{"id":2227753,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227753/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424080508.53992-11-jamin_lin@aspeedtech.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/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":"<20260424080508.53992-11-jamin_lin@aspeedtech.com>","date":"2026-04-24T08:05:22","name":"[v5,10/18] hw/usb/hcd-ehci: Add property to advertise 64-bit addressing capability","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"56cf93ac9c0c41c8484476072e9714b8c45e33cb","submitter":{"id":81768,"url":"http://patchwork.ozlabs.org/api/1.1/people/81768/?format=json","name":"Jamin Lin","email":"jamin_lin@aspeedtech.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424080508.53992-11-jamin_lin@aspeedtech.com/mbox/","series":[{"id":501315,"url":"http://patchwork.ozlabs.org/api/1.1/series/501315/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501315","date":"2026-04-24T08:05:08","name":"hw/usb/ehci: Add 64-bit descriptor addressing support","version":5,"mbox":"http://patchwork.ozlabs.org/series/501315/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227753/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227753/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=aspeedtech.com header.i=@aspeedtech.com\n header.a=rsa-sha256 header.s=selector1 header.b=q0ODvRTy;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Tsirkin\" , Laurent Vivier ,\n Nicholas Piggin ,\n Harsh Prateek Bora ,\n Halil Pasic ,\n Christian Borntraeger ,\n Eric Farman , Matthew Rosato ,\n Ilya Leoshkevich , David Hildenbrand ,\n Cornelia Huck ,\n \"open list:ASPEED BMCs\" ,\n \"open list:All patches CC here\" ,\n \"open list:sPAPR pseries\" ,\n \"open list:S390 Virtio-ccw\" ","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 v5 10/18] hw/usb/hcd-ehci: Add property to advertise 64-bit\n addressing capability","Thread-Topic":"[PATCH v5 10/18] hw/usb/hcd-ehci: Add property to advertise\n 64-bit addressing capability","Thread-Index":"AQHc08EZ0uYcgSAJ1kCww/BzBJkpZA==","Date":"Fri, 24 Apr 2026 08:05:22 +0000","Message-ID":"<20260424080508.53992-11-jamin_lin@aspeedtech.com>","References":"<20260424080508.53992-1-jamin_lin@aspeedtech.com>","In-Reply-To":"<20260424080508.53992-1-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=q0ODvRTy;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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charset=\"iso-8859-1\"","Content-Transfer-Encoding":"quoted-printable","MIME-Version":"1.0","X-Exchange-RoutingPolicyChecked":"\n BeWpvcyuykgbAd0hI7IepepNproQsSLIxlllAs8qc9Z24GscX6WrwWB2JnvINZlG1gLcx9A5vpSMG+xyM9/hfsVZ3GWfB1wloONpwq8yHoh+lPSSKfALAE3I+UbMAOeLT/fAJfl8zlfJLbdIgsCfZrBDu7w/SL88/usrKDWiucWUhIFVMmTpZpCLIfkFT+gGo/pyswC9m+20PLRiOBoXvlCrfyhHZGJHmA7ev9EfZY8IICQYLsBuq8R9nWrrr/UFTn2h3g3WUtn1SHCAe6nojlhFyj61UQgZr2aGbU9tzs7i8ky1jzH7PbYU4Q8Te0FOwpJFiVOrXX5N+Td1txjqLg==","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 abc60844-b3a4-49ae-569e-08dea1d83c4e","X-MS-Exchange-CrossTenant-originalarrivaltime":"24 Apr 2026 08:05:22.9342 (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 xUU/6DweLO7M6ukCkp7pBY1oeX5qVESBkR8DZVHzk9Pst9DlN6C5n1SYSvu9dYjRKT1bi0ytc4HgCTYK2+DBHFI/upY0UBzQJDVJef0Xphs=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"SEZPR06MB5856","Received-SPF":"pass client-ip=2a01:111:f403:c405::7;\n envelope-from=jamin_lin@aspeedtech.com;\n helo=TYDPR03CU002.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 0c8bdb48ad..b23ff92e12 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":["v5","10/18"]}