diff options
| author | Aneesh Kumar K.V <[email protected]> | 2017-07-06 15:39:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-07-06 16:24:33 -0700 |
| commit | 40692eb5eea209c2dd55857f44b4e1d7206e91d6 (patch) | |
| tree | a625168a2c6469e12b571ec4ad9ea1fba0d4160e /arch/powerpc/mm/hugetlbpage.c | |
| parent | e1073d1e7920946ac4776a619cc40668b9e1401b (diff) | |
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/[email protected]
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Cc: Michael Ellerman <[email protected]> (powerpc)
Cc: Anshuman Khandual <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage.c')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index f0b97d4f4387..1816b965a142 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -742,8 +742,11 @@ static int __init add_huge_page_size(unsigned long long size) * Hash: 16M and 16G */ if (radix_enabled()) { - if (mmu_psize != MMU_PAGE_2M) - return -EINVAL; + if (mmu_psize != MMU_PAGE_2M) { + if (cpu_has_feature(CPU_FTR_POWER9_DD1) || + (mmu_psize != MMU_PAGE_1G)) + return -EINVAL; + } } else { if (mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G) return -EINVAL; |