Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754346Ab2KLV0w (ORCPT ); Mon, 12 Nov 2012 16:26:52 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:29681 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754069Ab2KLVTc (ORCPT ); Mon, 12 Nov 2012 16:19:32 -0500 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jacob Shin Cc: Andrew Morton , Stefano Stabellini , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 20/46] x86, mm: Break down init_all_memory_mapping Date: Mon, 12 Nov 2012 13:18:16 -0800 Message-Id: <1352755122-25660-21-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1352755122-25660-1-git-send-email-yinghai@kernel.org> References: <20121112193044.GA11615@phenom.dumpdata.com> <1352755122-25660-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2729 Lines: 89 Will replace that with top-down page table initialization. New API need to take range: init_range_memory_mapping() 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 daea254..47a1ba2 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -399,40 +399,30 @@ 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_range_memory_mapping(unsigned long range_start, + unsigned long range_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 = (u64)start_pfn << PAGE_SHIFT; u64 end = (u64)end_pfn << PAGE_SHIFT; - if (end <= ISA_END_ADDRESS) + if (end <= range_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 < range_start) + start = range_start; + + if (start >= range_end) continue; - if ((end >> PAGE_SHIFT) > max_low_pfn) - end = max_low_pfn << PAGE_SHIFT; -#endif - init_memory_mapping(start, end); - } + if (end > range_end) + end = range_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) @@ -462,8 +452,15 @@ 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_range_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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/