Commit-ID: c14fa0b63b5b4234667c03fdc3314c0881caa514 Gitweb: http://git.kernel.org/tip/c14fa0b63b5b4234667c03fdc3314c0881caa514 Author: Yinghai Lu <ying...@kernel.org> AuthorDate: Fri, 16 Nov 2012 19:38:44 -0800 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Sat, 17 Nov 2012 11:59:06 -0800
x86, mm: Find early page table buffer together We should not do that in every calling of init_memory_mapping. At the same time need to move down early_memtest, and could remove after_bootmem checking. -v2: fix one early_memtest with 32bit by passing max_pfn_mapped instead. Signed-off-by: Yinghai Lu <ying...@kernel.org> Link: http://lkml.kernel.org/r/1353123563-3103-8-git-send-email-ying...@kernel.org Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/mm/init.c | 66 ++++++++++++++++++++++++++++-------------------------- 1 file changed, 34 insertions(+), 32 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 51f919f..1ce0d03 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -274,16 +274,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, memset(mr, 0, sizeof(mr)); nr_range = split_mem_range(mr, 0, start, end); - /* - * Find space for the kernel direct mapping tables. - * - * Later we should allocate these tables in the local node of the - * memory mapped. Unfortunately this is done currently before the - * nodes are discovered. - */ - if (!after_bootmem) - find_early_table_space(start, end); - for (i = 0; i < nr_range; i++) ret = kernel_physical_mapping_init(mr[i].start, mr[i].end, mr[i].page_size_mask); @@ -296,6 +286,36 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, __flush_tlb_all(); + return ret >> PAGE_SHIFT; +} + +void __init init_mem_mapping(void) +{ + probe_page_size_mask(); + + /* + * Find space for the kernel direct mapping tables. + * + * Later we should allocate these tables in the local node of the + * memory mapped. Unfortunately this is done currently before the + * nodes are discovered. + */ +#ifdef CONFIG_X86_64 + find_early_table_space(0, max_pfn<<PAGE_SHIFT); +#else + find_early_table_space(0, max_low_pfn<<PAGE_SHIFT); +#endif + max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); + max_pfn_mapped = max_low_pfn_mapped; + +#ifdef CONFIG_X86_64 + if (max_pfn > max_low_pfn) { + max_pfn_mapped = init_memory_mapping(1UL<<32, + max_pfn<<PAGE_SHIFT); + /* 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) @@ -311,32 +331,14 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, * RO all the pagetable pages, including the ones that are beyond * pgt_buf_end at that time. */ - if (!after_bootmem && pgt_buf_end > pgt_buf_start) + if (pgt_buf_end > pgt_buf_start) x86_init.mapping.pagetable_reserve(PFN_PHYS(pgt_buf_start), PFN_PHYS(pgt_buf_end)); - if (!after_bootmem) - early_memtest(start, end); + /* stop the wrong using */ + pgt_buf_top = 0; - return ret >> PAGE_SHIFT; -} - -void __init init_mem_mapping(void) -{ - probe_page_size_mask(); - - /* max_pfn_mapped is updated here */ - max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); - max_pfn_mapped = max_low_pfn_mapped; - -#ifdef CONFIG_X86_64 - if (max_pfn > max_low_pfn) { - max_pfn_mapped = init_memory_mapping(1UL<<32, - max_pfn<<PAGE_SHIFT); - /* can we preseve max_low_pfn ?*/ - max_low_pfn = max_pfn; - } -#endif + early_memtest(0, max_pfn_mapped << PAGE_SHIFT); } /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
