{"id":2232238,"url":"http://patchwork.ozlabs.org/api/patches/2232238/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260504025342.1452605-4-jamin_lin@aspeedtech.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/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":"<20260504025342.1452605-4-jamin_lin@aspeedtech.com>","list_archive_url":null,"date":"2026-05-04T02:53:46","name":"[v6,03/11] hw/usb/hcd-ehci: Add property to advertise 64-bit addressing capability","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"855275ca0c5b17bcc16d6eec96e6fd963ed11cc3","submitter":{"id":81768,"url":"http://patchwork.ozlabs.org/api/people/81768/?format=json","name":"Jamin Lin","email":"jamin_lin@aspeedtech.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260504025342.1452605-4-jamin_lin@aspeedtech.com/mbox/","series":[{"id":502603,"url":"http://patchwork.ozlabs.org/api/series/502603/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502603","date":"2026-05-04T02:53:55","name":"hw/usb/ehci: Add 64-bit descriptor addressing support","version":6,"mbox":"http://patchwork.ozlabs.org/series/502603/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2232238/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2232238/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=aspeedtech.com header.i=@aspeedtech.com\n header.a=rsa-sha256 header.s=selector1 header.b=TtvAZ1/d;\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)","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=aspeedtech.com;"],"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 4g85pm3QFqz1y04\n\tfor ; Mon, 04 May 2026 12:54:54 +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 1wJjRZ-0001Xl-TV; Sun, 03 May 2026 22:54:01 -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 1wJjRV-0001WO-67; Sun, 03 May 2026 22:53:57 -0400","from mail-japanwestazlp170120003.outbound.protection.outlook.com\n ([2a01:111:f403:c406::3] helo=OS8PR02CU002.outbound.protection.outlook.com)\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 1wJjRT-0003sY-KJ; Sun, 03 May 2026 22:53:56 -0400","from TYPPR06MB8206.apcprd06.prod.outlook.com (2603:1096:405:383::19)\n by TYUPR06MB6098.apcprd06.prod.outlook.com (2603:1096:400:358::10)\n with Microsoft SMTP Server (version=TLS1_2,\n cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9870.25; Mon, 4 May\n 2026 02:53:46 +0000","from TYPPR06MB8206.apcprd06.prod.outlook.com\n ([fe80::e659:1ead:77cb:f6d3]) by TYPPR06MB8206.apcprd06.prod.outlook.com\n ([fe80::e659:1ead:77cb:f6d3%2]) with mapi id 15.20.9870.023; Mon, 4 May 2026\n 02:53:46 +0000"],"ARC-Seal":"i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;\n