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sparc64: Switch to 4-level page tables.

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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>
This commit is contained in:
David S. Miller 2014-09-26 21:19:46 -07:00
commit ac55c76814
6 changed files with 109 additions and 10 deletions
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7
arch/sparc/kernel/smp_64.c
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@ -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;