{"id":2234933,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2234933/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260508101901.930781-4-mark.caveayland@nutanix.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.2/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":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260508101901.930781-4-mark.caveayland@nutanix.com>","list_archive_url":null,"date":"2026-05-08T10:17:42","name":"[v3,3/4] hw/char/serial-isa.c: declare IRQ as shared in ACPI IRQ descriptor","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"f4e1587c386a438c23b3396523692269be9d3e86","submitter":{"id":90722,"url":"http://patchwork.ozlabs.org/api/1.2/people/90722/?format=json","name":"Mark Cave-Ayland","email":"mark.caveayland@nutanix.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260508101901.930781-4-mark.caveayland@nutanix.com/mbox/","series":[{"id":503362,"url":"http://patchwork.ozlabs.org/api/1.2/series/503362/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=503362","date":"2026-05-08T10:17:41","name":"isa-serial: acpi: declare shared IRQs for COM1/3 and COM2/4","version":3,"mbox":"http://patchwork.ozlabs.org/series/503362/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2234933/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2234933/checks/","tags":{},"related":[],"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=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=proofpoint20171006 header.b=2XdtY1Dn;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=selector1 header.b=R5DC+JMb;\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=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.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 4gBlVQ2JJRz1yJq\n\tfor ; Fri, 08 May 2026 20:19:58 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1wLIIn-0007JP-Cr; Fri, 08 May 2026 06:19:25 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wLIIl-0007GO-7P\n for qemu-devel@nongnu.org; Fri, 08 May 2026 06:19:23 -0400","from mx0a-002c1b01.pphosted.com ([148.163.151.68])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wLIIj-0006kr-Hk\n for qemu-devel@nongnu.org; Fri, 08 May 2026 06:19:22 -0400","from pps.filterd (m0127840.ppops.net [127.0.0.1])\n by mx0a-002c1b01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 6488m2Sw747656; Fri, 8 May 2026 03:19:20 -0700","from cy3pr05cu001.outbound.protection.outlook.com\n (mail-westcentralusazon11023093.outbound.protection.outlook.com\n [40.93.201.93])\n by mx0a-002c1b01.pphosted.com (PPS) with ESMTPS id 4e1cmyg5t9-1\n (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT);\n Fri, 08 May 2026 03:19:20 -0700 (PDT)","from PH0PR02MB7159.namprd02.prod.outlook.com (2603:10b6:510:16::8)\n by SA1PR02MB8624.namprd02.prod.outlook.com (2603:10b6:806:1ff::6) with\n Microsoft SMTP Server (version=TLS1_2,\n cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9891.17; Fri, 8 May\n 2026 10:19:18 +0000","from PH0PR02MB7159.namprd02.prod.outlook.com\n ([fe80::8e97:bc32:822c:b250]) by