b=uH9wp6TiqK5kf0b390iKrHkUR86np69Ao2CWXpP/+uq0FsKm8NLKVPrjuTeOfF82yohjCDVTTfL37w6Fmeu16EIjJv/qLvxaQx/GvsQqHnd1F9GdElRLwUYjQTj89YkPjfW6B8SGffwWzrXXwkIkn8T66WYm6n/XYy3ioP2usE6XMOybNMQBx8oN7vZvpls8+DxEV28HkXsLHmtWgmgFp3gagupTJ8zBbnVGpn+JWVn3SQKcnyCtIttrhZomgbg0PSCyjhMU5lrnEpDhxUXaySGhsDlFnbDTCfNQV7tI2w2+Q2fMREY4EIcq4Me9h2KYZwMw7xdycWF0lJZdXV8pbw==","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=g5YMZlkh6bJg1DmrzXM4Ot5jvd0kMYaXk3pupCY1/mY=;\n b=RvFmKHcXEZ797ULdOFKQill4msI3nGZISC1ojDMW8Ixw+7JJimi0ExjhKNOaEdmbwHGdwyePOKsVC/ljaZeDk3qFMokRVyGxo7vFJZvl/GBWlRSEbLCdcLipa1TMNSY48OkajmYUvgwWvl7CFLLTo6DlPm8mDpYPpXkvgZ0njUU91g2Vi7TSEsFdWoRwPzZnJILZ7Ns8urZsYcNKMPK3QiKUSlJil8TSBu4w2i2vVEDSDw1+hi50iapXuPtt2qjoltXQLr9Boxsxy2n5E6ArzFpidFJQt0c2Pu7TtRlb38cEMU1PsDFrY5DvYoGdGaGZiVdZfZ76iijMiUUQ3X+4Zg==","ARC-Authentication-Results":"i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=aspeedtech.com; dmarc=pass action=none\n header.from=aspeedtech.com; dkim=pass header.d=aspeedtech.com; arc=none","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=aspeedtech.com;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=g5YMZlkh6bJg1DmrzXM4Ot5jvd0kMYaXk3pupCY1/mY=;\n b=TtvAZ1/dL4C1JohQaaKW8i+uwkOfsVPsPiIuiwPx1ljgDmnvSQ+M9sWFtTjJVAAbu/3plg3MlepcIGO4+RVSSYcbwO5cktAnTTZGln38GZTUM7737Cn81BRPkbxW8GL+SCc7NtUx7FYDDEwSHhDPoOKmveUEGEVn6oIpAvN53i2T16RZkEubKctnNzDku/lHyqMNveSxpIgFU1wQgSdbyDJb3OyyEaRbvNZ+d2lQg6vLb77DGSzjiCvh1FWL1gZ8BAlokojKQdAudqDDy4+DcKgV2z4GP3Y+9dj5skkLpPVOIEhaOAF4RFeePITqOOQbR/tM2Yh3WptB6VrfhpvnTQ==","From":"Jamin Lin ","To":"\"philmd@linaro.org\" ,\n \"peterx@redhat.com\" ,\n =?iso-8859-1?q?C=E9dric_Le_Goater?= ,\n Peter Maydell ,\n Steven Lee , Troy Lee ,\n Kane Chen ,\n Andrew Jeffery , Joel Stanley ,\n Zhao Liu ,\n \"open list:ASPEED BMCs\" ,\n \"open list:All patches CC here\" ","CC":"Jamin Lin , Troy Lee ,\n \"farosas@suse.de\" , \"flwu@google.com\" ,\n \"nabihestefan@google.com\" , =?iso-8859-1?q?C=E9dr?=\n\t=?iso-8859-1?q?ic_Le_Goater?= ","Subject":"[PATCH v6 03/11] hw/usb/hcd-ehci: Add property to advertise 64-bit\n addressing capability","Thread-Topic":"[PATCH v6 03/11] hw/usb/hcd-ehci: Add property to advertise\n 64-bit addressing capability","Thread-Index":"AQHc23E6V3NEomWYNkCHOyFAl9cmzw==","Date":"Mon, 4 May 2026 02:53:46 +0000","Message-ID":"<20260504025342.1452605-4-jamin_lin@aspeedtech.com>","References":"<20260504025342.1452605-1-jamin_lin@aspeedtech.com>","In-Reply-To":"<20260504025342.1452605-1-jamin_lin@aspeedtech.com>","Accept-Language":"zh-TW, en-US","Content-Language":"en-US","X-MS-Has-Attach":"","X-MS-TNEF-Correlator":"","authentication-results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=aspeedtech.com header.i=@aspeedtech.com\n header.a=rsa-sha256 header.s=selector1 