From nobody Sun Nov 24 13:39:28 2024 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=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1722432398; cv=none; d=zohomail.com; s=zohoarc; b=ZIzdtmno9Lhc5ijFp/Jvq5OVHMnmg0X6XK8NSfRdxN/BwpPsQGUw5XNqEH2ZOgh2EH3A3Zwmu5Pol+pqFCtGwU/cyLs6Y820he1pffJKT1M2+49nB/oyIAzM1nrCKwcNsnqfqvevUJiTX9TeuL/AHDSUdIUhTnT3I/56vxYCtIQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1722432398; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=ovus5UlPKAld5lkd56ks4IhzGKwS8+lccnIO2dZgV+Y=; b=XPqdlk6QI0n7LG2jmZRcphtPbpjhH5EihDbcYqyi0DU0RkGXOqLarZ5+oUrgG7+nzSPwXa2RkEdHezueJIkSitdePCFl3IqS1hmA/s18aSvM/iOJY67RtAKu0FArrS1spdk33l51D+uwoJzLPc9ylrV1EOlnsbHyLZ1K4VcqovA= 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=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 172243239850760.10845747446547; Wed, 31 Jul 2024 06:26:38 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sZ9Ku-0002nn-Po; Wed, 31 Jul 2024 09:25:49 -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 1sZ9Kr-0002la-VR; Wed, 31 Jul 2024 09:25:45 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sZ9Kq-000582-47; Wed, 31 Jul 2024 09:25:45 -0400 Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46VBSxQu005250; Wed, 31 Jul 2024 13:25:35 GMT Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 40qme20bbm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 Jul 2024 13:25:34 +0000 (GMT) Received: from m0353723.ppops.net (m0353723.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 46VDPWlY022998; Wed, 31 Jul 2024 13:25:32 GMT Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 40qme20b80-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 Jul 2024 13:25:32 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 46VBAcKo007470; Wed, 31 Jul 2024 13:22:44 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 40nb7ubwer-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 Jul 2024 13:22:44 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 46VDMd0q50594150 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 31 Jul 2024 13:22:41 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 472452004B; Wed, 31 Jul 2024 13:22:39 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1E3AD20043; Wed, 31 Jul 2024 13:22:37 +0000 (GMT) Received: from li-3c92a0cc-27cf-11b2-a85c-b804d9ca68fa.in.ibm.com (unknown [9.109.199.72]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 31 Jul 2024 13:22:36 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from :to:cc:subject:date:message-id:mime-version :content-transfer-encoding; s=pp1; bh=ovus5UlPKAld5lkd56ks4IhzGK wS8+lccnIO2dZgV+Y=; b=jTVRxKfI2chSQcsLbCd90do7uSWCnHLBQECCpxNY8Z CezfHbLSWid5qP3sNWLzYtNzF7y6c8LkjoDQUXNI3tkIzA67OrQy1cKVx+dX68tG oc5tKvhtlQ3ZILXgXvePa30EnADbTnPBK6NePxQo3BM3dse3mYERapfUlBc1cKnA tlLn8Hs6r5cSFQScUH1QRY38xsD5Bari5xFO1YeXtA5XTmTzu5TjRT8WofYWXCr/ 9jpYtNcfzWlIpDnTyMu0FJcUElP71IwuUKmPrkRSrEY6Z8XBqNlWDRRcvbs/+rdp 61v6uBnLtodzGe+++Dna590tpKF0OyVtX2dLPNyFVTgA== From: Aditya Gupta To: Mahesh J Salgaonkar , Madhavan Srinivasan , Nicholas Piggin , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Harsh Prateek Bora , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Barrat?= Cc: , Subject: [RFC PATCH] hw/ppc: Implement -dtb support for PowerNV Date: Wed, 31 Jul 2024 18:52:35 +0530 Message-ID: <20240731132235.887918-1-adityag@linux.ibm.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: X6_iEZ2rvcHQfJkDVF3mdy1cTOD3Iy1V X-Proofpoint-GUID: wDCMDeeTJKyPmUQHQsliAGuZJcFEbvLg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-31_08,2024-07-31_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 suspectscore=0 adultscore=0 mlxlogscore=427 impostorscore=0 bulkscore=0 spamscore=0 mlxscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407310098 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=148.163.158.5; envelope-from=adityag@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, 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 @ibm.com) X-ZM-MESSAGEID: 1722432401041116600 Content-Type: text/plain; charset="utf-8" Currently any device tree passed with -dtb option in QEMU, was ignored by the PowerNV code. Read and pass the passed -dtb to the kernel, thus enabling easier debugging with custom DTBs. The existing behaviour when -dtb is 'not' passed, is preserved as-is. But when a '-dtb' is passed, it completely overrides any dtb nodes or changes QEMU might have done, such as '-append' arguments to the kernel (which are mentioned in /chosen/bootargs in the dtb), hence add warning when -dtb is being used Signed-off-by: Aditya Gupta --- This is an RFC patch, and hence might not be the final implementation, though this current one is a solution which works --- --- hw/ppc/pnv.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index 3526852685b4..12cc909b9e26 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -714,6 +714,8 @@ static void pnv_reset(MachineState *machine, ShutdownCa= use reason) PnvMachineState *pnv =3D PNV_MACHINE(machine); IPMIBmc *bmc; void *fdt; + FILE *fdt_file; + uint32_t fdt_size; =20 qemu_devices_reset(reason); =20 @@ -736,10 +738,31 @@ static void pnv_reset(MachineState *machine, Shutdown= Cause reason) } } =20 - fdt =3D pnv_dt_create(machine); + if (machine->dtb) { + warn_report("with manually passed dtb, some options like '-append'" + " might ignored and the dtb passed will be used as-is"); =20 - /* Pack resulting tree */ - _FDT((fdt_pack(fdt))); + fdt =3D g_malloc0(FDT_MAX_SIZE); + + /* read the file 'machine->dtb', and load it into 'fdt' buffer */ + fdt_file =3D fopen(machine->dtb, "r"); + if (fdt_file !=3D NULL) { + fdt_size =3D fread(fdt, sizeof(char), FDT_MAX_SIZE, fdt_file); + if (ferror(fdt_file) !=3D 0) { + error_report("Could not load dtb '%s'", + machine->dtb); + exit(1); + } + + /* mark end of the fdt buffer with '\0' */ + ((char *)fdt)[fdt_size] =3D '\0'; + } + } else { + fdt =3D pnv_dt_create(machine); + + /* Pack resulting tree */ + _FDT((fdt_pack(fdt))); + } =20 qemu_fdt_dumpdtb(fdt, fdt_totalsize(fdt)); cpu_physical_memory_write(PNV_FDT_ADDR, fdt, fdt_totalsize(fdt)); --=20 2.45.2