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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-26 08:59:48 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-02 18:20:24 +0300 |
| commit | c5710cd20735037ba9be0e95530f0d3795ce07e6 (patch) | |
| tree | 045e2e4b5ce52e3e4ef8a14d4d8bd38cd6b4ae46 /arch/powerpc/mm/book3s64/hash_hugetlbpage.c | |
| parent | 45d0ba527b575d47b2be75dd517b57cceda04bfe (diff) | |
| download | linux-c5710cd20735037ba9be0e95530f0d3795ce07e6.tar.xz | |
powerpc/mm: cleanup HPAGE_SHIFT setup
Only book3s/64 may select default among several HPAGE_SHIFT at runtime.
8xx always defines 512K pages as default
FSL_BOOK3E always defines 4M pages as default
This patch limits HUGETLB_PAGE_SIZE_VARIABLE to book3s/64
moves the definitions in subarches files.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/book3s64/hash_hugetlbpage.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_hugetlbpage.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c index 2d4e02aa15a3..eefa89c6117b 100644 --- a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c +++ b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c @@ -15,6 +15,9 @@ #include <asm/cacheflush.h> #include <asm/machdep.h> +unsigned int hpage_shift; +EXPORT_SYMBOL(hpage_shift); + extern long hpte_insert_repeating(unsigned long hash, unsigned long vpn, unsigned long pa, unsigned long rlags, unsigned long vflags, int psize, int ssize); @@ -150,3 +153,16 @@ void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr old_pte, pte); set_huge_pte_at(vma->vm_mm, addr, ptep, pte); } + +void hugetlbpage_init_default(void) +{ + /* Set default large page size. Currently, we pick 16M or 1M + * depending on what is available + */ + if (mmu_psize_defs[MMU_PAGE_16M].shift) + hpage_shift = mmu_psize_defs[MMU_PAGE_16M].shift; + else if (mmu_psize_defs[MMU_PAGE_1M].shift) + hpage_shift = mmu_psize_defs[MMU_PAGE_1M].shift; + else if (mmu_psize_defs[MMU_PAGE_2M].shift) + hpage_shift = mmu_psize_defs[MMU_PAGE_2M].shift; +} |