header.b=TtvAZ1/d;\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)","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=aspeedtech.com;"],"x-ms-publictraffictype":"Email","x-ms-traffictypediagnostic":"TYPPR06MB8206:EE_|TYUPR06MB6098:EE_","x-ms-office365-filtering-correlation-id":"fdf377a3-ce2e-4fe1-c99d-08dea9885c9a","x-ms-exchange-senderadcheck":"1","x-ms-exchange-antispam-relay":"0","x-microsoft-antispam":"BCL:0;\n ARA:13230040|1800799024|366016|7416014|376014|18002099003|22082099003|56012099003|921020|38070700021;","x-microsoft-antispam-message-info":"\n 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","x-forefront-antispam-report":"CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:;\n IPV:NLI; SFV:NSPM; H:TYPPR06MB8206.apcprd06.prod.outlook.com; PTR:; CAT:NONE;\n SFS:(13230040)(1800799024)(366016)(7416014)(376014)(18002099003)(22082099003)(56012099003)(921020)(38070700021);\n DIR:OUT; SFP:1102;","x-ms-exchange-antispam-messagedata-chunkcount":"1","x-ms-exchange-antispam-messagedata-0":"=?iso-8859-1?q?SQA/tOsaZTNcltxEuetO3XK?=\n\t=?iso-8859-1?q?kRyKh59L7HaQ8wECPEKdQi7wPYaq+24Ae43VoGskoR9NqCzMX3JfUwa0d2am?=\n\t=?iso-8859-1?q?uNYctNgJuWt7TS1TX0OVNDG9zJdshrjeyMR0mfxOvkfb8CdDHtOygwPvgwvJ?=\n\t=?iso-8859-1?q?uzKuNfRaK5aD3NfORpXqC/Ky4DvBdxp87d3/kMr696bXrlTXVpWOguyTvDTc?=\n\t=?iso-8859-1?q?sAcAjrRo86hbMoC+qgvp8tdloiWXs64H71qeB0Ba4ZwapqGHusb/5wWrKOTq?=\n\t=?iso-8859-1?q?vj7kPgwtxy5TNwJILsIQtDtM7SXACI8PtIJRTw92wXTcd13TiJeESUHVbqPi?=\n\t=?iso-8859-1?q?7rfRoTiITR0TRUeQcEwcpUOWfEJQljUETLVwR9G3txNoE4/Nfh3zmMnTdUR+?=\n\t=?iso-8859-1?q?PHHbreBtVMZ8DM/L5tC/tkcdK2vsR3b3M8yxK3IonReEKNABXxjxpYjc/xtI?=\n\t=?iso-8859-1?q?4lR8V1xTawWuzWItmDUT6VGAzxEx4102amOUZWcXz6/j3veo0zM0C8v336aK?=\n\t=?iso-8859-1?q?Cy5L5NHjx3HLEKVT9S4Gn7nmTI+3ieWuEUDbCaWnNa1p0Fb7wC9MlFp/uI2a?=\n\t=?iso-8859-1?q?X1rEnXzhguoJhYKKgKUE5BhrNbXmLeKAaQ71WdB/hUoTZ3o79qOKBLqjc5kj?=\n\t=?iso-8859-1?q?uOqoSoSPy0c3Uqvv2Gcozxlqf9CwpWZw0nOCES3eOfchruai1LqkEJSgJzfH?=\n\t=?iso-8859-1?q?bryoEZReGxlUut8zL4+JgGlkUou8qUBM7tBy8mqgz3YFIigoMhOcaX5lu5HY?=\n\t=?iso-8859-1?q?ma0O/pvogKrsODc6FRV3Ns6QObEdpZTYkBz24oOhURpCtXw8wn0ymfLgh3GF?=\n\t=?iso-8859-1?q?86ba9GH3Gy0lPduG7Tt+xfqYrsLsEA8E6BYhI5LwVduxGArAiV7Z1aoEW3Y8?=\n\t=?iso-8859-1?q?XqxFoqRjftGjSSa+qTsnoOCzsIGfO7bcxq9JIJc8CL9fTTDUYAWnyyyUzmuW?=\n\t=?iso-8859-1?q?jsi+tIRLX/Y82KcMoK+0oOE9wxLkBknfwv9BudXMLStaO5RwoZNlgpwwk+D5?=\n\t=?iso-8859-1?q?7RVzAfQLqrY9GLHKslJMUiBhyWuek6jqDF8ko/1R/vcqzGRc9CH/xxbflPaq?=\n\t=?iso-8859-1?q?q01h5Mi+Ht42Hr28p1CSgYImUkkN5AyIyGK2KuBEYT6KTLJGHBs7XKkMmFfA?=\n\t=?iso-8859-1?q?WlhAQ3P+MFuDLwph18cH4U/nwK2CVctZSaUbCPUFhXEiM1p/HcAEGN9/XLqC?=\n\t=?iso-8859-1?q?CVMYcsNUdNPq9Cg+VprJ1wnHZJUImGsA+fYDe/ay0qTVKUvjwVDb9qVft8vT?