Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD918C433F5 for ; Fri, 10 Dec 2021 06:57:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237244AbhLJHAi (ORCPT ); Fri, 10 Dec 2021 02:00:38 -0500 Received: from szxga02-in.huawei.com ([45.249.212.188]:16356 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237172AbhLJHAP (ORCPT ); Fri, 10 Dec 2021 02:00:15 -0500 Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4J9MB72zBlz92jX; Fri, 10 Dec 2021 14:55:59 +0800 (CST) Received: from dggpemm500006.china.huawei.com (7.185.36.236) by dggpemm500022.china.huawei.com (7.185.36.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 10 Dec 2021 14:56:39 +0800 Received: from thunder-town.china.huawei.com (10.174.178.55) by dggpemm500006.china.huawei.com (7.185.36.236) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 10 Dec 2021 14:56:38 +0800 From: Zhen Lei To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , , "H . Peter Anvin" , , Dave Young , Baoquan He , Vivek Goyal , Eric Biederman , , Catalin Marinas , "Will Deacon" , , Rob Herring , Frank Rowand , , Jonathan Corbet , CC: Zhen Lei , Randy Dunlap , Feng Zhou , Kefeng Wang , Chen Zhou Subject: [PATCH v17 08/10] of: fdt: Aggregate the processing of "linux,usable-memory-range" Date: Fri, 10 Dec 2021 14:55:31 +0800 Message-ID: <20211210065533.2023-9-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20211210065533.2023-1-thunder.leizhen@huawei.com> References: <20211210065533.2023-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.174.178.55] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500006.china.huawei.com (7.185.36.236) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, we parse the "linux,usable-memory-range" property in early_init_dt_scan_chosen(), to obtain the specified memory range of the crash kernel. We then reserve the required memory after early_init_dt_scan_memory() has identified all available physical memory. Because the two pieces of code are separated far, the readability and maintainability are reduced. So bring them together. Suggested-by: Rob Herring Signed-off-by: Zhen Lei Tested-by: Dave Kleikamp --- drivers/of/fdt.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index bdca35284cebd56..37b477a51175359 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -965,8 +965,7 @@ static void __init early_init_dt_check_for_elfcorehdr(unsigned long node) elfcorehdr_addr, elfcorehdr_size); } -static phys_addr_t cap_mem_addr; -static phys_addr_t cap_mem_size; +static unsigned long chosen_node_offset = -FDT_ERR_NOTFOUND; /** * early_init_dt_check_for_usable_mem_range - Decode usable memory range @@ -977,6 +976,11 @@ static void __init early_init_dt_check_for_usable_mem_range(unsigned long node) { const __be32 *prop; int len; + phys_addr_t cap_mem_addr; + phys_addr_t cap_mem_size; + + if ((long)node < 0) + return; pr_debug("Looking for usable-memory-range property... "); @@ -989,6 +993,8 @@ static void __init early_init_dt_check_for_usable_mem_range(unsigned long node) pr_debug("cap_mem_start=%pa cap_mem_size=%pa\n", &cap_mem_addr, &cap_mem_size); + + memblock_cap_memory_range(cap_mem_addr, cap_mem_size); } #ifdef CONFIG_SERIAL_EARLYCON @@ -1137,9 +1143,10 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname, (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0)) return 0; + chosen_node_offset = node; + early_init_dt_check_for_initrd(node); early_init_dt_check_for_elfcorehdr(node); - early_init_dt_check_for_usable_mem_range(node); /* Retrieve command line */ p = of_get_flat_dt_prop(node, "bootargs", &l); @@ -1275,7 +1282,7 @@ void __init early_init_dt_scan_nodes(void) of_scan_flat_dt(early_init_dt_scan_memory, NULL); /* Handle linux,usable-memory-range property */ - memblock_cap_memory_range(cap_mem_addr, cap_mem_size); + early_init_dt_check_for_usable_mem_range(chosen_node_offset); } bool __init early_init_dt_scan(void *params) -- 2.25.1