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author | Chris Metcalf <cmetcalf@tilera.com> | 2012-03-28 13:59:18 -0400 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-05-25 12:48:21 -0400 |
commit | 73636b1aacb1a07e6fbe0d25e560e69b024a8e25 (patch) | |
tree | 9531c202c6b3f67fba1cd7ac2b83fa32c31fe197 /arch/tile/include/asm/pgtable_32.h | |
parent | 51007004f44c9588d70ffb77e1f52479bd5b0e37 (diff) | |
download | op-kernel-dev-73636b1aacb1a07e6fbe0d25e560e69b024a8e25.zip op-kernel-dev-73636b1aacb1a07e6fbe0d25e560e69b024a8e25.tar.gz |
arch/tile: allow building Linux with transparent huge pages enabled
The change adds some infrastructure for managing tile pmd's more generally,
using pte_pmd() and pmd_pte() methods to translate pmd values to and
from ptes, since on TILEPro a pmd is really just a nested structure
holding a pgd (aka pte). Several existing pmd methods are moved into
this framework, and a whole raft of additional pmd accessors are defined
that are used by the transparent hugepage framework.
The tile PTE now has a "client2" bit. The bit is used to indicate a
transparent huge page is in the process of being split into subpages.
This change also fixes a generic bug where the return value of the
generic pmdp_splitting_flush() was incorrect.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/include/asm/pgtable_32.h')
-rw-r--r-- | arch/tile/include/asm/pgtable_32.h | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/arch/tile/include/asm/pgtable_32.h b/arch/tile/include/asm/pgtable_32.h index 9f98529..27e20f6 100644 --- a/arch/tile/include/asm/pgtable_32.h +++ b/arch/tile/include/asm/pgtable_32.h @@ -111,24 +111,14 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, return pte; } -static inline void __set_pmd(pmd_t *pmdp, pmd_t pmdval) -{ - set_pte(&pmdp->pud.pgd, pmdval.pud.pgd); -} - -/* Create a pmd from a PTFN. */ -static inline pmd_t ptfn_pmd(unsigned long ptfn, pgprot_t prot) -{ - return (pmd_t){ { hv_pte_set_ptfn(prot, ptfn) } }; -} - -/* Return the page-table frame number (ptfn) that a pmd_t points at. */ -#define pmd_ptfn(pmd) hv_pte_get_ptfn((pmd).pud.pgd) - -static inline void pmd_clear(pmd_t *pmdp) -{ - __pte_clear(&pmdp->pud.pgd); -} +/* + * pmds are wrappers around pgds, which are the same as ptes. + * It's often convenient to "cast" back and forth and use the pte methods, + * which are the methods supplied by the hypervisor. + */ +#define pmd_pte(pmd) ((pmd).pud.pgd) +#define pmdp_ptep(pmdp) (&(pmdp)->pud.pgd) +#define pte_pmd(pte) ((pmd_t){ { (pte) } }) #endif /* __ASSEMBLY__ */ |