From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755242Ab2JIX7P (ORCPT ); Tue, 9 Oct 2012 19:59:15 -0400 Received: from rcsinet15.oracle.com ([148.87.113.117]:32735 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752556Ab2JIX6y (ORCPT ); Tue, 9 Oct 2012 19:58:54 -0400 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jacob Shin , Tejun Heo Cc: Stefano Stabellini , linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 5/7] x86, mm: Break down init_all_memory_mapping Date: Tue, 9 Oct 2012 16:58:33 -0700 Message-Id: <1349827115-16600-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1349827115-16600-1-git-send-email-yinghai@kernel.org> References: <1349827115-16600-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Will replace that will top-down page table initialization. new one need to take range. Signed-off-by: Yinghai Lu --- arch/x86/mm/init.c | 41 +++++++++++++++++++---------------------- 1 files changed, 19 insertions(+), 22 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index ebf76ce..23ce4db 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -393,40 +393,30 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, * Depending on the alignment of E820 ranges, this may possibly result in using * smaller size (i.e. 4K instead of 2M or 1G) page tables. */ -static void __init init_all_memory_mapping(void) +static void __init init_all_memory_mapping(unsigned long all_start, + unsigned long all_end) { unsigned long start_pfn, end_pfn; int i; - /* the ISA range is always mapped regardless of memory holes */ - init_memory_mapping(0, ISA_END_ADDRESS); - for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) { u64 start = start_pfn << PAGE_SHIFT; u64 end = end_pfn << PAGE_SHIFT; - if (end <= ISA_END_ADDRESS) + if (end <= all_start) continue; - if (start < ISA_END_ADDRESS) - start = ISA_END_ADDRESS; -#ifdef CONFIG_X86_32 - /* on 32 bit, we only map up to max_low_pfn */ - if ((start >> PAGE_SHIFT) >= max_low_pfn) + if (start < all_start) + start = all_start; + + if (start >= all_end) continue; - if ((end >> PAGE_SHIFT) > max_low_pfn) - end = max_low_pfn << PAGE_SHIFT; -#endif - init_memory_mapping(start, end); - } + if (end > all_end) + end = all_end; -#ifdef CONFIG_X86_64 - if (max_pfn > max_low_pfn) { - /* can we preseve max_low_pfn ?*/ - max_low_pfn = max_pfn; + init_memory_mapping(start, end); } -#endif } void __init init_mem_mapping(void) @@ -456,8 +446,15 @@ void __init init_mem_mapping(void) (pgt_buf_top << PAGE_SHIFT) - 1); max_pfn_mapped = 0; /* will get exact value next */ - init_all_memory_mapping(); - + /* the ISA range is always mapped regardless of memory holes */ + init_memory_mapping(0, ISA_END_ADDRESS); + init_all_memory_mapping(ISA_END_ADDRESS, end); +#ifdef CONFIG_X86_64 + if (max_pfn > max_low_pfn) { + /* can we preseve max_low_pfn ?*/ + max_low_pfn = max_pfn; + } +#endif /* * Reserve the kernel pagetable pages we used (pgt_buf_start - * pgt_buf_end) and free the other ones (pgt_buf_end - pgt_buf_top) -- 1.7.7