Message ID | 20220523062525.2504290-3-wei.chen@arm.com (mailing list archive) |
---|---|
State | Superseded |
Headers | show
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h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=T3Bvh2fxVQKbOjJTKRlirSTts06RHaeGkbdUGi12wmA=; b=xULc6Pedz5pXWao5FTyRojNZ+Hgs/001uB45mBEqr24NcvA6mgM2la3n0g5rj9zkszCOyV2leGK7UmFuDegi09hHznruI2Vg+2cHxmIJicE6X00I3N5xCqo4kmfA6gXv1t9tUny39AGa4YRTgrQ2/Ft3G6KXOxIQUxd4D8/1Vzg= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 40.67.248.234) smtp.mailfrom=arm.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 40.67.248.234 as permitted sender) receiver=protection.outlook.com; client-ip=40.67.248.234; helo=nebula.arm.com; pr=C From: Wei Chen <wei.chen@arm.com> To: <xen-devel@lists.xenproject.org> CC: <nd@arm.com>, Wei Chen <wei.chen@arm.com>, Stefano Stabellini <sstabellini@kernel.org>, Julien Grall <julien@xen.org>, Bertrand Marquis <bertrand.marquis@arm.com>, Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>, Jiamei Xie <jiamei.xie@arm.com> Subject: [PATCH v4 2/8] xen/arm: Keep memory nodes in device tree when Xen boots from EFI Date: Mon, 23 May 2022 14:25:19 +0800 Message-ID: <20220523062525.2504290-3-wei.chen@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220523062525.2504290-1-wei.chen@arm.com> References: <20220523062525.2504290-1-wei.chen@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 5b99b23b-7e10-433b-8d7e-08da3c851e22 X-MS-TrafficTypeDiagnostic: AM6PR08MB3336:EE_|VE1EUR03FT064:EE_|AM0PR08MB3827:EE_ X-Microsoft-Antispam-PRVS: <AM0PR08MB382791A1A351E3425C671C839ED49@AM0PR08MB3827.eurprd08.prod.outlook.com> x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; 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Device tree based NUMA support for Arm - Part#1
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diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c index 29671c8df0..ec81a45de9 100644 --- a/xen/arch/arm/bootfdt.c +++ b/xen/arch/arm/bootfdt.c @@ -11,6 +11,7 @@ #include <xen/lib.h> #include <xen/kernel.h> #include <xen/init.h> +#include <xen/efi.h> #include <xen/device_tree.h> #include <xen/libfdt/libfdt.h> #include <xen/sort.h> @@ -367,7 +368,12 @@ static int __init early_scan_node(const void *fdt, { int rc = 0; - if ( device_tree_node_matches(fdt, node, "memory") ) + /* + * If Xen has been booted via UEFI, the memory banks are + * populated. So we should skip the parsing. + */ + if ( !efi_enabled(EFI_BOOT) && + device_tree_node_matches(fdt, node, "memory") ) rc = process_memory_node(fdt, node, name, depth, address_cells, size_cells, &bootinfo.mem); else if ( depth == 1 && !dt_node_cmp(name, "reserved-memory") ) diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h index e452b687d8..59d93c24a1 100644 --- a/xen/arch/arm/efi/efi-boot.h +++ b/xen/arch/arm/efi/efi-boot.h @@ -231,33 +231,8 @@ EFI_STATUS __init fdt_add_uefi_nodes(EFI_SYSTEM_TABLE *sys_table, int status; u32 fdt_val32; u64 fdt_val64; - int prev; int num_rsv; - /* - * Delete any memory nodes present. The EFI memory map is the only - * memory description provided to Xen. - */ - prev = 0; - for (;;) - { - const char *type; - int len; - - node = fdt_next_node(fdt, prev, NULL); - if ( node < 0 ) - break; - - type = fdt_getprop(fdt, node, "device_type", &len); - if ( type && strncmp(type, "memory", len) == 0 ) - { - fdt_del_node(fdt, node); - continue; - } - - prev = node; - } - /* * Delete all memory reserve map entries. When booting via UEFI, * kernel will use the UEFI memory map to find reserved regions.