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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 12:16:21 -0700 Message-ID: <20230411191636.26926-21-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: BN8NAM11FT113:EE_|DM4PR12MB6541:EE_ X-MS-Office365-Filtering-Correlation-Id: 1db08cfe-55db-45a7-8ea6-08db3ac15a73 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)(346002)(136003)(39860400002)(396003)(376002)(451199021)(46966006)(36840700001)(40470700004)(40480700001)(36860700001)(82740400003)(47076005)(336012)(426003)(83380400001)(8676002)(316002)(54906003)(478600001)(36756003)(1076003)(26005)(2616005)(6666004)(186003)(44832011)(4326008)(81166007)(5660300002)(2906002)(6916009)(40460700003)(356005)(70586007)(86362001)(70206006)(8936002)(82310400005)(41300700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Apr 2023 19:17:12.3366 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1db08cfe-55db-45a7-8ea6-08db3ac15a73 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: BN8NAM11FT113.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6541 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