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pr=C From: Vikram Garhwal To: CC: , Vikram Garhwal , "Julien Grall" Subject: [XEN][PATCH v5 02/17] common/device_tree: change __unflatten_device_tree() Date: Tue, 11 Apr 2023 12:16:03 -0700 Message-ID: <20230411191636.26926-3-vikram.garhwal@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230411191636.26926-1-vikram.garhwal@amd.com> References: <20230411191636.26926-1-vikram.garhwal@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT052:EE_|MW4PR12MB5601:EE_ X-MS-Office365-Filtering-Correlation-Id: 7a55ab8b-09ca-432d-daf6-08db3ac15098 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)(136003)(346002)(376002)(396003)(451199021)(40470700004)(46966006)(36840700001)(36860700001)(54906003)(2616005)(47076005)(478600001)(26005)(1076003)(6666004)(81166007)(82740400003)(356005)(41300700001)(316002)(4326008)(6916009)(186003)(336012)(83380400001)(426003)(70206006)(70586007)(2906002)(5660300002)(44832011)(36756003)(82310400005)(40460700003)(86362001)(40480700001)(8676002)(8936002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Apr 2023 19:16:55.7882 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7a55ab8b-09ca-432d-daf6-08db3ac15098 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: BN8NAM11FT052.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB5601 Following changes are done to __unflatten_device_tree(): 1. __unflatten_device_tree() is renamed to unflatten_device_tree(). 2. Remove static function type. 3. Add handling of memory allocation. This will be useful in dynamic node programming when we unflatten the dt during runtime memory allocation can fail. Signed-off-by: Vikram Garhwal --- xen/common/device_tree.c | 10 ++++++---- xen/include/xen/device_tree.h | 5 +++++ 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index aed38ff63c..bf847b2584 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -2047,7 +2047,7 @@ static unsigned long unflatten_dt_node(const void *fdt, } /** - * __unflatten_device_tree - create tree of device_nodes from flat blob + * unflatten_device_tree - create tree of device_nodes from flat blob * * unflattens a device-tree, creating the * tree of struct device_node. It also fills the "name" and "type" @@ -2056,8 +2056,7 @@ static unsigned long unflatten_dt_node(const void *fdt, * @fdt: The fdt to expand * @mynodes: The device_node tree created by the call */ -static void __unflatten_device_tree(const void *fdt, - struct dt_device_node **mynodes) +void unflatten_device_tree(const void *fdt, struct dt_device_node **mynodes) { unsigned long start, mem, size; struct dt_device_node **allnextp = mynodes; @@ -2079,6 +2078,9 @@ static void __unflatten_device_tree(const void *fdt, /* Allocate memory for the expanded device tree */ mem = (unsigned long)_xmalloc (size + 4, __alignof__(struct dt_device_node)); + if ( !mem ) + panic("Cannot allocate memory for unflatten device tree\n"); + ((__be32 *)mem)[size / 4] = cpu_to_be32(0xdeadbeef); dt_dprintk(" unflattening %lx...\n", mem); @@ -2179,7 +2181,7 @@ dt_find_interrupt_controller(const struct dt_device_match *matches) void __init dt_unflatten_host_device_tree(void) { - __unflatten_device_tree(device_tree_flattened, &dt_host); + unflatten_device_tree(device_tree_flattened, &dt_host); dt_alias_scan(); } diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 19a74909ce..58ac12abe3 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -178,6 +178,11 @@ int device_tree_for_each_node(const void *fdt, int node, */ void dt_unflatten_host_device_tree(void); +/** + * unflatten any device tree. + */ +void unflatten_device_tree(const void *fdt, struct dt_device_node **mynodes); + /** * IRQ translation callback * TODO: For the moment we assume that we only have ONE -- 2.17.1