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| author | David S. Miller <davem@davemloft.net> | 2014-09-27 06:19:46 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-06 01:53:38 +0200 |
| commit | ac55c768143aa34cc3789c4820cbb0809a76fd9c (patch) | |
| tree | f6bb7af5b71e7935169a778e3f7e7694fbd1416f /arch/sparc/kernel | |
| parent | sparc64: Fix reversed start/end in flush_tlb_kernel_range() (diff) | |
| download | linux-ac55c768143aa34cc3789c4820cbb0809a76fd9c.tar.xz linux-ac55c768143aa34cc3789c4820cbb0809a76fd9c.zip | |
sparc64: Switch to 4-level page tables.
This has become necessary with chips that support more than 43-bits
of physical addressing.
Based almost entirely upon a patch by Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/smp_64.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index f7ba87543e5f..c9300bfaee5a 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -1467,6 +1467,13 @@ static void __init pcpu_populate_pte(unsigned long addr) pud_t *pud; pmd_t *pmd; + if (pgd_none(*pgd)) { + pud_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + pgd_populate(&init_mm, pgd, new); + } + pud = pud_offset(pgd, addr); if (pud_none(*pud)) { pmd_t *new; |