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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , Ayan Kumar Halder Subject: [XEN v2] xen/arm: arm32: Allow Xen to boot on unidentified CPUs Date: Mon, 26 Jun 2023 19:14:44 +0100 Message-ID: <20230626181444.2305769-1-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT015:EE_|PH7PR12MB5735:EE_ X-MS-Office365-Filtering-Correlation-Id: 8b6239a9-18dc-4a91-2395-08db76713a5f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(376002)(136003)(396003)(346002)(451199021)(40470700004)(36840700001)(46966006)(2906002)(4744005)(186003)(82310400005)(2616005)(82740400003)(83380400001)(81166007)(1076003)(26005)(47076005)(336012)(426003)(356005)(36860700001)(40480700001)(40460700003)(41300700001)(54906003)(86362001)(478600001)(316002)(36756003)(4326008)(70206006)(103116003)(6916009)(70586007)(5660300002)(8676002)(8936002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jun 2023 18:14:48.4034 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8b6239a9-18dc-4a91-2395-08db76713a5f X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT015.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB5735 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1687803327790100001 Content-Type: text/plain; charset="utf-8" Currently if the processor id is not identified (ie it is missing in proc-v= 7.S) , then Xen boot fails quite early. We have removed this restriction as for some CPUs (eg Cortex-R52), there is= n't any special initialization required. Signed-off-by: Ayan Kumar Halder Reviewed-by: Stefano Stabellini --- Changes from - v1 - "[PATCH v1] xen/arm: arm32: Add support to identify the Cortex-R52 pro= cessor" No need to add R52 proc id and empty stubs as there is no cpu initialization required. xen/arch/arm/arm32/head.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S index f9f7be9588..3e88178552 100644 --- a/xen/arch/arm/arm32/head.S +++ b/xen/arch/arm/arm32/head.S @@ -324,7 +324,7 @@ cpu_init: PRINT("- Missing processor info: ") print_reg r4 PRINT(" -\r\n") - b fail + b cpu_init_done 1: /* Jump to cpu_init */ ldr r1, [r1, #PROCINFO_cpu_init] /* r1 :=3D vaddr(init func) */ --=20 2.25.1