=\n\t=?iso-8859-1?q?JUNkWlrb13mOmDYs/UJ6oSlGom6B81+RGotoWFtV/oLtZxZFXf9kiZ4TFggW?=\n\t=?iso-8859-1?q?aXuE04kVSM1fxfvJlL5Sspsl3CVBwkpE83vf3efk0NNV2scJWd1kag4YGKMX?=\n\t=?iso-8859-1?q?Sww5sfTZm2wFb5f97hcsO6ST298IcOGR+fxsQwbv2doTsk8DCDAyn3Sy52PR?=\n\t=?iso-8859-1?q?A+ykYgQewM/iMYumjdcUX9o+XP33OwshiA4Zxq9aOVeQh9phSQcz0/9nIJ84?=\n\t=?iso-8859-1?q?RWSh5jjq+1V/D92e5k1roz7juI9IE+8EnD12nJyjIl80doDCk9BOAvOXPCaB?=\n\t=?iso-8859-1?q?j7OPUhnYre4iO0j9gOzF+qHywlYJvBuwdXV4kh9bjwHC4L2WEThmbihdHHjm?=\n\t=?iso-8859-1?q?xjXS47k9jDXoGonSsMYyM7sXi05A4oJV3p0rri//FtSqz28oToBJjdLII+cs?=\n\t=?iso-8859-1?q?Tc0uOci9dMD3TPAxzSsyC/RgCXRXeYP4gw9aAaWCEWNn/fwTc8kQRe7x80xA?=\n\t=?iso-8859-1?q?yuTHieWbNN+WDs3Z3FAC39ic5s7MEVldmewNpbaZkICcZHw=3D=3D?=","Content-Type":"text/plain; charset=\"iso-8859-1\"","Content-Transfer-Encoding":"quoted-printable","MIME-Version":"1.0","X-Exchange-RoutingPolicyChecked":"\n ecB5LieDUZid/iEJOXzXyqXdKsRAURrktTG6ByksgjIKDjEBQW/VnPCH7bBWx9KcEzAYSmq81u5Oe5kseKEet7RMxc88yaGWLkafTri5wxXh+KK6jcDPIVt4QYkU5VXlHGGS+RknvhSOUNG/8L6xyZQApwoSwstRIyR5CcN4ZNZItmsc49NtOnxFOp3K9aOj2x3cctxUxBBVKGCFi1uHtZIB0fXSx1ocap57n3Zoipc6VPRxZAJcp/sGVQCJcFAMCMfitvkoomnSYQmsLVk6OT3N1OtD70vC1zkjOZ68MwmPp4oE8bMrDXUPFxFOLqgFiYUKIXv3Bmo7ahBUaqU9Iw==","X-OriginatorOrg":"aspeedtech.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-AuthSource":"TYPPR06MB8206.apcprd06.prod.outlook.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n fdf377a3-ce2e-4fe1-c99d-08dea9885c9a","X-MS-Exchange-CrossTenant-originalarrivaltime":"04 May 2026 02:53:46.7430 (UTC)","X-MS-Exchange-CrossTenant-fromentityheader":"Hosted","X-MS-Exchange-CrossTenant-id":"43d4aa98-e35b-4575-8939-080e90d5a249","X-MS-Exchange-CrossTenant-mailboxtype":"HOSTED","X-MS-Exchange-CrossTenant-userprincipalname":"\n Wcx+PdSPTdfzPKKEDzh2Y5VHHdhHhCpQqXsTU+Y4GJFycMnwNyZKjK6caVWGbvtXLGr4hFztjLuQNTpMjcGYOT3h94pK6eQrSvqWZ/J4sSw=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"TYUPR06MB6098","Received-SPF":"pass client-ip=2a01:111:f403:c406::3;\n envelope-from=jamin_lin@aspeedtech.com;\n helo=OS8PR02CU002.outbound.protection.outlook.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, 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":"Introduce a new boolean property, \"caps-64bit-addr\", to control\nHCCPARAMS[0] (64-bit Addressing Capability).\n\nWhen enabled, the EHCI controller advertises support for 64-bit\naddress memory pointers as defined in the EHCI specification\n(Table 2-7, HCCPARAMS). This allows software to use the 64-bit\ndata structure formats described in Appendix B.\n\nWhen disabled (default), the controller reports 32-bit addressing\ncapability and uses the standard 32-bit data structures.