab7859e890b1d3e0ece31", "submitter": { "id": 92275, "url": "http://patchwork.ozlabs.org/api/1.0/people/92275/?format=api", "name": "Ruslan Ruslichenko", "email": "ruslichenko.r@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260219144901.3317747-12-ruslichenko.r@gmail.com/mbox/", "series": [ { "id": 492690, "url": "http://patchwork.ozlabs.org/api/1.0/series/492690/?format=api", "date": "2026-02-19T14:33:04", "name": "hw/arm: Introduce generic FDT-driven machine", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/492690/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2198222/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "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=20230601 header.b=amoPnJPX;\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 4fGxF351NBz1xpl\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 20 Feb 2026 01:52:39 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1vt5MR-000473-CJ; Thu, 19 Feb 2026 09:50:35 -0500", "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 <ruslichenko.r@gmail.com>)\n id 1vt5M5-0003mN-Qa\n for qemu-devel@nongnu.org; Thu, 19 Feb 2026 09:50:20 -0500", "from mail-wr1-x42d.google.com ([2a00:1450:4864:20::42d])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <ruslichenko.r@gmail.com>)\n id 1vt5Lx-00085v-Qz\n for qemu-devel@nongnu.org; Thu, 19 Feb 2026 09:50:10 -0500", "by mail-wr1-x42d.google.com with SMTP id\n ffacd0b85a97d-4359a302794so847448f8f.1\n for <qemu-devel@nongnu.org>; Thu, 19 Feb 2026 06:49:57 -0800 (PST)", "from thinkpad-t470s.. (93-143-129-182.adsl.net.t-com.hr.\n [93.143.129.182]) by smtp.googlemail.com with ESMTPSA id\n ffacd0b85a97d-43796ac8d82sm50163087f8f.31.2026.02.19.06.49.54\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Thu, 19 Feb 2026 06:49:55 -0800 (PST)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=gmail.com; s=20230601; t=1771512596; x=1772117396; darn=nongnu.org;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=Kotv4mGzhzG39NnElKpEZYatBNMpC+cFV0bOnYfhcf8=;\n b=amoPnJPXw2q6LfJRCPA8nMCvmNYWnqRwWnepQsj1zFLYefG8NrLw16SBGYjqAMO+DH\n Vziz15HQid+uaqN6lbIWK7JO3pyAgMwhQcKTxoqtDhXaqcSNeXDiSuhTMlWxTEbKdijK\n UspFaRYLhnxYnO8zAyZYHWSA2YEgvZgshIjavqXYTx/uqcKt3rAunQJZb9SNNH/2ieZV\n JQuuA2smZnUDyBZSyDuvR/7KEs80qWt/xD9ANj/Mii5nrc5GTEBPZX/jg1iquc1jrbPh\n qfKtLD+cNEG3iyHJaKKii/trGAvIAux3UaCGVBKsarTJsCHY/NAO3YxMeo3ZzoZ524Gy\n Vv7Q==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1771512596; x=1772117396;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=Kotv4mGzhzG39NnElKpEZYatBNMpC+cFV0bOnYfhcf8=;\n b=kYcMk6Hk2k9imVeFRnFi8u0YoNIuq5lA0MEApbo5o9nAHqVow66TjRAZdRefQaswKp\n ESjyR3GsnvbDu15yTHyYKSqvojcJ4qyPcTn5VjPSP1QFUnEcZEiFn6RjY0ZZjRqn/HvU\n RsJFI4p0LWvQRbnb0bsLJfKCYgDuF1cgCqHI+NN76yn5W+AmcBkKpR3c70HRUSvAXHFX\n kg2JNmYhuX9TOpiD1cAbwOAr6WJULpc6lXYq3foOgYYBKujnyFTwbTuxjJ4njHxQmq1m\n N9D9Athcq7LAePKD+sbtes/aVrsb3gJtDgQ38NE3rCAiTTceVmWoxd+EwBHNC04gtw5S\n ZE4Q==", "X-Gm-Message-State": "AOJu0YwSVbG9svsaEZoZ+c8RD7/1ClBgJutnSIRLH3JYTmjsPvaQ65d2\n TRg3OQ10ClTosMNwrB1pjMDabOYlQk4ZPQ+bsw71Cqa2da+kJWZci89GN0vUzcLL", "X-Gm-Gg": "AZuq6aL21iSWVCCnufZX279T5nPhaABWvDbY1Q3jgi7s50hz0+F8aJKIMcxGdl9sTfx\n trJkZPaIwXadVhyJciQnXyQs/OmOcKCZCaZkWDUXmv671xnYV5lz8L3jPpZnMvnSQxcVdax6cbH\n 8C+9UTXhepTPo5cT593qRsKu9R0phhdjlR5VWCtDjIQxislRRO9gDkkSAfC1sPzOVRvtIkjTHQE\n APJvNY21MvfzBi46SpFpHwNrSHNhqSIpKFX6pERphagkg/wkU9pg/FBx4ZcLRidJj3iGR2FZ+Kb\n sA742lOrG1s5zXy7zS1kthJMsz4ZvLdtA8qPPZfLFmm26vZNGrkvnRGkvTVW/Pez3g/HOv+l9Tz\n