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| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2024-01-17 22:57:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-16 21:10:53 +0300 |
| commit | d0d1f9a9b93783db25a64521d1c6613e827d3ffe (patch) | |
| tree | 538eabc970fa8d7a20d1c5544cbf294c1c6bd98f /arch/riscv | |
| parent | 21dba4e4f071d038b7495da26fd1e9d96c9367ac (diff) | |
| download | linux-d0d1f9a9b93783db25a64521d1c6613e827d3ffe.tar.xz | |
riscv: Fix hugetlb_mask_last_page() when NAPOT is enabled
[ Upstream commit a179a4bfb694f80f2709a1d0398469e787acb974 ]
When NAPOT is enabled, a new hugepage size is available and then we need
to make hugetlb_mask_last_page() aware of that.
Fixes: 82a1a1f3bfb6 ("riscv: mm: support Svnapot in hugetlb page")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240117195741.1926459-3-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/mm/hugetlbpage.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/riscv/mm/hugetlbpage.c b/arch/riscv/mm/hugetlbpage.c index 24c0179565d8..87af75ee7186 100644 --- a/arch/riscv/mm/hugetlbpage.c +++ b/arch/riscv/mm/hugetlbpage.c @@ -125,6 +125,26 @@ pte_t *huge_pte_offset(struct mm_struct *mm, return pte; } +unsigned long hugetlb_mask_last_page(struct hstate *h) +{ + unsigned long hp_size = huge_page_size(h); + + switch (hp_size) { +#ifndef __PAGETABLE_PMD_FOLDED + case PUD_SIZE: + return P4D_SIZE - PUD_SIZE; +#endif + case PMD_SIZE: + return PUD_SIZE - PMD_SIZE; + case napot_cont_size(NAPOT_CONT64KB_ORDER): + return PMD_SIZE - napot_cont_size(NAPOT_CONT64KB_ORDER); + default: + break; + } + + return 0UL; +} + static pte_t get_clear_contig(struct mm_struct *mm, unsigned long addr, pte_t *ptep, |