\n\nThe EHCI CTRLDSSEGMENT register provides the upper 32 bits [63:32] used to\nform 64-bit addresses for EHCI control data structures. Per EHCI 1.0\nspec section 2.3.5, when the HCCPARAMS 64-bit Addressing Capability bit\nis zero, CTRLDSSEGMENT is not used: software cannot write it and reads\nmust return zero.\n\nAdd a capability check in the operational register write handler and\nreject guest writes to CTRLDSSEGMENT when 64-bit addressing is\nnot enabled.\n\nSigned-off-by: Jamin Lin \nReviewed-by: Cédric Le Goater \nReviewed-by: Philippe Mathieu-Daudé \n---\n hw/usb/hcd-ehci.h | 5 ++++-\n hw/usb/hcd-ehci.c | 14 +++++++++++++-\n 2 files changed, 17 insertions(+), 2 deletions(-)","diff":"diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h\nindex 3acbddfc5c..f1f2fde578 100644\n--- a/hw/usb/hcd-ehci.h\n+++ b/hw/usb/hcd-ehci.h\n@@ -257,6 +257,7 @@ struct EHCIState {\n /* properties */\n uint32_t maxframes;\n bool migrate_fetch_addr_64bit;\n+ bool caps_64bit_addr;\n \n /*\n * EHCI spec version 1.0 Section 2.3\n@@ -313,7 +314,9 @@ struct EHCIState {\n #define DEFINE_EHCI_COMMON_PROPERTIES(_state) \\\n DEFINE_PROP_UINT32(\"maxframes\", _state, ehci.maxframes, 128), \\\n DEFINE_PROP_BOOL(\"x-migrate-fetch-addr-64bit\", _state, \\\n- ehci.migrate_fetch_addr_64bit, true)\n+ ehci.migrate_fetch_addr_64bit, true), \\\n+ DEFINE_PROP_BOOL(\"caps-64bit-addr\", _state, \\\n+ ehci.caps_64bit_addr, false)\n \n extern const VMStateDescription vmstate_ehci;\n \ndiff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c\nindex 9d74259289..7166a93fd2 100644\n--- a/hw/usb/hcd-ehci.c\n+++ b/hw/usb/hcd-ehci.c\n@@ -1109,6 +1109,15 @@ static void ehci_opreg_write(void *ptr, hwaddr addr,\n }\n break;\n \n+ case CTRLDSSEGMENT:\n+ if (!s->caps_64bit_addr) {\n+ qemu_log_mask(LOG_GUEST_ERROR,\n+ \"ehci: write to CTRLDSSEGMENT while \"\n+ \"64-bit addressing capability is disabled\\n\");\n+ return;\n+ }\n+ break;\n+\n case ASYNCLISTADDR:\n if (ehci_async_enabled(s)) {\n qemu_log_mask(LOG_GUEST_ERROR,\n@@ -2554,6 +2563,9 @@ void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)\n s->maxframes);\n return;\n }\n+ if (s->caps_64bit_addr) {\n+ s->caps[0x08] |= BIT(0);\n+ }\n \n memory_region_add_subregion(&s->mem, s->capsbase, &s->mem_caps);\n memory_region_add_subregion(&s->mem, s->opregbase, &s->mem_opreg);\n@@ -2613,7 +2625,7 @@ void usb_ehci_init(EHCIState *s, DeviceState *dev)\n s->caps[0x05] = 0x00; /* No companion ports at present */\n s->caps[0x06] = 0x00;\n s->caps[0x07] = 0x00;\n- s->caps[0x08] = 0x80; /* We can cache whole frame, no 64-bit */\n+ s->caps[0x08] = 0x80; /* We can cache whole frame */\n s->caps[0x0a] = 0x00;\n s->caps[0x0b] = 0x00;\n \n","prefixes":["v6","03/11"]}