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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-07-06 15:39:20 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:33 -0700 |
| commit | 40692eb5eea209c2dd55857f44b4e1d7206e91d6 (patch) | |
| tree | a625168a2c6469e12b571ec4ad9ea1fba0d4160e /arch/powerpc/include/asm/book3s | |
| parent | mm/hugetlb: clean up ARCH_HAS_GIGANTIC_PAGE (diff) | |
| download | linux-dev-40692eb5eea209c2dd55857f44b4e1d7206e91d6.tar.xz linux-dev-40692eb5eea209c2dd55857f44b4e1d7206e91d6.zip | |
powerpc/mm/hugetlb: add support for 1G huge pages
POWER9 supports hugepages of size 2M and 1G in radix MMU mode. This
patch enables the usage of 1G page size for hugetlbfs. This also update
the helper such we can do 1G page allocation at runtime.
We still don't enable 1G page size on DD1 version. This is to avoid
doing workaround mentioned in commit 6d3a0379ebdc ("powerpc/mm: Add
radix__tlb_flush_pte_p9_dd1()").
Link: http://lkml.kernel.org/r/1494995292-4443-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/include/asm/book3s')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hugetlb.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h index 6666cd366596..5c28bd6f2ae1 100644 --- a/arch/powerpc/include/asm/book3s/64/hugetlb.h +++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h @@ -50,4 +50,14 @@ static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, else return entry; } + +#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE +static inline bool gigantic_page_supported(void) +{ + if (radix_enabled()) + return true; + return false; +} +#endif + #endif |