PH0PR02MB7159.namprd02.prod.outlook.com\n ([fe80::8e97:bc32:822c:b250%6]) with mapi id 15.20.9891.019; Fri, 8 May 2026\n 10:19:18 +0000"],"DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/relaxed; d=nutanix.com; h=\n content-transfer-encoding:content-type:date:from:in-reply-to\n :message-id:mime-version:references:subject:to; s=\n proofpoint20171006; bh=dqIbW4ATAI85L1MTqVRarKsWyYhPF90kVKAHre9Go\n 7c=; b=2XdtY1DnMMUHqSWy/xD9PYtM4UjzISmGmhCCloN6DROLgC/Wa82anGDUC\n Cy68lU/2qaCTHG4gHxOTQhgGHjtSGfasdn23ANJuNaVCPhaESRqPMylRN0XZa5hu\n dJfr1fph9jOtkN/5aMz7OWEPvnwhKdUqAdPt6+nOD/UkV5KPbtJRi8Nk41KpK687\n kjHgP8D2/fd0ikWooMZxBvRL+XIzXQXQdtC6zlvIWHV+4e6xGtvXZMSXCzfqNeHD\n hfVngjUJcfV7tWVkSsmiDM4QzvApKBjZ6hhdJ4sgTqHj8ZeTkEprfr1JggEeAnwo\n 3i5Ub2fG4JbPPpC2TZMLxEuD6MOCg==","v=1; a=rsa-sha256; c=relaxed/relaxed; d=nutanix.com;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=dqIbW4ATAI85L1MTqVRarKsWyYhPF90kVKAHre9Go7c=;\n b=R5DC+JMbse43Zg4ThOF0B9VxciSbDNEO+dtDreidQlrdRxOxOFtVAf4FqNk6ExV4bY97wY4SsYc0PUHbbXAt6dMpfTiZhAwpLQ4MuKrcoDHmPgFTj7GQRz7eh5yU5WMEFQofq8OvDS+kPq0XLkb7tp7o3MjoNPqzVY9fP15C6YPyrqcppjdjIhJv+UK53Xq4hYTTJhFzZV1/e3xXVjBV4JGKzLQeuLPPnrTBX1GwtKcFwvahgHtBuCkPb1Qs1z75ZypfKjmicSPtsC81/iizwyB/nVqIugMSxgGSCW8yzvi4I5QfwBzv87qY8T26j9lwBhLBOSt9Qqe9cWF7NvtAPw=="],"ARC-Seal":"i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;\n b=CwVSLSADDcMOw7j7zdgUW8C/zDpQ9ulufV8/XJlNLZXgcBqG6PUlFU94EZ3dkPE8eGDgfEPX8cmyNvxvv5dsx9K2kwSkGywrUMR83ZHdUFUoNQnPv04CTh/kUe/aFNktLs7pTrwCtlq2HV6h/y5uEDDRNDMVYq+VGe8wHTOeokz7dtViK7RnkEazWUsxidtLfYLchuDCPndBn7LdTx46dzCyWhMmz2Jec3gZJYcU1PdnAZcbGhSEkZ14dLMc2hbGQgTlVZ13/G09i3UpyxX0ZGVoPmNhI/XCJHLUBwPFHBoiO7cycEzqiAT8baW/OD7Jy8y5B47E7l/gKeb6v82DHw==","ARC-Message-Signature":"i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;\n s=arcselector10001;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;\n bh=dqIbW4ATAI85L1MTqVRarKsWyYhPF90kVKAHre9Go7c=;\n b=Y/B1fU/YzTjRDyPrxuyJ/0xI/FrSiAd0qzYwSPwNM6iw6UHQxGgGJxNE9CG1DcNgz3RkjmjjDQwQZ/qhROWoFL/kMcWSLxEZr2e//EUOic+tJYxPYw2eInLBoKt1jtI72lKeF2Qqoo3i0nW5YlXOPESu/+gSHMec6h5ZzA00D7IB2PXru09WylTEh+kxb5hsXEEK5dItQs9zpETLROY72JYCCuiqWerl1/7Dx2M8/TWYr2MoliNC5NNgfzF+86LePN2cfNevrEMc2ttTGl7Ry9eoK2SPX69ARVPwq3UqmC+ASASXmHx78s000l1jg2tUKltbS8iobrEcfWAhdk8zDQ==","ARC-Authentication-Results":"i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=nutanix.com; dmarc=pass action=none header.from=nutanix.com;\n dkim=pass header.d=nutanix.com; arc=none","From":"Mark Cave-Ayland ","To":"mst@redhat.com, imammedo@redhat.com, anisinha@redhat.com,\n pbonzini@redhat.com, marcandre.lureau@redhat.com, qemu-devel@nongnu.org","Subject":"[PATCH v3 3/4] hw/char/serial-isa.c: declare IRQ as shared in ACPI\n IRQ descriptor","Date":"Fri, 8 May 2026 11:17:42 +0100","Message-ID":"<20260508101901.930781-4-mark.caveayland@nutanix.com>","X-Mailer":"git-send-email 2.43.0","In-Reply-To":"<20260508101901.930781-1-mark.caveayland@nutanix.com>","References":"<20260508101901.930781-1-mark.caveayland@nutanix.com>","Content-Transfer-Encoding":"8bit","Content-Type":"text/plain","X-ClientProxiedBy":"PA7P264CA0013.FRAP264.PROD.OUTLOOK.COM\n (2603:10a6:102:2d3::18) To PH0PR02MB7159.namprd02.prod.outlook.com\n (2603:10b6:510:16::8)","MIME-Version":"1.0","X-MS-PublicTrafficType":"Email","X-MS-TrafficTypeDiagnostic":"PH0PR02MB7159:EE_|SA1PR02MB8624:EE_","X-MS-Office365-Filtering-Correlation-Id":"edb0dd75-6d11-4b6b-c185-08deaceb4332","x-proofpoint-crosstenant":"true","X-MS-Exchange-SenderADCheck":"1","X-MS-Exchange-AntiSpam-Relay":"0","X-Microsoft-Antispam":"BCL:0;\n ARA:13230040|366016|376014|1800799024|22082099003|56012099003|18002099003;","X-Microsoft-Antispam-Message-Info":"\n LbgXWRSj84HxjdeOqTzZkeHjGPeO79StUFMgu9gYI80/MqgFSZIhVC95sPFu0lj1u+BnBA2ax+MZtarxY2jEueQwxeej2UI8T5pRza4FEt80Zg4ZobRyZAU/WQselCK+FlPcaK5gixyYWieWkkxfuOGS3j9RmwVGQE1bqyVYMFXvtrfjM0i/XUGn36z6CQckJe1W5+m52z7SI4YuSplLacOcO+Jj6wPpHHJzCdqdLlZZ4bWstO0Lngna36B5CmxzME456jQrzRYVErjD4F5rfgSr32XQkq2sMK5AfjpZk2zpl7F42QxsNtXBD4276mFvUI9H7LvkNpWLlgBZJeAS1WPmxySbWdMGcU40Pwqbv5y9brnBdj+IKv7tyRxI/xphRhBoLRG0Kx+MDm+ySGLzPriukWol6drC1WdhRv22R2SAUtUHun95J1G4xIWuKMQvIifr0EFhMEQTOSKEPekxLhkBMvC1kRdx9HU3eu2ERogZ5SlEOm+B2J+KDau2a5GzWZGU1TVWkP8Omqs79N7G8qpzNazZUbbnsT/mMBsEmEchQDVCveMfxGXRRVMxUgaeHAx/SUPFzOUOlVqW8Pwx9n+v1hwfVw8V9cbwsok01VCcgP3uk1Ij5N2Ll5Z5suzdr/Q8K2woxF/iFDez6bD9Ulye7qhB2CuaedX7FbcWwgbfciQ/dVhcHR50fu2tYpav","X-Forefront-Antispam-Report":"CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:;\n IPV:NLI; SFV:NSPM; H:PH0PR02MB7159.namprd02.prod.outlook.com; PTR:; CAT:NONE;\n SFS:(13230040)(366016)(376014)(1800799024)(22082099003)(56012099003)(18002099003);\n DIR:OUT; SFP:1102;","X-MS-Exchange-AntiSpam-MessageData-ChunkCount":"1","X-MS-Exchange-AntiSpam-MessageData-0":"\n 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","X-Exchange-RoutingPolicyChecked":"\n e0/1UZA7qwPBTpBnYy1DS2zW91QGOYQ4RRCgG+EzPfTLhp97Tlipl/qMe7+xQKB+9q5mJPjfVaKGwVvEySbPCV3Bj8kPjHJ/qMLoNZgVbIJGBUsBHyqpE8WCL4u0e7/ArCF/RxuqXpGIKJlqb8CcjU6WZbN6buOH1tsyx2Dja137dJsfhXaeBxfV/dJvJHR87XlibMKeAXRXusd2NVMS8WZUi2I3NaFy9Osnw5eDxsmtFdUn11cbGXFa2BzOhRj88kWZMguSUfXR3NlozrC6JvOHwvfbKMKypoi7t1rN5ERfUnTCvCVRgSejKMkksihZTCNhB1pIbS8qAA9Y+cCbUQ==","X-OriginatorOrg":"nutanix.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n edb0dd75-6d11-4b6b-c185-08deaceb4332","X-MS-Exchange-CrossTenant-AuthSource":"PH0PR02MB7159.namprd02.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"08 May 2026 10:19:18.0857 (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"bb047546-786f-4de1-bd75-24e5b6f79043","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n kBT9OixrSMEPUvjNid9L6pnDiHnO9wiuBfCFKXOMHWmartOGZZbwZK6t4cPlnG0sNQ0Ip54rTch4n3ef85yoTLMbWgdugcjk61bC97GZVtY=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"SA1PR02MB8624","X-Proofpoint-GUID":"udHNLMi7guNiyMoj-TRONDDuuC7LKZtg","X-Proofpoint-ORIG-GUID":"udHNLMi7guNiyMoj-TRONDDuuC7LKZtg","X-Authority-Analysis":"v=2.4 cv=SMRykuvH c=1 sm=1 tr=0 ts=69fdb8a8 cx=c_pps\n a=c61ECyqdR3yyy0DXXr4X4A==:117 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19\n a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19\n