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Tue, 14 Apr 2026 08:00:43 +0000 From: Jamin Lin To: =?iso-8859-1?Q?C=E9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Kane Chen , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: Jamin Lin , Troy Lee , "flwu@google.com" , "nabihestefan@google.com" Subject: [PATCH v2 15/17] hw/arm/aspeed_ast27x0: Set EHCI descriptor address offset Thread-Topic: [PATCH v2 15/17] hw/arm/aspeed_ast27x0: Set EHCI descriptor address offset Thread-Index: AQHcy+TLbfX2KXG/5EK1P/Ap3IRTjw== Date: Tue, 14 Apr 2026 08:00:43 +0000 Message-ID: <20260414080025.3005916-16-jamin_lin@aspeedtech.com> References: <20260414080025.3005916-1-jamin_lin@aspeedtech.com> In-Reply-To: <20260414080025.3005916-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: TYPPR06MB8206:EE_|SI4PR06MB8423:EE_ x-ms-office365-filtering-correlation-id: 2ac972ab-3ef6-44a7-87c4-08de99fbedcf x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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envelope-from=jamin_lin@aspeedtech.com; helo=TYPPR03CU001.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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On AST2700 platforms, system DRAM is mapped above 4GB with the=0A= base address at 0x400000000.=0A= =0A= The Linux EHCI driver programs the segment register to zero when=0A= 64-bit addressing is supported. As a result, descriptor addresses=0A= derived from the EHCI registers do not include the DRAM base=0A= address.=0A= =0A= Descriptor memory is allocated through the DMA API with a 64-bit=0A= DMA mask, which allows descriptors to be placed in DRAM above 4GB.=0A= When running on AST2700, this means EHCI queue heads (QH) and queue=0A= element transfer descriptors (qTD) reside at addresses starting=0A= from 0x400000000.=0A= =0A= Set the descriptor-addr-offset property to the DRAM base so the=0A= emulated EHCI controller can construct the correct descriptor=0A= addresses when accessing system memory.=0A= =0A= Signed-off-by: Jamin Lin =0A= ---=0A= hw/arm/aspeed_ast27x0.c | 3 +++=0A= 1 file changed, 3 insertions(+)=0A= =0A= diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c=0A= index 4a1f7cad73..3cdbf78ac1 100644=0A= --- a/hw/arm/aspeed_ast27x0.c=0A= +++ b/hw/arm/aspeed_ast27x0.c=0A= @@ -858,6 +858,9 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev= , Error **errp)=0A= for (i =3D 0; i < sc->ehcis_num; i++) {=0A= object_property_set_bool(OBJECT(&s->ehci[i]), "caps-64bit-addr", t= rue,=0A= &error_abort);=0A= + object_property_set_int(OBJECT(&s->ehci[i]), "descriptor-addr-offs= et",=0A= + sc->memmap[ASPEED_DEV_SDRAM],=0A= + &error_abort);=0A= if (!sysbus_realize(SYS_BUS_DEVICE(&s->ehci[i]), errp)) {=0A= return;=0A= }=0A= -- =0A= 2.43.0=0A=