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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
parent 473ad7f4fb
commit ac55c76814
6 changed files with 109 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

28
arch/sparc/include/asm/pgalloc_64.h
View file

@ -15,6 +15,13 @@
extern struct kmem_cache *pgtable_cache;
static inline void __pgd_populate(pgd_t *pgd, pud_t *pud)
{
pgd_set(pgd, pud);
}
#define pgd_populate(MM, PGD, PUD) __pgd_populate(PGD, PUD)
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
@ -25,7 +32,23 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
kmem_cache_free(pgtable_cache, pgd);
}
#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
{
pud_set(pud, pmd);
}
#define pud_populate(MM, PUD, PMD) __pud_populate(PUD, PMD)
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return kmem_cache_alloc(pgtable_cache,
GFP_KERNEL|__GFP_REPEAT);
}
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
kmem_cache_free(pgtable_cache, pud);
}
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@ -91,4 +114,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pte_t *pte,
#define __pmd_free_tlb(tlb, pmd, addr) \
pgtable_free_tlb(tlb, pmd, false)
#define __pud_free_tlb(tlb, pud, addr) \
pgtable_free_tlb(tlb, pud, false)
#endif /* _SPARC64_PGALLOC_H */