a=xqWC_Br6kY4A:10 a=NGcC8JguVDcA:10 a=0kUYKlekyDsA:10\n a=VkNPw1HP01LnGYTKEx00:22 a=VofLwUrZ8Iiv6rRUPXIb:22 a=_-M8LpHI31CeLmyZm6wg:22\n a=64Cc0HZtAAAA:8 a=EDHFfd-9LZ-yJo2TyggA:9","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNTA4MDEwNiBTYWx0ZWRfX+FijppxNnH1I\n CH/wI2shOjyovBpuiYbByV8EaKkNVgZFa1LJYXNBfxXGpsUT8mbk8l92V1nb4oFV05qFBa+53S3\n +zKDIERTqJO2BW24MS/FWg6QuGECRvNwW9MqZQRuyVUFBeiUTXmzV5akkpIkIxYTNU7VKt9F6CN\n GA5FCnnAYvqOamUsXaJ6CVH+IYr0MYcXzbszhcjHTXyaL08i2+ZmWBAYJ6Pt1EgUdlE3LFelkFv\n RRE+qrTTJpMhInDXhqvd7Ji+838MvX8vnqVANSa1J5nnnElzhlEsYxS+il7LL/Y3mvrqgwQmprt\n gITF3zrNLfkQJQixZt8fTHIAQ68EMUi4Kc+50qeXJK73z1wJMUQWDkDKBt8Q96TupsgDNyiq4TZ\n AvVAgBgkE3ABPqzqkVHHKmiyIwZgEOGtjZKCbVX8SKqnSfdpQOKxn1hHNIOj3WJkUj9EwPjBVap\n B7Zh08mqWUMZYTXLkag==","X-Proofpoint-Virus-Version":"vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-05-07_02,2026-05-06_01,2025-10-01_01","X-Proofpoint-Spam-Reason":"safe","Received-SPF":"pass client-ip=148.163.151.68;\n envelope-from=mark.caveayland@nutanix.com; helo=mx0a-002c1b01.pphosted.com","X-Spam_score_int":"-31","X-Spam_score":"-3.2","X-Spam_bar":"---","X-Spam_report":"(-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.438,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_LOW=-0.7, 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 ","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 Windows 8.1 onwards ISA serial IRQs cannot be shared when ACPI Revision\n3.0 is used in the FACP table. The reason for this is that if a 2-byte IRQ\nDescriptor is used then the interrupt is considered to be high true, edge\nsensitive, non-shareable. Since legacy serial ports COM1/3 and COM2/4 share\nan IRQ then if more than 2 serial ports are added, Windows indicates a\nconflict in Device Manager and these combinations cannot be used together.\n\nChange the 2-byte IRQ Descriptor in the _CRS resource to a 3-byte IRQ\nDescriptor indicating that the ISA serial IRQ is high true, edge sensitive and\nshareable. This enables all 4 legacy serial ports to be used in Windows without\nconflict.\n\nNote that it was agreed during the list discussion that this change does not\nrequire a compatibility property since it is not part of the default machine\nconfiguration and was already broken.\n\nSigned-off-by: Mark Cave-Ayland \n---\n hw/char/serial-isa.c | 3 ++-\n 1 file changed, 2 insertions(+), 1 deletion(-)","diff":"diff --git a/hw/char/serial-isa.c b/hw/char/serial-isa.c\nindex a4be0492c5..59df726871 100644\n--- a/hw/char/serial-isa.c\n+++ b/hw/char/serial-isa.c\n@@ -92,7 +92,8 @@ static void serial_isa_build_aml(AcpiDevAmlIf *adev, Aml *scope)\n \n crs = aml_resource_template();\n aml_append(crs, aml_io(AML_DECODE16, isa->iobase, isa->iobase, 0x00, 0x08));\n- aml_append(crs, aml_irq_no_flags(isa->isairq));\n+ aml_append(crs, aml_irq(isa->isairq, AML_EDGE, AML_ACTIVE_HIGH,\n+ AML_SHARED));\n \n dev = aml_device(\"COM%d\", isa->index + 1);\n aml_append(dev, aml_name_decl(\"_HID\", aml_eisaid(\"PNP0501\")));\n","prefixes":["v3","3/4"]}