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helo=nebula.arm.com; From: Penny Zheng To: , , CC: , Subject: [PATCH v4 03/11] xen/arm: avoid setting XEN_DOMCTL_CDF_iommu when IOMMU off Date: Mon, 20 Dec 2021 05:21:15 +0000 Message-ID: <20211220052123.969876-4-penny.zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211220052123.969876-1-penny.zheng@arm.com> References: <20211220052123.969876-1-penny.zheng@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 41fa8410-e15a-4553-d70a-08d9c378a233 X-MS-TrafficTypeDiagnostic: AS8PR08MB7208:EE_|VE1EUR03FT061:EE_|AS1PR08MB7498:EE_ X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:1332;OLM:1332; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(46966006)(36840700001)(40470700001)(110136005)(7696005)(44832011)(26005)(1076003)(356005)(47076005)(36756003)(508600001)(5660300002)(36860700001)(86362001)(70586007)(81166007)(2906002)(54906003)(70206006)(426003)(82310400004)(8936002)(40460700001)(83380400001)(316002)(336012)(4326008)(2616005)(186003)(6666004)(8676002)(36900700001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Dec 2021 05:21:53.3496 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 41fa8410-e15a-4553-d70a-08d9c378a233 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT061.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR08MB7498 X-ZohoMail-DKIM: pass (identity @armh.onmicrosoft.com) X-ZM-MESSAGEID: 1639977765983100002 Content-Type: text/plain; charset="utf-8" From: Stefano Stabellini When IOMMU is absent or shall not be used (trusted domain, performance, hardware limitation, ..., etc), in which cases this commit avoids setting XEN_DOMCTL_CDF_iommu to make those user cases possible and prevent failure later during device assignment. Signed-off-by: Stefano Stabellini Signed-off-by: Penny Zheng --- v3 changes: - new commit, split from the original "[PATCH v2 2/6] xen/arm: introduce direct-map for domUs" --- v4 changes - explain briefly in the commit message why we want to do device assignment without IOMMU. --- xen/arch/arm/domain_build.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 9b1a5e38d3..5a106a977c 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -3047,7 +3047,8 @@ void __init create_domUs(void) panic("Missing property 'cpus' for domain %s\n", dt_node_name(node)); =20 - if ( dt_find_compatible_node(node, NULL, "multiboot,device-tree") ) + if ( dt_find_compatible_node(node, NULL, "multiboot,device-tree") = && + iommu_enabled ) d_cfg.flags |=3D XEN_DOMCTL_CDF_iommu; =20 if ( !dt_property_read_u32(node, "nr_spis", &d_cfg.arch.nr_spis) ) --=20 2.25.1