提交 c14fa0b6 编写于 作者: Y Yinghai Lu 提交者: H. Peter Anvin

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: NYinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-8-git-send-email-yinghai@kernel.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
上级 84f1ae30
...@@ -274,16 +274,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, ...@@ -274,16 +274,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
memset(mr, 0, sizeof(mr)); memset(mr, 0, sizeof(mr));
nr_range = split_mem_range(mr, 0, start, end); 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++) for (i = 0; i < nr_range; i++)
ret = kernel_physical_mapping_init(mr[i].start, mr[i].end, ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask); mr[i].page_size_mask);
...@@ -296,6 +286,36 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, ...@@ -296,6 +286,36 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
__flush_tlb_all(); __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 - * Reserve the kernel pagetable pages we used (pgt_buf_start -
* pgt_buf_end) and free the other ones (pgt_buf_end - pgt_buf_top) * 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, ...@@ -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 * RO all the pagetable pages, including the ones that are beyond
* pgt_buf_end at that time. * 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), x86_init.mapping.pagetable_reserve(PFN_PHYS(pgt_buf_start),
PFN_PHYS(pgt_buf_end)); PFN_PHYS(pgt_buf_end));
if (!after_bootmem) /* stop the wrong using */
early_memtest(start, end); pgt_buf_top = 0;
return ret >> PAGE_SHIFT; early_memtest(0, max_pfn_mapped << 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
} }
/* /*
......
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