i4LdxWRj6ZfSwMrvKz83FuLkMi2DJffT/bq/Lq2pi9qRd+NLji7vgyc+s+Zb5nxc1RUi5IKCvxp\n U96/7gvA56h/9iPOb11N7uXThAWePml7ODVS+JnVP6IkBU63Cseyqv9R14PHO3B4JYfFVP", "X-Received": "by 2002:a05:6000:2c0c:b0:437:8ff8:fea3 with SMTP id\n ffacd0b85a97d-4379db66593mr31515861f8f.21.1771512595669;\n Thu, 19 Feb 2026 06:49:55 -0800 (PST)", "From": "Ruslan Ruslichenko <ruslichenko.r@gmail.com>", "To": "qemu-devel@nongnu.org", "Cc": "qemu-arm@nongnu.org, alex.bennee@linaro.org, peter.maydell@linaro.org,\n artem_mygaiev@epam.com, volodymyr_babchuk@epam.com,\n takahiro.nakata.wr@renesas.com,\n \"Edgar E . Iglesias\" <edgar.iglesias@gmail.com>,\n Ruslan_Ruslichenko@epam.com, balaton@eik.bme.hu", "Subject": "[PATCH v2 30/33] hw/core/fdt_generic_util: Add deferred device\n initialization support", "Date": "Thu, 19 Feb 2026 15:48:58 +0100", "Message-ID": "<20260219144901.3317747-12-ruslichenko.r@gmail.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260219144901.3317747-1-ruslichenko.r@gmail.com>", "References": "<20260219143332.3316679-1-ruslichenko.r@gmail.com>\n <20260219144901.3317747-1-ruslichenko.r@gmail.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2a00:1450:4864:20::42d;\n envelope-from=ruslichenko.r@gmail.com; helo=mail-wr1-x42d.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=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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "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 <Ruslan_Ruslichenko@epam.com>\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 <Ruslan_Ruslichenko@epam.com>\n---\n hw/core/fdt_generic_util.c | 45 +++++++++++++++++++++++++++++++++++\n include/hw/core/fdt_generic.h | 8 +++++++\n 2 files changed, 53 insertions(+)", "diff": "diff --git a/hw/core/fdt_generic_util.c b/hw/core/fdt_generic_util.c\nindex c58a9ccdc7..4ed9602d47 100644\n--- a/hw/core/fdt_generic_util.c\n+++ b/hw/core/fdt_generic_util.c\n@@ -99,6 +99,11 @@ 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+\n static void qemu_irq_shared_handler(void *opaque, int n, int level)\n {\n QEMUIRQSharedState *s = opaque;\n@@ -168,6 +173,45 @@ 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+ DeviceClass *dc = DEVICE_GET_CLASS(dnode->dev);\n+ int length = 0;\n+\n+ int offset = fdt_path_offset(fdti->fdt, dnode->node_path);\n+ if (offset < 0) {\n+ error_report(\"%s Couldn't find node %s: %s\", __func__,\n+ dnode->node_path, fdt_strerror(offset));\n+ }\n+ const char *blockdev = fdt_stringlist_get(fdti->fdt, offset,\n+ \"blockdev-node-name\", 0, &length);\n+\n+ DB_PRINT(0, \"FDT: Deferred realize node: %s\\n\",\n+ dnode->node_path);\n+\n+ if (blockdev && object_property_find(OBJECT(dnode->dev), \"drive\")) {\n+ fdt_attach_blockdev(fdti, dnode->node_path, OBJECT(dnode->dev));\n+ }\n+\n+ object_property_set_bool(OBJECT(dnode->dev), \"realized\", true,\n+ &error_fatal);\n+ if (dc->legacy_reset) {\n+ qemu_register_reset((void (*)(void *))dc->legacy_reset,\n+ dnode->dev);\n+ }\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 char node_path[DT_PATH_LENGTH];\n@@ -183,6 +227,7 @@ 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 ad9e249156..dc2d7a8876 100644\n--- a/include/hw/core/fdt_generic.h\n+++ b/include/hw/core/fdt_generic.h\n@@ -34,6 +34,12 @@ 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@@ -47,6 +53,8 @@ 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": [ "v2", "30/33" ] }