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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-06-28 14:30:39 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 15:16:06 +0400 |
| commit | 7482b0e962e128c5b574aa29761f97164189ef14 (patch) | |
| tree | 11f99e89b1957c8b47fc1a17cfafc1899471b112 /arch/x86/mm | |
| parent | df366e9822beca97115ba9745cbe1ea1f26fb111 (diff) | |
| download | linux-7482b0e962e128c5b574aa29761f97164189ef14.tar.xz | |
x86: fix init_memory_mapping over boundary v3
some ram-end boundary only has page alignment, instead of 2M alignment.
v2: make init_memory_mapping more solid: start could be any value other than 0
v3: fix NON PAE by handling left over in kernel_physical_mapping
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_32.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index b9cf7f705302..90ca67be965b 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -195,7 +195,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base, unsigned pages_2m = 0, pages_4k = 0; unsigned limit_pfn = end >> PAGE_SHIFT; - pgd_idx = pgd_index(PAGE_OFFSET); + pgd_idx = pgd_index(start + PAGE_OFFSET); pgd = pgd_base + pgd_idx; pfn = start >> PAGE_SHIFT; @@ -218,7 +218,8 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base, * and overlapping MTRRs into large pages can cause * slowdowns. */ - if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0)) { + if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0) && + (pfn + PTRS_PER_PTE) <= limit_pfn) { unsigned int addr2; pgprot_t prot = PAGE_KERNEL_LARGE; @@ -233,13 +234,12 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base, set_pmd(pmd, pfn_pmd(pfn, prot)); pfn += PTRS_PER_PTE; - max_pfn_mapped = pfn; continue; } pte = one_page_table_init(pmd); for (pte_ofs = 0; - pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn; + pte_ofs < PTRS_PER_PTE && pfn < limit_pfn; pte++, pfn++, pte_ofs++, addr += PAGE_SIZE) { pgprot_t prot = PAGE_KERNEL; @@ -249,7 +249,6 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base, pages_4k++; set_pte(pte, pfn_pte(pfn, prot)); } - max_pfn_mapped = pfn; } } update_page_count(PG_LEVEL_2M, pages_2m); @@ -729,7 +728,7 @@ void __init setup_bootmem_allocator(void) static void __init find_early_table_space(unsigned long end) { - unsigned long puds, pmds, tables, start; + unsigned long puds, pmds, ptes, tables, start; puds = (end + PUD_SIZE - 1) >> PUD_SHIFT; tables = PAGE_ALIGN(puds * sizeof(pud_t)); @@ -737,10 +736,15 @@ static void __init find_early_table_space(unsigned long end) pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT; tables += PAGE_ALIGN(pmds * sizeof(pmd_t)); - if (!cpu_has_pse) { - int ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; - tables += PAGE_ALIGN(ptes * sizeof(pte_t)); - } + if (cpu_has_pse) { + unsigned long extra; + extra = end - ((end>>21) << 21); + extra += (2UL<<20); + ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT; + } else + ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; + + tables += PAGE_ALIGN(ptes * sizeof(pte_t)); /* * RED-PEN putting page tables only on node 0 could |