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helo=nebula.arm.com; From: Penny Zheng To: , , CC: , Subject: [PATCH v5 03/11] xen/arm: avoid setting XEN_DOMCTL_CDF_iommu when IOMMU off Date: Thu, 27 Jan 2022 07:49:21 +0000 Message-ID: <20220127074929.502885-4-penny.zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220127074929.502885-1-penny.zheng@arm.com> References: <20220127074929.502885-1-penny.zheng@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 07f30cc9-8caf-48d9-975f-08d9e169c42e X-MS-TrafficTypeDiagnostic: VI1PR08MB4029:EE_|VE1EUR03FT028:EE_|PA4PR08MB6128: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:(13230001)(4636009)(40470700004)(36840700001)(46966006)(2616005)(44832011)(81166007)(2906002)(356005)(36860700001)(83380400001)(1076003)(47076005)(82310400004)(186003)(26005)(70586007)(5660300002)(508600001)(426003)(336012)(4326008)(8936002)(8676002)(6666004)(36756003)(70206006)(316002)(86362001)(40460700003)(54906003)(7696005)(110136005)(36900700001)(20210929001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2022 07:51:02.7745 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 07f30cc9-8caf-48d9-975f-08d9e169c42e 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: VE1EUR03FT028.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR08MB6128 X-ZohoMail-DKIM: pass (identity @armh.onmicrosoft.com) X-ZM-MESSAGEID: 1643269891615100001 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 Tested-by: Stefano Stabellini --- 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. --- v5 changes: - nothing changed --- 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 6467e8ee32..c1e8c99f64 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