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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-06-20 09:00:21 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-21 06:01:56 (GMT) |
| commit | 6d492ecc6489113968ec269be1cf88942d4a5d29 (patch) | |
| tree | 54be7af9af64fdc07e668013e3b6282e3a3de217 /arch/powerpc/mm/hash_utils_64.c | |
| parent | c367714ce807faff3f0c48064cda158d5117b419 (diff) | |
| download | linux-fsl-qoriq-6d492ecc6489113968ec269be1cf88942d4a5d29.tar.xz | |
powerpc/THP: Add code to handle HPTE faults for hugepages
The deposted PTE page in the second half of the PMD table is used to
track the state on hash PTEs. After updating the HPTE, we mark the
coresponding slot in the deposted PTE page valid.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index e8434ca..7a81e86 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1050,13 +1050,26 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap) goto bail; } -#ifdef CONFIG_HUGETLB_PAGE if (hugeshift) { - rc = __hash_page_huge(ea, access, vsid, ptep, trap, local, - ssize, hugeshift, psize); + if (pmd_trans_huge(*(pmd_t *)ptep)) + rc = __hash_page_thp(ea, access, vsid, (pmd_t *)ptep, + trap, local, ssize, psize); +#ifdef CONFIG_HUGETLB_PAGE + else + rc = __hash_page_huge(ea, access, vsid, ptep, trap, + local, ssize, hugeshift, psize); +#else + else { + /* + * if we have hugeshift, and is not transhuge with + * hugetlb disabled, something is really wrong. + */ + rc = 1; + WARN_ON(1); + } +#endif goto bail; } -#endif /* CONFIG_HUGETLB_PAGE */ #ifndef CONFIG_PPC_64K_PAGES DBG_LOW(" i-pte: %016lx\n", pte_val(*ptep)); |